1 /*

     2  * Copyright (c) 2003, 2014, 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 CC_INTERP

    26  protected:

    27   // Interpreter specific version of call_VM_base

    28   virtual void call_VM_leaf_base(address entry_point,

    29                                  int number_of_arguments);

    30 

    31   virtual void call_VM_base(Register oop_result,

    32                             Register java_thread,

    33                             Register last_java_sp,

    34                             address  entry_point,

    35                             int number_of_arguments,

    36                             bool check_exceptions);

    37 

    38   virtual void check_and_handle_popframe(Register java_thread);

    39   virtual void check_and_handle_earlyret(Register java_thread);

    40 

    41   // base routine for all dispatches

    42   void dispatch_base(TosState state, address* table, bool verifyoop = true);

    43 #endif // CC_INTERP

    44 

    45  public:

    46   InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code), _locals_register(r14), _bcp_register(r13) {}

    47 

    48   void load_earlyret_value(TosState state);

    49 

    50 #ifdef CC_INTERP

    51   void save_bcp()                                          { /*  not needed in c++ interpreter and harmless */ }

    52   void restore_bcp()                                       { /*  not needed in c++ interpreter and harmless */ }

    53 

    54   // Helpers for runtime call arguments/results

    55   void get_method(Register reg);

    56 

    57 #else

    58 

    59   // Interpreter-specific registers

    60   void save_bcp() {

    61     movptr(Address(rbp, frame::interpreter_frame_bcp_offset * wordSize), r13);

    62   }

    63 

    64   void restore_bcp() {

    65     movptr(r13, Address(rbp, frame::interpreter_frame_bcp_offset * wordSize));

    66   }

    67 

    68   void restore_locals() {

    69     movptr(r14, Address(rbp, frame::interpreter_frame_locals_offset * wordSize));

    70   }

    71 

    72   // Helpers for runtime call arguments/results

    73   void get_method(Register reg) {

    74     movptr(reg, Address(rbp, frame::interpreter_frame_method_offset * wordSize));

    75   }

    76 

    77   void get_const(Register reg) {

    78     get_method(reg);

    79     movptr(reg, Address(reg, Method::const_offset()));

    80   }

    81 

    82   void get_constant_pool(Register reg) {

    83     get_const(reg);

    84     movptr(reg, Address(reg, ConstMethod::constants_offset()));

    85   }

    86 

    87   void get_constant_pool_cache(Register reg) {

    88     get_constant_pool(reg);

    89     movptr(reg, Address(reg, ConstantPool::cache_offset_in_bytes()));

    90   }

    91 

    92   void get_cpool_and_tags(Register cpool, Register tags) {

    93     get_constant_pool(cpool);

    94     movptr(tags, Address(cpool, ConstantPool::tags_offset_in_bytes()));

    95   }

    96 

    97   void get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset);

    98   void get_cache_and_index_at_bcp(Register cache, Register index, int bcp_offset, size_t index_size = sizeof(u2));

    99   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));

   100   void get_cache_entry_pointer_at_bcp(Register cache, Register tmp, int bcp_offset, size_t index_size = sizeof(u2));

   101   void get_cache_index_at_bcp(Register index, int bcp_offset, size_t index_size = sizeof(u2));

   102 

   103   // load cpool->resolved_references(index);

   104   void load_resolved_reference_at_index(Register result, Register index);

   105 

   106   void pop_ptr(Register r = rax);

   107   void pop_i(Register r = rax);

   108   void pop_l(Register r = rax);

   109   void pop_f(XMMRegister r = xmm0);

   110   void pop_d(XMMRegister r = xmm0);

   111   void push_ptr(Register r = rax);

   112   void push_i(Register r = rax);

   113   void push_l(Register r = rax);

   114   void push_f(XMMRegister r = xmm0);

   115   void push_d(XMMRegister r = xmm0);

   116 

   117   void pop(Register r ) { ((MacroAssembler*)this)->pop(r); }

   118 

   119   void push(Register r ) { ((MacroAssembler*)this)->push(r); }

   120   void push(int32_t imm ) { ((MacroAssembler*)this)->push(imm); }

   121 

   122   void pop(TosState state); // transition vtos -> state

   123   void push(TosState state); // transition state -> vtos

   124 

   125   void empty_expression_stack() {

   126     movptr(rsp, Address(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize));

   127     // NULL last_sp until next java call

   128     movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);

   129   }

   130 

   131   // Helpers for swap and dup

   132   void load_ptr(int n, Register val);

   133   void store_ptr(int n, Register val);

   134 

   135   // Generate a subtype check: branch to ok_is_subtype if sub_klass is

   136   // a subtype of super_klass.

