1 /*
2 * Copyright (c) 1997, 2019, 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_INTERP_MASM_X86_HPP
26 #define CPU_X86_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:
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
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, Register tmp = rscratch2);
125
126 // load cpool->resolved_klass_at(index)
127 void load_resolved_klass_at_index(Register klass, // contains the Klass on return
128 Register cpool, // the constant pool (corrupted on return)
129 Register index); // the constant pool index (corrupted on return)
130
131 void load_resolved_method_at_index(int byte_no,
132 Register method,
133 Register cache,
134 Register index);
135
136 NOT_LP64(void f2ieee();) // truncate ftos to 32bits
137 NOT_LP64(void d2ieee();) // truncate dtos to 64bits
138
139 // Expression stack
140 void pop_ptr(Register r = rax);
141 void pop_i(Register r = rax);
142 void push_ptr(Register r = rax);
143 void push_i(Register r = rax);
144
145 void push_f(XMMRegister r);
146 void pop_f(XMMRegister r);
147 void pop_d(XMMRegister r);
148 void push_d(XMMRegister r);
149 #ifdef _LP64
150 void pop_l(Register r = rax);
151 void push_l(Register r = rax);
152 #else
153 void pop_l(Register lo = rax, Register hi = rdx);
154 void pop_f();
155 void pop_d();
156
157 void push_l(Register lo = rax, Register hi = rdx);
158 void push_d();
159 void push_f();
160 #endif // _LP64
161
162 void pop(Register r) { ((MacroAssembler*)this)->pop(r); }
163 void push(Register r) { ((MacroAssembler*)this)->push(r); }
164 void push(int32_t imm ) { ((MacroAssembler*)this)->push(imm); }
165
166 void pop(TosState state); // transition vtos -> state
167 void push(TosState state); // transition state -> vtos
168
169 // These are dummies to prevent surprise implicit conversions to Register
170 void pop(void* v); // Add unimplemented ambiguous method
171 void push(void* v); // Add unimplemented ambiguous method
172
173 void empty_expression_stack() {
174 movptr(rsp, Address(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize));
175 // NULL last_sp until next java call
176 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
177 NOT_LP64(empty_FPU_stack());
178 }
179
180 // Helpers for swap and dup
181 void load_ptr(int n, Register val);
182 void store_ptr(int n, Register val);
183
184 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
185 // a subtype of super_klass.
186 void gen_subtype_check(Register sub_klass, Label &ok_is_subtype, bool profile = true);
187
188 // Dispatching
189 void dispatch_prolog(TosState state, int step = 0);
190 void dispatch_epilog(TosState state, int step = 0);
191 // dispatch via rbx (assume rbx is loaded already)
192 void dispatch_only(TosState state, bool generate_poll = false);
193 // dispatch normal table via rbx (assume rbx is loaded already)
194 void dispatch_only_normal(TosState state);
195 void dispatch_only_noverify(TosState state);
196 // load rbx from [_bcp_register + step] and dispatch via rbx
197 void dispatch_next(TosState state, int step = 0, bool generate_poll = false);
198 // load rbx from [_bcp_register] and dispatch via rbx and table
199 void dispatch_via (TosState state, address* table);
200
201 // jump to an invoked target
202 void prepare_to_jump_from_interpreted();
203 void jump_from_interpreted(Register method, Register temp);
204
205 // narrow int return value
206 void narrow(Register result);
207
208 // Returning from interpreted functions
209 //
210 // Removes the current activation (incl. unlocking of monitors)
211 // and sets up the return address. This code is also used for
212 // exception unwindwing. In that case, we do not want to throw
213 // IllegalMonitorStateExceptions, since that might get us into an
214 // infinite rethrow exception loop.
215 // Additionally this code is used for popFrame and earlyReturn.
216 // In popFrame case we want to skip throwing an exception,
217 // installing an exception, and notifying jvmdi.
218 // In earlyReturn case we only want to skip throwing an exception
219 // and installing an exception.
