30 |
30 |
31 #define __ _masm-> |
31 #define __ _masm-> |
32 |
32 |
33 #ifdef PRODUCT |
33 #ifdef PRODUCT |
34 #define BLOCK_COMMENT(str) /* nothing */ |
34 #define BLOCK_COMMENT(str) /* nothing */ |
|
35 #define STOP(error) stop(error) |
35 #else |
36 #else |
36 #define BLOCK_COMMENT(str) __ block_comment(str) |
37 #define BLOCK_COMMENT(str) __ block_comment(str) |
|
38 #define STOP(error) block_comment(error); __ stop(error) |
37 #endif |
39 #endif |
38 |
40 |
39 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") |
41 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") |
40 |
42 |
41 // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant. |
43 // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant. |
42 static RegisterOrConstant constant(int value) { |
44 static RegisterOrConstant constant(int value) { |
43 return RegisterOrConstant(value); |
45 return RegisterOrConstant(value); |
44 } |
46 } |
45 |
47 |
46 address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm, |
|
47 address interpreted_entry) { |
|
48 // Just before the actual machine code entry point, allocate space |
|
49 // for a MethodHandleEntry::Data record, so that we can manage everything |
|
50 // from one base pointer. |
|
51 __ align(wordSize); |
|
52 address target = __ pc() + sizeof(Data); |
|
53 while (__ pc() < target) { |
|
54 __ nop(); |
|
55 __ align(wordSize); |
|
56 } |
|
57 |
|
58 MethodHandleEntry* me = (MethodHandleEntry*) __ pc(); |
|
59 me->set_end_address(__ pc()); // set a temporary end_address |
|
60 me->set_from_interpreted_entry(interpreted_entry); |
|
61 me->set_type_checking_entry(NULL); |
|
62 |
|
63 return (address) me; |
|
64 } |
|
65 |
|
66 MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm, |
|
67 address start_addr) { |
|
68 MethodHandleEntry* me = (MethodHandleEntry*) start_addr; |
|
69 assert(me->end_address() == start_addr, "valid ME"); |
|
70 |
|
71 // Fill in the real end_address: |
|
72 __ align(wordSize); |
|
73 me->set_end_address(__ pc()); |
|
74 |
|
75 return me; |
|
76 } |
|
77 |
|
78 // stack walking support |
|
79 |
|
80 frame MethodHandles::ricochet_frame_sender(const frame& fr, RegisterMap *map) { |
|
81 RicochetFrame* f = RicochetFrame::from_frame(fr); |
|
82 if (map->update_map()) |
|
83 frame::update_map_with_saved_link(map, &f->_sender_link); |
|
84 return frame(f->extended_sender_sp(), f->exact_sender_sp(), f->sender_link(), f->sender_pc()); |
|
85 } |
|
86 |
|
87 void MethodHandles::ricochet_frame_oops_do(const frame& fr, OopClosure* blk, const RegisterMap* reg_map) { |
|
88 RicochetFrame* f = RicochetFrame::from_frame(fr); |
|
89 |
|
90 // pick up the argument type descriptor: |
|
91 Thread* thread = Thread::current(); |
|
92 Handle cookie(thread, f->compute_saved_args_layout(true, true)); |
|
93 |
|
94 // process fixed part |
|
95 blk->do_oop((oop*)f->saved_target_addr()); |
|
96 blk->do_oop((oop*)f->saved_args_layout_addr()); |
|
97 |
|
98 // process variable arguments: |
|
99 if (cookie.is_null()) return; // no arguments to describe |
|
100 |
|
101 // the cookie is actually the invokeExact method for my target |
|
102 // his argument signature is what I'm interested in |
|
103 assert(cookie->is_method(), ""); |
|
104 methodHandle invoker(thread, methodOop(cookie())); |
|
105 assert(invoker->name() == vmSymbols::invokeExact_name(), "must be this kind of method"); |
|
106 assert(!invoker->is_static(), "must have MH argument"); |
|
107 int slot_count = invoker->size_of_parameters(); |
|
108 assert(slot_count >= 1, "must include 'this'"); |
|
109 intptr_t* base = f->saved_args_base(); |
|
110 intptr_t* retval = NULL; |
|
111 if (f->has_return_value_slot()) |
|
112 retval = f->return_value_slot_addr(); |
|
113 int slot_num = slot_count; |
|
114 intptr_t* loc = &base[slot_num -= 1]; |
|
115 //blk->do_oop((oop*) loc); // original target, which is irrelevant |
|
116 int arg_num = 0; |
|
117 for (SignatureStream ss(invoker->signature()); !ss.is_done(); ss.next()) { |
|
118 if (ss.at_return_type()) continue; |
|
119 BasicType ptype = ss.type(); |
|
120 if (ptype == T_ARRAY) ptype = T_OBJECT; // fold all refs to T_OBJECT |
|
121 assert(ptype >= T_BOOLEAN && ptype <= T_OBJECT, "not array or void"); |
|
122 loc = &base[slot_num -= type2size[ptype]]; |
|
123 bool is_oop = (ptype == T_OBJECT && loc != retval); |
|
124 if (is_oop) blk->do_oop((oop*)loc); |
|
125 arg_num += 1; |
|
126 } |
|
127 assert(slot_num == 0, "must have processed all the arguments"); |
|
128 } |
|
129 |
|
130 oop MethodHandles::RicochetFrame::compute_saved_args_layout(bool read_cache, bool write_cache) { |
|
131 oop cookie = NULL; |
|
132 if (read_cache) { |
|
133 cookie = saved_args_layout(); |
|
134 if (cookie != NULL) return cookie; |
|
135 } |
|
136 oop target = saved_target(); |
|
137 oop mtype = java_lang_invoke_MethodHandle::type(target); |
|
138 oop mtform = java_lang_invoke_MethodType::form(mtype); |
|
139 cookie = java_lang_invoke_MethodTypeForm::vmlayout(mtform); |
|
140 if (write_cache) { |
|
141 (*saved_args_layout_addr()) = cookie; |
|
142 } |
|
143 return cookie; |
|
144 } |
|
145 |
|
146 void MethodHandles::RicochetFrame::generate_ricochet_blob(MacroAssembler* _masm, |
|
147 // output params: |
|
148 int* bounce_offset, |
|
149 int* exception_offset, |
|
150 int* frame_size_in_words) { |
|
151 (*frame_size_in_words) = RicochetFrame::frame_size_in_bytes() / wordSize; |
|
152 |
|
153 address start = __ pc(); |
|
154 |
|
155 #ifdef ASSERT |
|
156 __ hlt(); __ hlt(); __ hlt(); |
|
157 // here's a hint of something special: |
|
158 __ push(MAGIC_NUMBER_1); |
|
159 __ push(MAGIC_NUMBER_2); |
|
160 #endif //ASSERT |
|
161 __ hlt(); // not reached |
