1 /*
2 * Copyright (c) 1997, 2015, 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 "asm/macroAssembler.inline.hpp"
30 #include "interpreter/invocationCounter.hpp"
31 #include "runtime/frame.hpp"
32
33 // This file specializes the assember with interpreter-specific macros
34
35 typedef ByteSize (*OffsetFunction)(uint);
36
37 class InterpreterMacroAssembler: public MacroAssembler {
38
39 protected:
40 // Interpreter specific version of call_VM_base
41 virtual void call_VM_leaf_base(address entry_point,
42 int number_of_arguments);
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 virtual void check_and_handle_popframe(Register java_thread);
52 virtual void check_and_handle_earlyret(Register java_thread);
53
54 // base routine for all dispatches
55 void dispatch_base(TosState state, address* table, bool verifyoop = true);
56
57 public:
58 InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code),
59 _locals_register(LP64_ONLY(r14) NOT_LP64(rdi)),
60 _bcp_register(LP64_ONLY(r13) NOT_LP64(rsi)) {}
61
62 void jump_to_entry(address entry);
63
64 void load_earlyret_value(TosState state);
65
66 // Interpreter-specific registers
67 void save_bcp() {
68 movptr(Address(rbp, frame::interpreter_frame_bcp_offset * wordSize), _bcp_register);
69 }
70
71 void restore_bcp() {
72 movptr(_bcp_register, Address(rbp, frame::interpreter_frame_bcp_offset * wordSize));
73 }
74
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
80 void get_method(Register reg) {
81 movptr(reg, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
82 }
83
84 void get_const(Register reg) {
85 get_method(reg);
86 movptr(reg, Address(reg, Method::const_offset()));
87 }
88
89 void get_constant_pool(Register reg) {
90 get_const(reg);
91 movptr(reg, Address(reg, ConstMethod::constants_offset()));
92 }
93
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
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);
125
126 NOT_LP64(void f2ieee();) // truncate ftos to 32bits
127 NOT_LP64(void d2ieee();) // truncate dtos to 64bits
128
129 // Expression stack
130 void pop_ptr(Register r = rax);
131 void pop_i(Register r = rax);
132 void push_ptr(Register r = rax);
133 void push_i(Register r = rax);
134
135 void push_f(XMMRegister r);
136 void pop_f(XMMRegister r);
137 void pop_d(XMMRegister r);
138 void push_d(XMMRegister r);
139 #ifdef _LP64
140 void pop_l(Register r = rax);
141 void push_l(Register r = rax);
142 #else
143 void pop_l(Register lo = rax, Register hi = rdx);
144 void pop_f();
145 void pop_d();
146
147 void push_l(Register lo = rax, Register hi = rdx);
148 void push_d();
149 void push_f();
150 #endif // _LP64
151
152 void pop(Register r) { ((MacroAssembler*)this)->pop(r); }
153 void push(Register r) { ((MacroAssembler*)this)->push(r); }
154 void push(int32_t imm ) { ((MacroAssembler*)this)->push(imm); }
155
156 void pop(TosState state); // transition vtos -> state
157 void push(TosState state); // transition state -> vtos
158
159 // These are dummies to prevent surprise implicit conversions to Register
160 void pop(void* v); // Add unimplemented ambiguous method
161 void push(void* v); // Add unimplemented ambiguous method
162
163 void empty_expression_stack() {
164 movptr(rsp, Address(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize));
165 // NULL last_sp until next java call
166 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
167 NOT_LP64(empty_FPU_stack());
168 }
169
170 // Helpers for swap and dup
171 void load_ptr(int n, Register val);
172 void store_ptr(int n, Register val);
173
174 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
175 // a subtype of super_klass.
176 void gen_subtype_check( Register sub_klass, Label &ok_is_subtype );
177
178 // Dispatching
179 void dispatch_prolog(TosState state, int step = 0);
180 void dispatch_epilog(TosState state, int step = 0);
181 // dispatch via rbx (assume rbx is loaded already)
182 void dispatch_only(TosState state);
183 // dispatch normal table via rbx (assume rbx is loaded already)
184 void dispatch_only_normal(TosState state);
185 void dispatch_only_noverify(TosState state);
186 // load rbx from [_bcp_register + step] and dispatch via rbx
187 void dispatch_next(TosState state, int step = 0);
188 // load rbx from [_bcp_register] and dispatch via rbx and table
189 void dispatch_via (TosState state, address* table);
190
191 // jump to an invoked target
192 void prepare_to_jump_from_interpreted();
193 void jump_from_interpreted(Register method, Register temp);
194
195 // Returning from interpreted functions
196 //
197 // Removes the current activation (incl. unlocking of monitors)
198 // and sets up the return address. This code is also used for
199 // exception unwindwing. In that case, we do not want to throw
200 // IllegalMonitorStateExceptions, since that might get us into an
201 // infinite rethrow exception loop.