220 void remove_activation(TosState state, Register ret_addr,
221 bool throw_monitor_exception = true,
222 bool install_monitor_exception = true,
223 bool notify_jvmdi = true);
224 void get_method_counters(Register method, Register mcs, Label& skip);
225
226 // Kills t1 and t2, perserves klass, return allocation in new_obj
227 void allocate_instance(Register klass, Register new_obj,
228 Register t1, Register t2,
229 bool clear_fields, Label& alloc_failed);
230 // Allocate value buffer in "obj" and read in flattened field
231 // NOTES:
232 // - input holder object via "obj", which must be rax,
233 // will return new value buffer obj via the same reg
234 // - assumes holder_klass and valueKlass field klass have both been resolved
235 // - 32 bits: kills rdi and rsi
236 void read_flattened_field(Register holder_klass,
237 Register field_index, Register field_offset,
238 Register obj = rax);
239
240 // Allocate value buffer in "obj" and read in flattened element at the given index
241 // NOTES:
242 // - Return via "obj" must be rax
243 // - kills all given regs
244 // - 32 bits: kills rdi and rsi
245 void read_flattened_element(Register array, Register index,
246 Register t1, Register t2,
247 Register obj = rax);
248
249 // Object locking
250 void lock_object (Register lock_reg);
251 void unlock_object(Register lock_reg);
252
253 // Interpreter profiling operations
254 void set_method_data_pointer_for_bcp();
255 void test_method_data_pointer(Register mdp, Label& zero_continue);
256 void verify_method_data_pointer();
257
258 void set_mdp_data_at(Register mdp_in, int constant, Register value);
259 void increment_mdp_data_at(Address data, bool decrement = false);
260 void increment_mdp_data_at(Register mdp_in, int constant,
261 bool decrement = false);
262 void increment_mdp_data_at(Register mdp_in, Register reg, int constant,
263 bool decrement = false);
264 void increment_mask_and_jump(Address counter_addr,
265 int increment, Address mask,
266 Register scratch, bool preloaded,
267 Condition cond, Label* where);
268 void set_mdp_flag_at(Register mdp_in, int flag_constant);
269 void test_mdp_data_at(Register mdp_in, int offset, Register value,
270 Register test_value_out,
271 Label& not_equal_continue);
272
273 void record_klass_in_profile(Register receiver, Register mdp,
274 Register reg2, bool is_virtual_call);
275 void record_klass_in_profile_helper(Register receiver, Register mdp,
276 Register reg2, int start_row,
277 Label& done, bool is_virtual_call);
278 void record_item_in_profile_helper(Register item, Register mdp,
279 Register reg2, int start_row, Label& done, int total_rows,
280 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
281 int non_profiled_offset);
282
283 void update_mdp_by_offset(Register mdp_in, int offset_of_offset);
284 void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp);
285 void update_mdp_by_constant(Register mdp_in, int constant);
286 void update_mdp_for_ret(Register return_bci);
287
288 void profile_taken_branch(Register mdp, Register bumped_count);
289 void profile_not_taken_branch(Register mdp);
290 void profile_call(Register mdp);
291 void profile_final_call(Register mdp);
292 void profile_virtual_call(Register receiver, Register mdp,
293 Register scratch2,
294 bool receiver_can_be_null = false);
295 void profile_called_method(Register method, Register mdp, Register reg2) NOT_JVMCI_RETURN;
296 void profile_ret(Register return_bci, Register mdp);
297 void profile_null_seen(Register mdp);
298 void profile_typecheck(Register mdp, Register klass, Register scratch);
299 void profile_typecheck_failed(Register mdp);
300 void profile_switch_default(Register mdp);
301 void profile_switch_case(Register index_in_scratch, Register mdp,
302 Register scratch2);
303 void profile_array(Register mdp, Register array, Register tmp);
304 void profile_element(Register mdp, Register element, Register tmp);
305
306 // Debugging
307 // only if +VerifyOops && state == atos
308 void verify_oop(Register reg, TosState state = atos);
309 // only if +VerifyFPU && (state == ftos || state == dtos)
310 void verify_FPU(int stack_depth, TosState state = ftos);
311
312 typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;
313
314 // support for jvmti/dtrace
315 void notify_method_entry();
316 void notify_method_exit(TosState state, NotifyMethodExitMode mode);
317
318 private:
319
320 Register _locals_register; // register that contains the pointer to the locals
321 Register _bcp_register; // register that contains the bcp
322
323 public:
324 void profile_obj_type(Register obj, const Address& mdo_addr);
325 void profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual);
326 void profile_return_type(Register mdp, Register ret, Register tmp);
327 void profile_parameters_type(Register mdp, Register tmp1, Register tmp2);
328
329 };
330
331 #endif // CPU_X86_INTERP_MASM_X86_HPP