|
162 |
|
163 // A return PC has just been popped from the stack. |
|
164 // Return values are in registers. |
|
165 // The ebp points into the RicochetFrame, which contains |
|
166 // a cleanup continuation we must return to. |
|
167 |
|
168 (*bounce_offset) = __ pc() - start; |
|
169 BLOCK_COMMENT("ricochet_blob.bounce"); |
|
170 |
|
171 if (VerifyMethodHandles) RicochetFrame::verify_clean(_masm); |
|
172 trace_method_handle(_masm, "return/ricochet_blob.bounce"); |
|
173 |
|
174 __ jmp(frame_address(continuation_offset_in_bytes())); |
|
175 __ hlt(); |
|
176 DEBUG_ONLY(__ push(MAGIC_NUMBER_2)); |
|
177 |
|
178 (*exception_offset) = __ pc() - start; |
|
179 BLOCK_COMMENT("ricochet_blob.exception"); |
|
180 |
|
181 // compare this to Interpreter::rethrow_exception_entry, which is parallel code |
|
182 // for example, see TemplateInterpreterGenerator::generate_throw_exception |
|
183 // Live registers in: |
|
184 // rax: exception |
|
185 // rdx: return address/pc that threw exception (ignored, always equal to bounce addr) |
|
186 __ verify_oop(rax); |
|
187 |
|
188 // no need to empty_FPU_stack or reinit_heapbase, since caller frame will do the same if needed |
|
189 |
|
190 // Take down the frame. |
|
191 |
|
192 // Cf. InterpreterMacroAssembler::remove_activation. |
|
193 leave_ricochet_frame(_masm, /*rcx_recv=*/ noreg, |
|
194 saved_last_sp_register(), |
|
195 /*sender_pc_reg=*/ rdx); |
|
196 |
|
197 // In between activations - previous activation type unknown yet |
|
198 // compute continuation point - the continuation point expects the |
|
199 // following registers set up: |
|
200 // |
|
201 // rax: exception |
|
202 // rdx: return address/pc that threw exception |
|
203 // rsp: expression stack of caller |
|
204 // rbp: ebp of caller |
|
205 __ push(rax); // save exception |
|
206 __ push(rdx); // save return address |
|
207 Register thread_reg = LP64_ONLY(r15_thread) NOT_LP64(rdi); |
|
208 NOT_LP64(__ get_thread(thread_reg)); |
|
209 __ call_VM_leaf(CAST_FROM_FN_PTR(address, |
|
210 SharedRuntime::exception_handler_for_return_address), |
|
211 thread_reg, rdx); |
|
212 __ mov(rbx, rax); // save exception handler |
|
213 __ pop(rdx); // restore return address |
|
214 __ pop(rax); // restore exception |
|
215 __ jmp(rbx); // jump to exception |
|
216 // handler of caller |
|
217 } |
|
218 |
|
219 void MethodHandles::RicochetFrame::enter_ricochet_frame(MacroAssembler* _masm, |
|
220 Register rcx_recv, |
|
221 Register rax_argv, |
|
222 address return_handler, |
|
223 Register rbx_temp) { |
|
224 const Register saved_last_sp = saved_last_sp_register(); |
|
225 Address rcx_mh_vmtarget( rcx_recv, java_lang_invoke_MethodHandle::vmtarget_offset_in_bytes() ); |
|
226 Address rcx_amh_conversion( rcx_recv, java_lang_invoke_AdapterMethodHandle::conversion_offset_in_bytes() ); |
|
227 |
|
228 // Push the RicochetFrame a word at a time. |
|
229 // This creates something similar to an interpreter frame. |
|
230 // Cf. TemplateInterpreterGenerator::generate_fixed_frame. |
|
231 BLOCK_COMMENT("push RicochetFrame {"); |
|
232 DEBUG_ONLY(int rfo = (int) sizeof(RicochetFrame)); |
|
233 assert((rfo -= wordSize) == RicochetFrame::sender_pc_offset_in_bytes(), ""); |
|
234 #define RF_FIELD(push_value, name) \ |
|
235 { push_value; \ |
|
236 assert((rfo -= wordSize) == RicochetFrame::name##_offset_in_bytes(), ""); } |
|
237 RF_FIELD(__ push(rbp), sender_link); |
|
238 RF_FIELD(__ push(saved_last_sp), exact_sender_sp); // rsi/r13 |
|
239 RF_FIELD(__ pushptr(rcx_amh_conversion), conversion); |
|
240 RF_FIELD(__ push(rax_argv), saved_args_base); // can be updated if args are shifted |
|
241 RF_FIELD(__ push((int32_t) NULL_WORD), saved_args_layout); // cache for GC layout cookie |
|
242 if (UseCompressedOops) { |
|
243 __ load_heap_oop(rbx_temp, rcx_mh_vmtarget); |
|
244 RF_FIELD(__ push(rbx_temp), saved_target); |
|
245 } else { |
|
246 RF_FIELD(__ pushptr(rcx_mh_vmtarget), saved_target); |
|
247 } |
|
248 __ lea(rbx_temp, ExternalAddress(return_handler)); |
|
249 RF_FIELD(__ push(rbx_temp), continuation); |
|
250 #undef RF_FIELD |
|
251 assert(rfo == 0, "fully initialized the RicochetFrame"); |
|
252 // compute new frame pointer: |
|
253 __ lea(rbp, Address(rsp, RicochetFrame::sender_link_offset_in_bytes())); |
|
254 // Push guard word #1 in debug mode. |
|
255 DEBUG_ONLY(__ push((int32_t) RicochetFrame::MAGIC_NUMBER_1)); |
|
256 // For debugging, leave behind an indication of which stub built this frame. |
|
257 DEBUG_ONLY({ Label L; __ call(L, relocInfo::none); __ bind(L); }); |
|
258 BLOCK_COMMENT("} RicochetFrame"); |
|
259 } |
|
260 |
|
261 void MethodHandles::RicochetFrame::leave_ricochet_frame(MacroAssembler* _masm, |
|
262 Register rcx_recv, |
|
263 Register new_sp_reg, |
|
264 Register sender_pc_reg) { |
|
265 assert_different_registers(rcx_recv, new_sp_reg, sender_pc_reg); |
|
266 const Register saved_last_sp = saved_last_sp_register(); |
|
267 // Take down the frame. |
|
268 // Cf. InterpreterMacroAssembler::remove_activation. |
|
269 BLOCK_COMMENT("end_ricochet_frame {"); |
|
270 // TO DO: If (exact_sender_sp - extended_sender_sp) > THRESH, compact the frame down. |
|
271 // This will keep stack in bounds even with unlimited tailcalls, each with an adapter. |
|
272 if (rcx_recv->is_valid()) |
|
273 __ movptr(rcx_recv, RicochetFrame::frame_address(RicochetFrame::saved_target_offset_in_bytes())); |
|
274 __ movptr(sender_pc_reg, RicochetFrame::frame_address(RicochetFrame::sender_pc_offset_in_bytes())); |
|
275 __ movptr(saved_last_sp, RicochetFrame::frame_address(RicochetFrame::exact_sender_sp_offset_in_bytes())); |
|
