1 /*
2 * Copyright (c) 2003, 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(address entry_point,
33 int number_of_arguments);
34
35 virtual void call_VM_base(Register oop_result,
36 Register java_thread,
37 Register last_java_sp,
38 address entry_point,
39 int number_of_arguments,
40 bool check_exceptions);
41
42 virtual void check_and_handle_popframe(Register java_thread);
43 virtual void check_and_handle_earlyret(Register java_thread);
44
45 // base routine for all dispatches
46 void dispatch_base(TosState state, address* table, bool verifyoop = true);
47 #endif // CC_INTERP
48
49 public:
50 InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code) {}
51
52 void load_earlyret_value(TosState state);
53
54 #ifdef CC_INTERP
55 void save_bcp() { /* not needed in c++ interpreter and harmless */ }
56 void restore_bcp() { /* not needed in c++ interpreter and harmless */ }
57
58 // Helpers for runtime call arguments/results
59 void get_method(Register reg);
60
61 #else
62
63 // Interpreter-specific registers
64 void save_bcp() {
65 movptr(Address(rbp, frame::interpreter_frame_bcx_offset * wordSize), r13);
66 }
67
68 void restore_bcp() {
69 movptr(r13, Address(rbp, frame::interpreter_frame_bcx_offset * wordSize));
70 }
71
72 void restore_locals() {
73 movptr(r14, Address(rbp, frame::interpreter_frame_locals_offset * wordSize));
74 }
75
76 // Helpers for runtime call arguments/results
77 void get_method(Register reg) {
78 movptr(reg, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
79 }
80
81 void get_constant_pool(Register reg) {
82 get_method(reg);
83 movptr(reg, Address(reg, methodOopDesc::constants_offset()));
84 }
85
86 void get_constant_pool_cache(Register reg) {
87 get_constant_pool(reg);
88 movptr(reg, Address(reg, constantPoolOopDesc::cache_offset_in_bytes()));
89 }
90
91 void get_cpool_and_tags(Register cpool, Register tags) {
92 get_constant_pool(cpool);
93 movptr(tags, Address(cpool, constantPoolOopDesc::tags_offset_in_bytes()));
94 }
95
96 void get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset);
97 void get_cache_and_index_at_bcp(Register cache, Register index,
98 int bcp_offset, size_t index_size = sizeof(u2));
99 void get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
100 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
104 void pop_ptr(Register r = rax);
105 void pop_i(Register r = rax);
106 void pop_l(Register r = rax);
107 void pop_f(XMMRegister r = xmm0);
108 void pop_d(XMMRegister r = xmm0);
109 void push_ptr(Register r = rax);
110 void push_i(Register r = rax);
111 void push_l(Register r = rax);
112 void push_f(XMMRegister r = xmm0);
113 void push_d(XMMRegister r = xmm0);
114
115 void pop(Register r ) { ((MacroAssembler*)this)->pop(r); }
116
117 void push(Register r ) { ((MacroAssembler*)this)->push(r); }
118 void push(int32_t imm ) { ((MacroAssembler*)this)->push(imm); }
119
120 void pop(TosState state); // transition vtos -> state
121 void push(TosState state); // transition state -> vtos
122
123 void empty_expression_stack() {
124 movptr(rsp, Address(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize));
125 // NULL last_sp until next java call
126 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
127 }
128
129 // Helpers for swap and dup
130 void load_ptr(int n, Register val);
131 void store_ptr(int n, Register val);
132
133 // Super call_VM calls - correspond to MacroAssembler::call_VM(_leaf) calls
134 void super_call_VM_leaf(address entry_point);
135 void super_call_VM_leaf(address entry_point, Register arg_1);
136 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2);
137 void super_call_VM_leaf(address entry_point,
138 Register arg_1, Register arg_2, Register arg_3);
139
140 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
141 // a subtype of super_klass.
