1 /*
2 * Copyright (c) 1997, 2010, 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 // This file specializes the assember with interpreter-specific macros
26
27
28 class InterpreterMacroAssembler: public MacroAssembler {
29 #ifndef CC_INTERP
30 protected:
31 // Interpreter specific version of call_VM_base
32 virtual void call_VM_leaf_base(
33 address entry_point,
34 int number_of_arguments
35 );
36
37 virtual void call_VM_base(
38 Register oop_result,
39 Register java_thread,
40 Register last_java_sp,
41 address entry_point,
42 int number_of_arguments,
43 bool check_exceptions
44 );
45
46 virtual void check_and_handle_popframe(Register java_thread);
47 virtual void check_and_handle_earlyret(Register java_thread);
48
49 // base routine for all dispatches
50 void dispatch_base(TosState state, address* table, bool verifyoop = true);
51 #endif /* CC_INTERP */
52
53 public:
54 InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code) {}
55
56 void load_earlyret_value(TosState state);
57
58 // Interpreter-specific registers
59 #ifdef CC_INTERP
60 void save_bcp() { /* not needed in c++ interpreter and harmless */ }
61 void restore_bcp() { /* not needed in c++ interpreter and harmless */ }
62
63 // Helpers for runtime call arguments/results
64 void get_method(Register reg);
65
66 #else
67
68 void save_bcp() { movptr(Address(rbp, frame::interpreter_frame_bcx_offset * wordSize), rsi); }
69 void restore_bcp() { movptr(rsi, Address(rbp, frame::interpreter_frame_bcx_offset * wordSize)); }
70 void restore_locals() { movptr(rdi, Address(rbp, frame::interpreter_frame_locals_offset * wordSize)); }
71
72 // Helpers for runtime call arguments/results
73 void get_method(Register reg) { movptr(reg, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); }
74 void get_constant_pool(Register reg) { get_method(reg); movptr(reg, Address(reg, methodOopDesc::constants_offset())); }
75 void get_constant_pool_cache(Register reg) { get_constant_pool(reg); movptr(reg, Address(reg, constantPoolOopDesc::cache_offset_in_bytes())); }
76 void get_cpool_and_tags(Register cpool, Register tags) { get_constant_pool(cpool); movptr(tags, Address(cpool, constantPoolOopDesc::tags_offset_in_bytes()));
77 }
78 void get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset);
79 void get_cache_and_index_at_bcp(Register cache, Register index, int bcp_offset, size_t index_size = sizeof(u2));
80 void get_cache_entry_pointer_at_bcp(Register cache, Register tmp, int bcp_offset, size_t index_size = sizeof(u2));
81 void get_cache_index_at_bcp(Register index, int bcp_offset, size_t index_size = sizeof(u2));
82
83 // Expression stack
84 void f2ieee(); // truncate ftos to 32bits
85 void d2ieee(); // truncate dtos to 64bits
86
87 void pop_ptr(Register r = rax);
88 void pop_i(Register r = rax);
89 void pop_l(Register lo = rax, Register hi = rdx);
90 void pop_f();
91 void pop_d();
92
93 void push_ptr(Register r = rax);
94 void push_i(Register r = rax);
95 void push_l(Register lo = rax, Register hi = rdx);
96 void push_d(Register r = rax);
97 void push_f();
98
99 void pop(TosState state); // transition vtos -> state
100 void push(TosState state); // transition state -> vtos
101
102 void pop(Register r ) { ((MacroAssembler*)this)->pop(r); }
103
104 void push(Register r ) { ((MacroAssembler*)this)->push(r); }
105 void push(int32_t imm ) { ((MacroAssembler*)this)->push(imm); }
106
107 // These are dummies to prevent surprise implicit conversions to Register
108 void pop(void* v ); // Add unimplemented ambiguous method
109 void push(void* v ); // Add unimplemented ambiguous method
110
111 void empty_expression_stack() {
112 movptr(rsp, Address(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize));
113 // NULL last_sp until next java call
114 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
115 }
116
117 // Helpers for swap and dup
118 void load_ptr(int n, Register val);
119 void store_ptr(int n, Register val);
120
121 // Super call_VM calls - correspond to MacroAssembler::call_VM(_leaf) calls
122 void super_call_VM_leaf(address entry_point);
123 void super_call_VM_leaf(address entry_point, Register arg_1);
124 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2);
125 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3);
126
127 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
128 // a subtype of super_klass. EAX holds the super_klass. Blows ECX
129 // and EDI. Register sub_klass cannot be any of the above.