276 __ movptr(rbp, RicochetFrame::frame_address(RicochetFrame::sender_link_offset_in_bytes())); |
|
277 __ mov(rsp, new_sp_reg); |
|
278 BLOCK_COMMENT("} end_ricochet_frame"); |
|
279 } |
|
280 |
|
281 // Emit code to verify that RBP is pointing at a valid ricochet frame. |
|
282 #ifndef PRODUCT |
|
283 enum { |
|
284 ARG_LIMIT = 255, SLOP = 4, |
|
285 // use this parameter for checking for garbage stack movements: |
|
286 UNREASONABLE_STACK_MOVE = (ARG_LIMIT + SLOP) |
|
287 // the slop defends against false alarms due to fencepost errors |
|
288 }; |
|
289 #endif |
|
290 |
|
291 #ifdef ASSERT |
|
292 void MethodHandles::RicochetFrame::verify_clean(MacroAssembler* _masm) { |
|
293 // The stack should look like this: |
|
294 // ... keep1 | dest=42 | keep2 | RF | magic | handler | magic | recursive args | |
|
295 // Check various invariants. |
|
296 verify_offsets(); |
|
297 |
|
298 Register rdi_temp = rdi; |
|
299 Register rcx_temp = rcx; |
|
300 { __ push(rdi_temp); __ push(rcx_temp); } |
|
301 #define UNPUSH_TEMPS \ |
|
302 { __ pop(rcx_temp); __ pop(rdi_temp); } |
|
303 |
|
304 Address magic_number_1_addr = RicochetFrame::frame_address(RicochetFrame::magic_number_1_offset_in_bytes()); |
|
305 Address magic_number_2_addr = RicochetFrame::frame_address(RicochetFrame::magic_number_2_offset_in_bytes()); |
|
306 Address continuation_addr = RicochetFrame::frame_address(RicochetFrame::continuation_offset_in_bytes()); |
|
307 Address conversion_addr = RicochetFrame::frame_address(RicochetFrame::conversion_offset_in_bytes()); |
|
308 Address saved_args_base_addr = RicochetFrame::frame_address(RicochetFrame::saved_args_base_offset_in_bytes()); |
|
309 |
|
310 Label L_bad, L_ok; |
|
311 BLOCK_COMMENT("verify_clean {"); |
|
312 // Magic numbers must check out: |
|
313 __ cmpptr(magic_number_1_addr, (int32_t) MAGIC_NUMBER_1); |
|
314 __ jcc(Assembler::notEqual, L_bad); |
|
315 __ cmpptr(magic_number_2_addr, (int32_t) MAGIC_NUMBER_2); |
|
316 __ jcc(Assembler::notEqual, L_bad); |
|
317 |
|
318 // Arguments pointer must look reasonable: |
|
319 __ movptr(rcx_temp, saved_args_base_addr); |
|
320 __ cmpptr(rcx_temp, rbp); |
|
321 __ jcc(Assembler::below, L_bad); |
|
322 __ subptr(rcx_temp, UNREASONABLE_STACK_MOVE * Interpreter::stackElementSize); |
|
323 __ cmpptr(rcx_temp, rbp); |
|
324 __ jcc(Assembler::above, L_bad); |
|
325 |
|
326 load_conversion_dest_type(_masm, rdi_temp, conversion_addr); |
|
327 __ cmpl(rdi_temp, T_VOID); |
|
328 __ jcc(Assembler::equal, L_ok); |
|
329 __ movptr(rcx_temp, saved_args_base_addr); |
|
330 load_conversion_vminfo(_masm, rdi_temp, conversion_addr); |
|
331 __ cmpptr(Address(rcx_temp, rdi_temp, Interpreter::stackElementScale()), |
|
332 (int32_t) RETURN_VALUE_PLACEHOLDER); |
|
333 __ jcc(Assembler::equal, L_ok); |
|
334 __ BIND(L_bad); |
|
335 UNPUSH_TEMPS; |
|
336 __ stop("damaged ricochet frame"); |
|
337 __ BIND(L_ok); |
|
338 UNPUSH_TEMPS; |
|
339 BLOCK_COMMENT("} verify_clean"); |
|
340 |
|
341 #undef UNPUSH_TEMPS |
|
342 |
|
343 } |
|
344 #endif //ASSERT |
|
345 |
|
346 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg) { |
48 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg) { |
347 if (VerifyMethodHandles) |
49 if (VerifyMethodHandles) |
348 verify_klass(_masm, klass_reg, SystemDictionaryHandles::Class_klass(), |
50 verify_klass(_masm, klass_reg, SystemDictionaryHandles::Class_klass(), |
349 "AMH argument is a Class"); |
51 "MH argument is a Class"); |
350 __ load_heap_oop(klass_reg, Address(klass_reg, java_lang_Class::klass_offset_in_bytes())); |
52 __ load_heap_oop(klass_reg, Address(klass_reg, java_lang_Class::klass_offset_in_bytes())); |
351 } |
53 } |
352 |
54 |
353 void MethodHandles::load_conversion_vminfo(MacroAssembler* _masm, Register reg, Address conversion_field_addr) { |
|
354 int bits = BitsPerByte; |
|
355 int offset = (CONV_VMINFO_SHIFT / bits); |
|
356 int shift = (CONV_VMINFO_SHIFT % bits); |
|
357 __ load_unsigned_byte(reg, conversion_field_addr.plus_disp(offset)); |
|
358 assert(CONV_VMINFO_MASK == right_n_bits(bits - shift), "else change type of previous load"); |
|
359 assert(shift == 0, "no shift needed"); |
|
360 } |
|
361 |
|
362 void MethodHandles::load_conversion_dest_type(MacroAssembler* _masm, Register reg, Address conversion_field_addr) { |
|
363 int bits = BitsPerByte; |
|
364 int offset = (CONV_DEST_TYPE_SHIFT / bits); |
|
365 int shift = (CONV_DEST_TYPE_SHIFT % bits); |
|
366 __ load_unsigned_byte(reg, conversion_field_addr.plus_disp(offset)); |
|
367 assert(CONV_TYPE_MASK == right_n_bits(bits - shift), "else change type of previous load"); |
|
368 __ shrl(reg, shift); |
|
369 DEBUG_ONLY(int conv_type_bits = (int) exact_log2(CONV_TYPE_MASK+1)); |
|
370 assert((shift + conv_type_bits) == bits, "left justified in byte"); |
|
371 } |
|
372 |
|
373 void MethodHandles::load_stack_move(MacroAssembler* _masm, |
|
374 Register rdi_stack_move, |
|
375 Register rcx_amh, |
|
376 bool might_be_negative) { |
|
377 BLOCK_COMMENT("load_stack_move {"); |
|
378 Address rcx_amh_conversion(rcx_amh, java_lang_invoke_AdapterMethodHandle::conversion_offset_in_bytes()); |
|
379 __ movl(rdi_stack_move, rcx_amh_conversion); |
|
380 __ sarl(rdi_stack_move, CONV_STACK_MOVE_SHIFT); |
|
381 #ifdef _LP64 |
|
382 if (might_be_negative) { |
|
383 // clean high bits of stack motion register (was loaded as an int) |
|
384 __ movslq(rdi_stack_move, rdi_stack_move); |
|
385 } |
|
386 #endif //_LP64 |
|
387 #ifdef ASSERT |
55 #ifdef ASSERT |
388 if (VerifyMethodHandles) { |
56 static int check_nonzero(const char* xname, int x) { |
389 Label L_ok, L_bad; |
57 assert(x != 0, err_msg("%s should be nonzero", xname)); |