142 void gen_subtype_check( Register sub_klass, Label &ok_is_subtype );
143
144 // Dispatching
145 void dispatch_prolog(TosState state, int step = 0);
146 void dispatch_epilog(TosState state, int step = 0);
147 // dispatch via ebx (assume ebx is loaded already)
148 void dispatch_only(TosState state);
149 // dispatch normal table via ebx (assume ebx is loaded already)
150 void dispatch_only_normal(TosState state);
151 void dispatch_only_noverify(TosState state);
152 // load ebx from [esi + step] and dispatch via ebx
153 void dispatch_next(TosState state, int step = 0);
154 // load ebx from [esi] and dispatch via ebx and table
155 void dispatch_via (TosState state, address* table);
156
157 // jump to an invoked target
158 void prepare_to_jump_from_interpreted();
159 void jump_from_interpreted(Register method, Register temp);
160
161
162 // Returning from interpreted functions
163 //
164 // Removes the current activation (incl. unlocking of monitors)
165 // and sets up the return address. This code is also used for
166 // exception unwindwing. In that case, we do not want to throw
167 // IllegalMonitorStateExceptions, since that might get us into an
168 // infinite rethrow exception loop.
169 // Additionally this code is used for popFrame and earlyReturn.
170 // In popFrame case we want to skip throwing an exception,
171 // installing an exception, and notifying jvmdi.
172 // In earlyReturn case we only want to skip throwing an exception
173 // and installing an exception.
174 void remove_activation(TosState state, Register ret_addr,
175 bool throw_monitor_exception = true,
176 bool install_monitor_exception = true,
177 bool notify_jvmdi = true);
178 #endif // CC_INTERP
179
180 // Object locking
181 void lock_object (Register lock_reg);
182 void unlock_object(Register lock_reg);
183
184 #ifndef CC_INTERP
185
186 // Interpreter profiling operations
187 void set_method_data_pointer_for_bcp();
188 void test_method_data_pointer(Register mdp, Label& zero_continue);
189 void verify_method_data_pointer();
190
191 void set_mdp_data_at(Register mdp_in, int constant, Register value);
192 void increment_mdp_data_at(Address data, bool decrement = false);
193 void increment_mdp_data_at(Register mdp_in, int constant,
194 bool decrement = false);
195 void increment_mdp_data_at(Register mdp_in, Register reg, int constant,
196 bool decrement = false);
197 void increment_mask_and_jump(Address counter_addr,
198 int increment, int mask,
199 Register scratch, bool preloaded,
200 Condition cond, Label* where);
201 void set_mdp_flag_at(Register mdp_in, int flag_constant);
202 void test_mdp_data_at(Register mdp_in, int offset, Register value,
203 Register test_value_out,
204 Label& not_equal_continue);
205
206 void record_klass_in_profile(Register receiver, Register mdp,
207 Register reg2, bool is_virtual_call);
208 void record_klass_in_profile_helper(Register receiver, Register mdp,
209 Register reg2, int start_row,
210 Label& done, bool is_virtual_call);
211
212 void update_mdp_by_offset(Register mdp_in, int offset_of_offset);
213 void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp);
214 void update_mdp_by_constant(Register mdp_in, int constant);
215 void update_mdp_for_ret(Register return_bci);
216
217 void profile_taken_branch(Register mdp, Register bumped_count);
218 void profile_not_taken_branch(Register mdp);
219 void profile_call(Register mdp);
220 void profile_final_call(Register mdp);
221 void profile_virtual_call(Register receiver, Register mdp,
222 Register scratch2,
223 bool receiver_can_be_null = false);
224 void profile_ret(Register return_bci, Register mdp);
225 void profile_null_seen(Register mdp);
226 void profile_typecheck(Register mdp, Register klass, Register scratch);
227 void profile_typecheck_failed(Register mdp);
228 void profile_switch_default(Register mdp);
229 void profile_switch_case(Register index_in_scratch, Register mdp,
230 Register scratch2);
231
232 // Debugging
233 // only if +VerifyOops && state == atos
234 void verify_oop(Register reg, TosState state = atos);
235 // only if +VerifyFPU && (state == ftos || state == dtos)
236 void verify_FPU(int stack_depth, TosState state = ftos);
237
238 #endif // !CC_INTERP
239
240 typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;
241
242 // support for jvmti/dtrace
243 void notify_method_entry();
244 void notify_method_exit(TosState state, NotifyMethodExitMode mode);
245 };