202 // Additionally this code is used for popFrame and earlyReturn.
203 // In popFrame case we want to skip throwing an exception,
204 // installing an exception, and notifying jvmdi.
205 // In earlyReturn case we only want to skip throwing an exception
206 // and installing an exception.
207 void remove_activation(TosState state, Register ret_addr,
208 bool throw_monitor_exception = true,
209 bool install_monitor_exception = true,
210 bool notify_jvmdi = true);
211 void get_method_counters(Register method, Register mcs, Label& skip);
212
213 // Object locking
214 void lock_object (Register lock_reg);
215 void unlock_object(Register lock_reg);
216
217 // Interpreter profiling operations
218 void set_method_data_pointer_for_bcp();
219 void test_method_data_pointer(Register mdp, Label& zero_continue);
220 void verify_method_data_pointer();
221
222 void set_mdp_data_at(Register mdp_in, int constant, Register value);
223 void increment_mdp_data_at(Address data, bool decrement = false);
224 void increment_mdp_data_at(Register mdp_in, int constant,
225 bool decrement = false);
226 void increment_mdp_data_at(Register mdp_in, Register reg, int constant,
227 bool decrement = false);
228 void increment_mask_and_jump(Address counter_addr,
229 int increment, Address mask,
230 Register scratch, bool preloaded,
231 Condition cond, Label* where);
232 void set_mdp_flag_at(Register mdp_in, int flag_constant);
233 void test_mdp_data_at(Register mdp_in, int offset, Register value,
234 Register test_value_out,
235 Label& not_equal_continue);
236
237 void record_klass_in_profile(Register receiver, Register mdp,
238 Register reg2, bool is_virtual_call);
239 void record_klass_in_profile_helper(Register receiver, Register mdp,
240 Register reg2, int start_row,
241 Label& done, bool is_virtual_call);
242 void record_item_in_profile_helper(Register item, Register mdp,
243 Register reg2, int start_row, Label& done, int total_rows,
244 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
245 int non_profiled_offset);
246
247 void update_mdp_by_offset(Register mdp_in, int offset_of_offset);
248 void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp);
249 void update_mdp_by_constant(Register mdp_in, int constant);
250 void update_mdp_for_ret(Register return_bci);
251
252 void profile_taken_branch(Register mdp, Register bumped_count);
253 void profile_not_taken_branch(Register mdp);
254 void profile_call(Register mdp);
255 void profile_final_call(Register mdp);
256 void profile_virtual_call(Register receiver, Register mdp,
257 Register scratch2,
258 bool receiver_can_be_null = false);
259 void profile_called_method(Register method, Register mdp, Register reg2) NOT_JVMCI_RETURN;
260 void profile_ret(Register return_bci, Register mdp);
261 void profile_null_seen(Register mdp);
262 void profile_typecheck(Register mdp, Register klass, Register scratch);
263 void profile_typecheck_failed(Register mdp);
264 void profile_switch_default(Register mdp);
265 void profile_switch_case(Register index_in_scratch, Register mdp,
266 Register scratch2);
267
268 // Debugging
269 // only if +VerifyOops && state == atos
270 void verify_oop(Register reg, TosState state = atos);
271 // only if +VerifyFPU && (state == ftos || state == dtos)
272 void verify_FPU(int stack_depth, TosState state = ftos);
273
274 typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;
275
276 // support for jvmti/dtrace
277 void notify_method_entry();
278 void notify_method_exit(TosState state, NotifyMethodExitMode mode);
279
280 private:
281
282 Register _locals_register; // register that contains the pointer to the locals
283 Register _bcp_register; // register that contains the bcp
284
285 public:
286 void profile_obj_type(Register obj, const Address& mdo_addr);
287 void profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual);
288 void profile_return_type(Register mdp, Register ret, Register tmp);
289 void profile_parameters_type(Register mdp, Register tmp1, Register tmp2);
290
291 };
292
293 #endif // CPU_X86_VM_INTERP_MASM_X86_HPP