390 int32_t stack_move_limit = 0x4000; // extra-large |
58 return x; |
391 __ cmpptr(rdi_stack_move, stack_move_limit); |
59 } |
392 __ jcc(Assembler::greaterEqual, L_bad); |
60 #define NONZERO(x) check_nonzero(#x, x) |
393 __ cmpptr(rdi_stack_move, -stack_move_limit); |
61 #else //ASSERT |
394 __ jcc(Assembler::greater, L_ok); |
62 #define NONZERO(x) (x) |
395 __ bind(L_bad); |
63 #endif //ASSERT |
396 __ stop("load_stack_move of garbage value"); |
|
397 __ BIND(L_ok); |
|
398 } |
|
399 #endif |
|
400 BLOCK_COMMENT("} load_stack_move"); |
|
401 } |
|
402 |
64 |
403 #ifdef ASSERT |
65 #ifdef ASSERT |
404 void MethodHandles::RicochetFrame::verify_offsets() { |
|
405 // Check compatibility of this struct with the more generally used offsets of class frame: |
|
406 int ebp_off = sender_link_offset_in_bytes(); // offset from struct base to local rbp value |
|
407 assert(ebp_off + wordSize*frame::interpreter_frame_method_offset == saved_args_base_offset_in_bytes(), ""); |
|
408 assert(ebp_off + wordSize*frame::interpreter_frame_last_sp_offset == conversion_offset_in_bytes(), ""); |
|
409 assert(ebp_off + wordSize*frame::interpreter_frame_sender_sp_offset == exact_sender_sp_offset_in_bytes(), ""); |
|
410 // These last two have to be exact: |
|
411 assert(ebp_off + wordSize*frame::link_offset == sender_link_offset_in_bytes(), ""); |
|
412 assert(ebp_off + wordSize*frame::return_addr_offset == sender_pc_offset_in_bytes(), ""); |
|
413 } |
|
414 |
|
415 void MethodHandles::RicochetFrame::verify() const { |
|
416 verify_offsets(); |
|
417 assert(magic_number_1() == MAGIC_NUMBER_1, err_msg(PTR_FORMAT " == " PTR_FORMAT, magic_number_1(), MAGIC_NUMBER_1)); |
|
418 assert(magic_number_2() == MAGIC_NUMBER_2, err_msg(PTR_FORMAT " == " PTR_FORMAT, magic_number_2(), MAGIC_NUMBER_2)); |
|
419 if (!Universe::heap()->is_gc_active()) { |
|
420 if (saved_args_layout() != NULL) { |
|
421 assert(saved_args_layout()->is_method(), "must be valid oop"); |
|
422 } |
|
423 if (saved_target() != NULL) { |
|
424 assert(java_lang_invoke_MethodHandle::is_instance(saved_target()), "checking frame value"); |
|
425 } |
|
426 } |
|
427 int conv_op = adapter_conversion_op(conversion()); |
|
428 assert(conv_op == java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS || |
|
429 conv_op == java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS || |
|
430 conv_op == java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF, |
|
431 "must be a sane conversion"); |
|
432 if (has_return_value_slot()) { |
|
433 assert(*return_value_slot_addr() == RETURN_VALUE_PLACEHOLDER, ""); |
|
434 } |
|
435 } |
|
436 #endif //PRODUCT |
|
437 |
|
438 #ifdef ASSERT |
|
439 void MethodHandles::verify_argslot(MacroAssembler* _masm, |
|
440 Register argslot_reg, |
|
441 const char* error_message) { |
|
442 // Verify that argslot lies within (rsp, rbp]. |
|
443 Label L_ok, L_bad; |
|
444 BLOCK_COMMENT("verify_argslot {"); |
|
445 __ cmpptr(argslot_reg, rbp); |
|
446 __ jccb(Assembler::above, L_bad); |
|
447 __ cmpptr(rsp, argslot_reg); |
|
448 __ jccb(Assembler::below, L_ok); |
|
449 __ bind(L_bad); |
|
450 __ stop(error_message); |
|
451 __ BIND(L_ok); |
|
452 BLOCK_COMMENT("} verify_argslot"); |
|
453 } |
|
454 |
|
455 void MethodHandles::verify_argslots(MacroAssembler* _masm, |
|
456 RegisterOrConstant arg_slots, |
|
457 Register arg_slot_base_reg, |
|
458 bool negate_argslots, |
|
459 const char* error_message) { |
|
460 // Verify that [argslot..argslot+size) lies within (rsp, rbp). |
|
461 Label L_ok, L_bad; |
|
462 Register rdi_temp = rdi; |
|
463 BLOCK_COMMENT("verify_argslots {"); |
|
464 __ push(rdi_temp); |
|
465 if (negate_argslots) { |
|
466 if (arg_slots.is_constant()) { |
|
467 arg_slots = -1 * arg_slots.as_constant(); |
|
468 } else { |
|
469 __ movptr(rdi_temp, arg_slots); |
|
470 __ negptr(rdi_temp); |
|
471 arg_slots = rdi_temp; |
|
472 } |
|
473 } |
|
474 __ lea(rdi_temp, Address(arg_slot_base_reg, arg_slots, Interpreter::stackElementScale())); |
|
475 __ cmpptr(rdi_temp, rbp); |
|
476 __ pop(rdi_temp); |
|
477 __ jcc(Assembler::above, L_bad); |
|
478 __ cmpptr(rsp, arg_slot_base_reg); |
|
479 __ jcc(Assembler::below, L_ok); |
|
480 __ bind(L_bad); |
|
481 __ stop(error_message); |
|
482 __ BIND(L_ok); |
|
483 BLOCK_COMMENT("} verify_argslots"); |
|
484 } |
|
485 |
|
486 // Make sure that arg_slots has the same sign as the given direction. |
|
487 // If (and only if) arg_slots is a assembly-time constant, also allow it to be zero. |
|
488 void MethodHandles::verify_stack_move(MacroAssembler* _masm, |
|
489 RegisterOrConstant arg_slots, int direction) { |
|
490 bool allow_zero = arg_slots.is_constant(); |
|
491 if (direction == 0) { direction = +1; allow_zero = true; } |
|
492 assert(stack_move_unit() == -1, "else add extra checks here"); |
|
493 if (arg_slots.is_register()) { |
|
494 Label L_ok, L_bad; |
|
495 BLOCK_COMMENT("verify_stack_move {"); |
|
496 // testl(arg_slots.as_register(), -stack_move_unit() - 1); // no need |
|
497 // jcc(Assembler::notZero, L_bad); |
|
498 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD); |
|
499 if (direction > 0) { |
|
500 __ jcc(allow_zero ? Assembler::less : Assembler::lessEqual, L_bad); |
|
501 __ cmpptr(arg_slots.as_register(), (int32_t) UNREASONABLE_STACK_MOVE); |
|
502 __ jcc(Assembler::less, L_ok); |
|
503 } else { |
|
504 __ jcc(allow_zero ? Assembler::greater : Assembler::greaterEqual, L_bad); |
|
505 __ cmpptr(arg_slots.as_register(), (int32_t) -UNREASONABLE_STACK_MOVE); |
|
506 __ jcc(Assembler::greater, L_ok); |
|
507 } |
|
508 __ bind(L_bad); |
|
509 if (direction > 0) |
|
510 __ stop("assert arg_slots > 0"); |
|
511 else |
|
512 __ stop("assert arg_slots < 0"); |