130 void gen_subtype_check( Register sub_klass, Label &ok_is_subtype );
131
132 // Dispatching
133 void dispatch_prolog(TosState state, int step = 0);
134 void dispatch_epilog(TosState state, int step = 0);
135 void dispatch_only(TosState state); // dispatch via rbx, (assume rbx, is loaded already)
136 void dispatch_only_normal(TosState state); // dispatch normal table via rbx, (assume rbx, is loaded already)
137 void dispatch_only_noverify(TosState state);
138 void dispatch_next(TosState state, int step = 0); // load rbx, from [esi + step] and dispatch via rbx,
139 void dispatch_via (TosState state, address* table); // load rbx, from [esi] and dispatch via rbx, and table
140
141
142 // jump to an invoked target
143 void prepare_to_jump_from_interpreted();
144 void jump_from_interpreted(Register method, Register temp);
145
146 // Returning from interpreted functions
147 //
148 // Removes the current activation (incl. unlocking of monitors)
149 // and sets up the return address. This code is also used for
150 // exception unwindwing. In that case, we do not want to throw
151 // IllegalMonitorStateExceptions, since that might get us into an
152 // infinite rethrow exception loop.
153 // Additionally this code is used for popFrame and earlyReturn.
154 // In popFrame case we want to skip throwing an exception,
155 // installing an exception, and notifying jvmdi.
156 // In earlyReturn case we only want to skip throwing an exception
157 // and installing an exception.
158 void remove_activation(TosState state, Register ret_addr,
159 bool throw_monitor_exception = true,
160 bool install_monitor_exception = true,
161 bool notify_jvmdi = true);
162 #endif /* !CC_INTERP */
163
164 // Debugging
165 void verify_oop(Register reg, TosState state = atos); // only if +VerifyOops && state == atos
166 #ifndef CC_INTERP
167 void verify_FPU(int stack_depth, TosState state = ftos); // only if +VerifyFPU && (state == ftos || state == dtos)
168
169 #endif /* !CC_INTERP */
170
171 // Object locking
172 void lock_object (Register lock_reg);
173 void unlock_object(Register lock_reg);
174
175 #ifndef CC_INTERP
176
177 // Interpreter profiling operations
178 void set_method_data_pointer_for_bcp();
179 void test_method_data_pointer(Register mdp, Label& zero_continue);
180 void verify_method_data_pointer();
181
182 void set_mdp_data_at(Register mdp_in, int constant, Register value);
183 void increment_mdp_data_at(Address data, bool decrement = false);
184 void increment_mdp_data_at(Register mdp_in, int constant,
185 bool decrement = false);
186 void increment_mdp_data_at(Register mdp_in, Register reg, int constant,
187 bool decrement = false);
188 void increment_mask_and_jump(Address counter_addr,
189 int increment, int mask,
190 Register scratch, bool preloaded,
191 Condition cond, Label* where);
192 void set_mdp_flag_at(Register mdp_in, int flag_constant);
193 void test_mdp_data_at(Register mdp_in, int offset, Register value,
194 Register test_value_out,
195 Label& not_equal_continue);
196
197 void record_klass_in_profile(Register receiver, Register mdp,
198 Register reg2, bool is_virtual_call);
199 void record_klass_in_profile_helper(Register receiver, Register mdp,
200 Register reg2, int start_row,
201 Label& done, bool is_virtual_call);
202
203 void update_mdp_by_offset(Register mdp_in, int offset_of_offset);
204 void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp);
205 void update_mdp_by_constant(Register mdp_in, int constant);
206 void update_mdp_for_ret(Register return_bci);
207
208 void profile_taken_branch(Register mdp, Register bumped_count);
209 void profile_not_taken_branch(Register mdp);
210 void profile_call(Register mdp);
211 void profile_final_call(Register mdp);
212 void profile_virtual_call(Register receiver, Register mdp, Register scratch2,
213 bool receiver_can_be_null = false);
214 void profile_ret(Register return_bci, Register mdp);
215 void profile_null_seen(Register mdp);
216 void profile_typecheck(Register mdp, Register klass, Register scratch);
217 void profile_typecheck_failed(Register mdp);
218 void profile_switch_default(Register mdp);
219 void profile_switch_case(Register index_in_scratch, Register mdp, Register scratch2);
220
221 #endif /* !CC_INTERP */
222
223 typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;
224
225 // support for jvmti
226 void notify_method_entry();
227 void notify_method_exit(TosState state, NotifyMethodExitMode mode);
228
229 };