   137   void gen_subtype_check( Register sub_klass, Label &ok_is_subtype );

   138 

   139   // Dispatching

   140   void dispatch_prolog(TosState state, int step = 0);

   141   void dispatch_epilog(TosState state, int step = 0);

   142   // dispatch via ebx (assume ebx is loaded already)

   143   void dispatch_only(TosState state);

   144   // dispatch normal table via ebx (assume ebx is loaded already)

   145   void dispatch_only_normal(TosState state);

   146   void dispatch_only_noverify(TosState state);

   147   // load ebx from [esi + step] and dispatch via ebx

   148   void dispatch_next(TosState state, int step = 0);

   149   // load ebx from [esi] and dispatch via ebx and table

   150   void dispatch_via (TosState state, address* table);

   151 

   152   // jump to an invoked target

   153   void prepare_to_jump_from_interpreted();

   154   void jump_from_interpreted(Register method, Register temp);

   155 

   156 

   157   // Returning from interpreted functions

   158   //

   159   // Removes the current activation (incl. unlocking of monitors)

   160   // and sets up the return address.  This code is also used for

   161   // exception unwindwing. In that case, we do not want to throw

   162   // IllegalMonitorStateExceptions, since that might get us into an

   163   // infinite rethrow exception loop.

   164   // Additionally this code is used for popFrame and earlyReturn.

   165   // In popFrame case we want to skip throwing an exception,

   166   // installing an exception, and notifying jvmdi.

   167   // In earlyReturn case we only want to skip throwing an exception

   168   // and installing an exception.

   169   void remove_activation(TosState state, Register ret_addr,

   170                          bool throw_monitor_exception = true,

   171                          bool install_monitor_exception = true,

   172                          bool notify_jvmdi = true);

   173 #endif // CC_INTERP

   174   void get_method_counters(Register method, Register mcs, Label& skip);

   175 

   176   // Object locking

   177   void lock_object  (Register lock_reg);

   178   void unlock_object(Register lock_reg);

   179 

   180 #ifndef CC_INTERP

   181 

   182   // Interpreter profiling operations

   183   void set_method_data_pointer_for_bcp();

   184   void test_method_data_pointer(Register mdp, Label& zero_continue);

   185   void verify_method_data_pointer();

   186 

   187   void set_mdp_data_at(Register mdp_in, int constant, Register value);

   188   void increment_mdp_data_at(Address data, bool decrement = false);

   189   void increment_mdp_data_at(Register mdp_in, int constant,

   190                              bool decrement = false);

   191   void increment_mdp_data_at(Register mdp_in, Register reg, int constant,

   192                              bool decrement = false);

   193   void increment_mask_and_jump(Address counter_addr,

   194                                int increment, Address mask,

   195                                Register scratch, bool preloaded,

   196                                Condition cond, Label* where);

   197   void set_mdp_flag_at(Register mdp_in, int flag_constant);

   198   void test_mdp_data_at(Register mdp_in, int offset, Register value,

   199                         Register test_value_out,

   200                         Label& not_equal_continue);

   201 

   202   void record_klass_in_profile(Register receiver, Register mdp,

   203                                Register reg2, bool is_virtual_call);

   204   void record_klass_in_profile_helper(Register receiver, Register mdp,

   205                                       Register reg2, int start_row,

   206                                       Label& done, bool is_virtual_call);

   207 

   208   void update_mdp_by_offset(Register mdp_in, int offset_of_offset);

   209   void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp);

   210   void update_mdp_by_constant(Register mdp_in, int constant);

   211   void update_mdp_for_ret(Register return_bci);

   212 

   213   void profile_taken_branch(Register mdp, Register bumped_count);

   214   void profile_not_taken_branch(Register mdp);

   215   void profile_call(Register mdp);

   216   void profile_final_call(Register mdp);

   217   void profile_virtual_call(Register receiver, Register mdp,

   218                             Register scratch2,

   219                             bool receiver_can_be_null = false);

   220   void profile_ret(Register return_bci, Register mdp);

   221   void profile_null_seen(Register mdp);

   222   void profile_typecheck(Register mdp, Register klass, Register scratch);

   223   void profile_typecheck_failed(Register mdp);

   224   void profile_switch_default(Register mdp);

   225   void profile_switch_case(Register index_in_scratch, Register mdp,

   226                            Register scratch2);

   227 

   228   // Debugging

   229   // only if +VerifyOops && state == atos

   230   void verify_oop(Register reg, TosState state = atos);

   231   // only if +VerifyFPU  && (state == ftos || state == dtos)

   232   void verify_FPU(int stack_depth, TosState state = ftos);

   233 

   234 #endif // !CC_INTERP

   235 

   236   typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;

   237 

   238   // support for jvmti/dtrace

   239   void notify_method_entry();

   240   void notify_method_exit(TosState state, NotifyMethodExitMode mode);