|
513 __ BIND(L_ok); |
|
514 BLOCK_COMMENT("} verify_stack_move"); |
|
515 } else { |
|
516 intptr_t size = arg_slots.as_constant(); |
|
517 if (direction < 0) size = -size; |
|
518 assert(size >= 0, "correct direction of constant move"); |
|
519 assert(size < UNREASONABLE_STACK_MOVE, "reasonable size of constant move"); |
|
520 } |
|
521 } |
|
522 |
|
523 void MethodHandles::verify_klass(MacroAssembler* _masm, |
66 void MethodHandles::verify_klass(MacroAssembler* _masm, |
524 Register obj, KlassHandle klass, |
67 Register obj, KlassHandle klass, |
525 const char* error_message) { |
68 const char* error_message) { |
526 oop* klass_addr = klass.raw_value(); |
69 oop* klass_addr = klass.raw_value(); |
527 assert(klass_addr >= SystemDictionaryHandles::Object_klass().raw_value() && |
70 assert(klass_addr >= SystemDictionaryHandles::Object_klass().raw_value() && |
528 klass_addr <= SystemDictionaryHandles::Long_klass().raw_value(), |
71 klass_addr <= SystemDictionaryHandles::Long_klass().raw_value(), |
529 "must be one of the SystemDictionaryHandles"); |
72 "must be one of the SystemDictionaryHandles"); |
530 Register temp = rdi; |
73 Register temp = rdi; |
|
74 Register temp2 = noreg; |
|
75 LP64_ONLY(temp2 = rscratch1); // used by MacroAssembler::cmpptr |
531 Label L_ok, L_bad; |
76 Label L_ok, L_bad; |
532 BLOCK_COMMENT("verify_klass {"); |
77 BLOCK_COMMENT("verify_klass {"); |
533 __ verify_oop(obj); |
78 __ verify_oop(obj); |
534 __ testptr(obj, obj); |
79 __ testptr(obj, obj); |
535 __ jcc(Assembler::zero, L_bad); |
80 __ jcc(Assembler::zero, L_bad); |
536 __ push(temp); |
81 __ push(temp); if (temp2 != noreg) __ push(temp2); |
|
82 #define UNPUSH { if (temp2 != noreg) __ pop(temp2); __ pop(temp); } |
537 __ load_klass(temp, obj); |
83 __ load_klass(temp, obj); |
538 __ cmpptr(temp, ExternalAddress((address) klass_addr)); |
84 __ cmpptr(temp, ExternalAddress((address) klass_addr)); |
539 __ jcc(Assembler::equal, L_ok); |
85 __ jcc(Assembler::equal, L_ok); |
540 intptr_t super_check_offset = klass->super_check_offset(); |
86 intptr_t super_check_offset = klass->super_check_offset(); |
541 __ movptr(temp, Address(temp, super_check_offset)); |
87 __ movptr(temp, Address(temp, super_check_offset)); |
542 __ cmpptr(temp, ExternalAddress((address) klass_addr)); |
88 __ cmpptr(temp, ExternalAddress((address) klass_addr)); |
543 __ jcc(Assembler::equal, L_ok); |
89 __ jcc(Assembler::equal, L_ok); |
544 __ pop(temp); |
90 UNPUSH; |
545 __ bind(L_bad); |
91 __ bind(L_bad); |
546 __ stop(error_message); |
92 __ STOP(error_message); |
547 __ BIND(L_ok); |
93 __ BIND(L_ok); |
548 __ pop(temp); |
94 UNPUSH; |
549 BLOCK_COMMENT("} verify_klass"); |
95 BLOCK_COMMENT("} verify_klass"); |
550 } |
96 } |
|
97 |
|
98 void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) { |
|
99 Label L; |
|
100 BLOCK_COMMENT("verify_ref_kind {"); |
|
101 __ movl(temp, Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()))); |
|
102 __ shrl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); |
|
103 __ andl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); |
|
104 __ cmpl(temp, ref_kind); |
|
105 __ jcc(Assembler::equal, L); |
|
106 { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); |
|
107 jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); |
|
108 if (ref_kind == JVM_REF_invokeVirtual || |
|
109 ref_kind == JVM_REF_invokeSpecial) |
|
110 // could do this for all ref_kinds, but would explode assembly code size |
|
111 trace_method_handle(_masm, buf); |
|
112 __ STOP(buf); |
|
113 } |
|
114 BLOCK_COMMENT("} verify_ref_kind"); |
|
115 __ bind(L); |
|
116 } |
|
117 |
551 #endif //ASSERT |
118 #endif //ASSERT |
552 |
119 |
553 void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register temp) { |
120 void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register temp, |
554 if (JvmtiExport::can_post_interpreter_events()) { |
121 bool for_compiler_entry) { |
|
122 assert(method == rbx, "interpreter calling convention"); |
|
123 __ verify_oop(method); |
|
124 |
|
125 if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { |
555 Label run_compiled_code; |
126 Label run_compiled_code; |
556 // JVMTI events, such as single-stepping, are implemented partly by avoiding running |
127 // JVMTI events, such as single-stepping, are implemented partly by avoiding running |
557 // compiled code in threads for which the event is enabled. Check here for |
128 // compiled code in threads for which the event is enabled. Check here for |
558 // interp_only_mode if these events CAN be enabled. |
129 // interp_only_mode if these events CAN be enabled. |
559 #ifdef _LP64 |
130 #ifdef _LP64 |
565 // interp_only is an int, on little endian it is sufficient to test the byte only |
136 // interp_only is an int, on little endian it is sufficient to test the byte only |
566 // Is a cmpl faster? |
137 // Is a cmpl faster? |
567 __ cmpb(Address(rthread, JavaThread::interp_only_mode_offset()), 0); |
138 __ cmpb(Address(rthread, JavaThread::interp_only_mode_offset()), 0); |
568 __ jccb(Assembler::zero, run_compiled_code); |
139 __ jccb(Assembler::zero, run_compiled_code); |
569 __ jmp(Address(method, methodOopDesc::interpreter_entry_offset())); |
140 __ jmp(Address(method, methodOopDesc::interpreter_entry_offset())); |
570 __ bind(run_compiled_code); |
141 __ BIND(run_compiled_code); |
571 } |
142 } |
572 __ jmp(Address(method, methodOopDesc::from_interpreted_offset())); |
143 |
573 } |
144 const ByteSize entry_offset = for_compiler_entry ? methodOopDesc::from_compiled_offset() : |
|
145 methodOopDesc::from_interpreted_offset(); |
|
146 __ jmp(Address(method, entry_offset)); |
|
147 } |
|
148 |
|
149 void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, |
|
150 Register recv, Register method_temp, |
|
151 Register temp2, |
|
152 bool for_compiler_entry) { |
|
153 BLOCK_COMMENT("jump_to_lambda_form {"); |
|
154 // This is the initial entry point of a lazy method handle. |
|
155 // After type checking, it picks up the invoker from the LambdaForm. |
|
156 assert_different_registers(recv, method_temp, temp2); |
|
157 assert(recv != noreg, "required register"); |
|
158 assert(method_temp == rbx, "required register for loading method"); |
|
159 |
|
160 //NOT_PRODUCT({ FlagSetting fs(TraceMethodHandles, true); trace_method_handle(_masm, "LZMH"); }); |
|
161 |
|
162 // Load the invoker, as MH -> MH.form -> LF.vmentry |
|
163 __ verify_oop(recv); |
|
164 __ load_heap_oop(method_temp, Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()))); |
|
165 __ verify_oop(method_temp); |
|
166 __ load_heap_oop(method_temp, Address(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()))); |
|
167 __ verify_oop(method_temp); |
|
168 // the following assumes that a methodOop is normally compressed in the vmtarget field: |
|
169 __ load_heap_oop(method_temp, Address(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()))); |
|
170 __ verify_oop(method_temp); |
|
171 |
|
172 if (VerifyMethodHandles && !for_compiler_entry) { |
|
173 // make sure recv is already on stack |
|
174 __ load_sized_value(temp2, |
|
175 Address(method_temp, methodOopDesc::size_of_parameters_offset()), |
|
176 sizeof(u2), /*is_signed*/ false); |
|
177 // assert(sizeof(u2) == sizeof(methodOopDesc::_size_of_parameters), ""); |
|
178 Label L; |
|
179 __ cmpptr(recv, __ argument_address(temp2, -1)); |
|
180 __ jcc(Assembler::equal, L); |
|
181 __ movptr(rax, __ argument_address(temp2, -1)); |
|
182 __ STOP("receiver not on stack"); |
|
183 __ BIND(L); |
|
184 } |
|
185 |
|
186 jump_from_method_handle(_masm, method_temp, temp2, for_compiler_entry); |
|
187 BLOCK_COMMENT("} jump_to_lambda_form"); |
|
188 } |
|
189 |
574 |
190 |
575 // Code generation |
191 // Code generation |
576 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) { |
192 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, |
|
193 vmIntrinsics::ID iid) { |
|
194 const bool not_for_compiler_entry = false; // this is the interpreter entry |
|
195 assert(is_signature_polymorphic(iid), "expected invoke iid"); |
|
196 if (iid == vmIntrinsics::_invokeGeneric || |
|
197 iid == vmIntrinsics::_compiledLambdaForm) { |
|
198 // Perhaps surprisingly, the symbolic references visible to Java are not directly used. |
|
199 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. |
|
200 // They all allow an appendix argument. |
|
201 __ hlt(); // empty stubs make SG sick |
|
202 return NULL; |
|
203 } |
|
204 |
|
205 // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted) |
577 // rbx: methodOop |
206 // rbx: methodOop |
578 // rcx: receiver method handle (must load from sp[MethodTypeForm.vmslots]) |
207 // rdx: argument locator (parameter slot count, added to rsp) |
579 // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted) |
208 // rcx: used as temp to hold mh or receiver |
580 // rdx, rdi: garbage temp, blown away |
209 // rax, rdi: garbage temps, blown away |
581 |
210 Register rdx_argp = rdx; // argument list ptr, live on error paths |
582 Register rbx_method = rbx; |
211 Register rax_temp = rax; |
583 Register rcx_recv = rcx; |
212 Register rcx_mh = rcx; // MH receiver; dies quickly and is recycled |
584 Register rax_mtype = rax; |
213 Register rbx_method = rbx; // eventual target of this invocation |
585 Register rdx_temp = rdx; |
214 |
586 Register rdi_temp = rdi; |
215 address code_start = __ pc(); |
587 |
|
588 // emit WrongMethodType path first, to enable jccb back-branch from main path |
|
589 Label wrong_method_type; |
|
590 __ bind(wrong_method_type); |
|
591 Label invoke_generic_slow_path, invoke_exact_error_path; |
|
592 assert(methodOopDesc::intrinsic_id_size_in_bytes() == sizeof(u1), "");; |
|
593 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeExact); |
|
594 __ jcc(Assembler::notEqual, invoke_generic_slow_path); |
|
595 __ jmp(invoke_exact_error_path); |
|
596 |
216 |
597 // here's where control starts out: |
217 // here's where control starts out: |
598 __ align(CodeEntryAlignment); |
218 __ align(CodeEntryAlignment); |
599 address entry_point = __ pc(); |
219 address entry_point = __ pc(); |
600 |
220 |
601 // fetch the MethodType from the method handle into rax (the 'check' register) |
|
602 // FIXME: Interpreter should transmit pre-popped stack pointer, to locate base of arg list. |
|
603 // This would simplify several touchy bits of code. |
|
604 // See 6984712: JSR 292 method handle calls need a clean argument base pointer |
|
605 { |
|
606 Register tem = rbx_method; |
|
607 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) { |
|
608 __ movptr(rax_mtype, Address(tem, *pchase)); |
|
609 tem = rax_mtype; // in case there is another indirection |
|
610 } |
|
611 } |
|
612 |
|
613 // given the MethodType, find out where the MH argument is buried |
|
614 __ load_heap_oop(rdx_temp, Address(rax_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, rdi_temp))); |
|
615 Register rdx_vmslots = rdx_temp; |
|
616 __ movl(rdx_vmslots, Address(rdx_temp, __ delayed_value(java_lang_invoke_MethodTypeForm::vmslots_offset_in_bytes, rdi_temp))); |
|
617 Address mh_receiver_slot_addr = __ argument_address(rdx_vmslots); |
|
618 __ movptr(rcx_recv, mh_receiver_slot_addr); |
|
619 |
|
620 trace_method_handle(_masm, "invokeExact"); |
|
621 |
|
622 __ check_method_handle_type(rax_mtype, rcx_recv, rdi_temp, wrong_method_type); |
|
623 |
|
624 // Nobody uses the MH receiver slot after this. Make sure. |
|
625 DEBUG_ONLY(__ movptr(mh_receiver_slot_addr, (int32_t)0x999999)); |
|
626 |
|
627 __ jump_to_method_handle_entry(rcx_recv, rdi_temp); |
|
628 |
|
629 // error path for invokeExact (only) |
|
630 __ bind(invoke_exact_error_path); |
|
631 // ensure that the top of stack is properly aligned. |
|
632 __ mov(rdi, rsp); |
|
633 __ andptr(rsp, -StackAlignmentInBytes); // Align the stack for the ABI |
|
634 __ pushptr(Address(rdi, 0)); // Pick up the return address |
|
635 |
|
636 // Stub wants expected type in rax and the actual type in rcx |
|
637 __ jump(ExternalAddress(StubRoutines::throw_WrongMethodTypeException_entry())); |
|
638 |
|
639 // for invokeGeneric (only), apply argument and result conversions on the fly |
|
640 __ bind(invoke_generic_slow_path); |
|
641 #ifdef ASSERT |
|
642 if (VerifyMethodHandles) { |
221 if (VerifyMethodHandles) { |
643 Label L; |
222 Label L; |
644 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeGeneric); |
223 BLOCK_COMMENT("verify_intrinsic_id {"); |
|
224 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) iid); |
645 __ jcc(Assembler::equal, L); |
225 __ jcc(Assembler::equal, L); |
646 __ stop("bad methodOop::intrinsic_id"); |
226 if (iid == vmIntrinsics::_linkToVirtual || |
|
227 iid == vmIntrinsics::_linkToSpecial) { |
|
228 // could do this for all kinds, but would explode assembly code size |
|
229 trace_method_handle(_masm, "bad methodOop::intrinsic_id"); |
|
230 } |
|
231 __ STOP("bad methodOop::intrinsic_id"); |
647 __ bind(L); |
232 __ bind(L); |
648 } |
233 BLOCK_COMMENT("} verify_intrinsic_id"); |
649 #endif //ASSERT |
234 } |
650 Register rbx_temp = rbx_method; // don't need it now |
235 |
651 |
236 // First task: Find out how big the argument list is. |
652 // make room on the stack for another pointer: |
237 Address rdx_first_arg_addr; |
653 Register rcx_argslot = rcx_recv; |
238 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); |
654 __ lea(rcx_argslot, __ argument_address(rdx_vmslots, 1)); |
239 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); |
655 insert_arg_slots(_masm, 2 * stack_move_unit(), |
240 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { |
656 rcx_argslot, rbx_temp, rdx_temp); |
241 __ load_sized_value(rdx_argp, |
657 |
242 Address(rbx_method, methodOopDesc::size_of_parameters_offset()), |
658 // load up an adapter from the calling type (Java weaves this) |
243 sizeof(u2), /*is_signed*/ false); |
659 Register rdx_adapter = rdx_temp; |
244 // assert(sizeof(u2) == sizeof(methodOopDesc::_size_of_parameters), ""); |
660 __ load_heap_oop(rdx_temp, Address(rax_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, rdi_temp))); |
245 rdx_first_arg_addr = __ argument_address(rdx_argp, -1); |
661 __ load_heap_oop(rdx_adapter, Address(rdx_temp, __ delayed_value(java_lang_invoke_MethodTypeForm::genericInvoker_offset_in_bytes, rdi_temp))); |
246 } else { |
662 __ verify_oop(rdx_adapter); |
247 DEBUG_ONLY(rdx_argp = noreg); |
663 __ movptr(Address(rcx_argslot, 1 * Interpreter::stackElementSize), rdx_adapter); |
248 } |
664 // As a trusted first argument, pass the type being called, so the adapter knows |
249 |
665 // the actual types of the arguments and return values. |
250 if (!is_signature_polymorphic_static(iid)) { |
666 // (Generic invokers are shared among form-families of method-type.) |
251 __ movptr(rcx_mh, rdx_first_arg_addr); |
667 __ movptr(Address(rcx_argslot, 0 * Interpreter::stackElementSize), rax_mtype); |
252 DEBUG_ONLY(rdx_argp = noreg); |
668 // FIXME: assert that rdx_adapter is of the right method-type. |
253 } |
669 __ mov(rcx, rdx_adapter); |
254 |
670 trace_method_handle(_masm, "invokeGeneric"); |
255 // rdx_first_arg_addr is live! |
671 __ jump_to_method_handle_entry(rcx, rdi_temp); |
256 |
|
257 if (TraceMethodHandles) { |
|
258 const char* name = vmIntrinsics::name_at(iid); |
|
259 if (*name == '_') name += 1; |
|
260 const size_t len = strlen(name) + 50; |
|
261 char* qname = NEW_C_HEAP_ARRAY(char, len, mtInternal); |
|
262 const char* suffix = ""; |
|
263 if (vmIntrinsics::method_for(iid) == NULL || |
|
264 !vmIntrinsics::method_for(iid)->access_flags().is_public()) { |
|
265 if (is_signature_polymorphic_static(iid)) |
|
266 suffix = "/static"; |
|
267 else |
|
268 suffix = "/private"; |
|
269 } |
|
270 jio_snprintf(qname, len, "MethodHandle::interpreter_entry::%s%s", name, suffix); |
|
271 // note: stub look for mh in rcx |
|
272 trace_method_handle(_masm, qname); |
|
273 } |
|
274 |
|
275 if (iid == vmIntrinsics::_invokeBasic) { |
|
276 generate_method_handle_dispatch(_masm, iid, rcx_mh, noreg, not_for_compiler_entry); |
|
277 |
|
278 } else { |
|
279 // Adjust argument list by popping the trailing MemberName argument. |
|
280 Register rcx_recv = noreg; |
|
281 if (MethodHandles::ref_kind_has_receiver(ref_kind)) { |
|
282 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. |
|
283 __ movptr(rcx_recv = rcx, rdx_first_arg_addr); |
|
284 } |
|
285 DEBUG_ONLY(rdx_argp = noreg); |
|
286 Register rbx_member = rbx_method; // MemberName ptr; incoming method ptr is dead now |
|
287 __ pop(rax_temp); // return address |
|
288 __ pop(rbx_member); // extract last argument |
|
289 __ push(rax_temp); // re-push return address |
|
290 generate_method_handle_dispatch(_masm, iid, rcx_recv, rbx_member, not_for_compiler_entry); |
|
291 } |
|
292 |
|
293 if (PrintMethodHandleStubs) { |
|
294 address code_end = __ pc(); |
|
295 tty->print_cr("--------"); |
|
296 tty->print_cr("method handle interpreter entry for %s", vmIntrinsics::name_at(iid)); |
|
297 Disassembler::decode(code_start, code_end); |
|
298 tty->cr(); |
|
299 } |
672 |
300 |
673 return entry_point; |
301 return entry_point; |
674 } |
302 } |
675 |
303 |
676 // Helper to insert argument slots into the stack. |
304 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, |
677 // arg_slots must be a multiple of stack_move_unit() and < 0 |
305 vmIntrinsics::ID iid, |
678 // rax_argslot is decremented to point to the new (shifted) location of the argslot |
306 Register receiver_reg, |
679 // But, rdx_temp ends up holding the original value of rax_argslot. |
307 Register member_reg, |
680 void MethodHandles::insert_arg_slots(MacroAssembler* _masm, |
308 bool for_compiler_entry) { |
681 RegisterOrConstant arg_slots, |
309 assert(is_signature_polymorphic(iid), "expected invoke iid"); |
682 Register rax_argslot, |
310 Register rbx_method = rbx; // eventual target of this invocation |
683 Register rbx_temp, Register rdx_temp) { |
311 // temps used in this code are not used in *either* compiled or interpreted calling sequences |
684 // allow constant zero |
312 #ifdef _LP64 |
685 if (arg_slots.is_constant() && arg_slots.as_constant() == 0) |
313 Register temp1 = rscratch1; |
686 return; |
314 Register temp2 = rscratch2; |
687 assert_different_registers(rax_argslot, rbx_temp, rdx_temp, |
315 Register temp3 = rax; |
688 (!arg_slots.is_register() ? rsp : arg_slots.as_register())); |
316 if (for_compiler_entry) { |
689 if (VerifyMethodHandles) |
317 assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : j_rarg0), "only valid assignment"); |
690 verify_argslot(_masm, rax_argslot, "insertion point must fall within current frame"); |
318 assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); |
691 if (VerifyMethodHandles) |
319 assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); |
692 verify_stack_move(_masm, arg_slots, -1); |
320 assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); |
693 |
321 } |
694 // Make space on the stack for the inserted argument(s). |
322 #else |
695 // Then pull down everything shallower than rax_argslot. |
323 Register temp1 = (for_compiler_entry ? rsi : rdx); |
696 // The stacked return address gets pulled down with everything else. |
324 Register temp2 = rdi; |
697 // That is, copy [rsp, argslot) downward by -size words. In pseudo-code: |
325 Register temp3 = rax; |
698 // rsp -= size; |
326 if (for_compiler_entry) { |
699 // for (rdx = rsp + size; rdx < argslot; rdx++) |
327 assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : rcx), "only valid assignment"); |
700 // rdx[-size] = rdx[0] |
328 assert_different_registers(temp1, rcx, rdx); |
701 // argslot -= size; |
329 assert_different_registers(temp2, rcx, rdx); |
702 BLOCK_COMMENT("insert_arg_slots {"); |
330 assert_different_registers(temp3, rcx, rdx); |
703 __ mov(rdx_temp, rsp); // source pointer for copy |
331 } |
704 __ lea(rsp, Address(rsp, arg_slots, Interpreter::stackElementScale())); |
332 #endif |
705 { |
333 assert_different_registers(temp1, temp2, temp3, receiver_reg); |
706 Label loop; |
334 assert_different_registers(temp1, temp2, temp3, member_reg); |
707 __ BIND(loop); |
335 if (!for_compiler_entry) |
708 // pull one word down each time through the loop |
336 assert_different_registers(temp1, temp2, temp3, saved_last_sp_register()); // don't trash lastSP |
709 __ movptr(rbx_temp, Address(rdx_temp, 0)); |
337 |
710 __ movptr(Address(rdx_temp, arg_slots, Interpreter::stackElementScale()), rbx_temp); |
338 if (iid == vmIntrinsics::_invokeBasic) { |
711 __ addptr(rdx_temp, wordSize); |
339 // indirect through MH.form.vmentry.vmtarget |
712 __ cmpptr(rdx_temp, rax_argslot); |
340 jump_to_lambda_form(_masm, receiver_reg, rbx_method, temp1, for_compiler_entry); |
713 __ jcc(Assembler::below, loop); |
341 |
714 } |
|
715 |
|
716 // Now move the argslot down, to point to the opened-up space. |
|
717 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Interpreter::stackElementScale())); |
|
718 BLOCK_COMMENT("} insert_arg_slots"); |
|
719 } |
|
720 |
|
721 // Helper to remove argument slots from the stack. |
|
722 // arg_slots must be a multiple of stack_move_unit() and > 0 |
|
723 void MethodHandles::remove_arg_slots(MacroAssembler* _masm, |
|
724 RegisterOrConstant arg_slots, |
|
725 Register rax_argslot, |
|
726 Register rbx_temp, Register rdx_temp) { |
|
727 // allow constant zero |
|
728 if (arg_slots.is_constant() && arg_slots.as_constant() == 0) |
|
729 return; |
|
730 assert_different_registers(rax_argslot, rbx_temp, rdx_temp, |
|
731 (!arg_slots.is_register() ? rsp : arg_slots.as_register())); |
|
732 if (VerifyMethodHandles) |
|
733 verify_argslots(_masm, arg_slots, rax_argslot, false, |
|
734 "deleted argument(s) must fall within current frame"); |
|
735 if (VerifyMethodHandles) |
|
736 verify_stack_move(_masm, arg_slots, +1); |
|
737 |
|
738 BLOCK_COMMENT("remove_arg_slots {"); |
|
739 // Pull up everything shallower than rax_argslot. |
|
740 // Then remove the excess space on the stack. |
|
741 // The stacked return address gets pulled up with everything else. |
|
742 // That is, copy [rsp, argslot) upward by size words. In pseudo-code: |
|
743 // for (rdx = argslot-1; rdx >= rsp; --rdx) |
|
744 // rdx[size] = rdx[0] |
|
745 // argslot += size; |
|
746 // rsp += size; |
|
747 __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy |
|
748 { |
|
749 Label loop; |
|
750 __ BIND(loop); |
|
751 // pull one word up each time through the loop |
|
752 __ movptr(rbx_temp, Address(rdx_temp, 0)); |
|
753 __ movptr(Address(rdx_temp, arg_slots, Interpreter::stackElementScale()), rbx_temp); |
|
754 __ addptr(rdx_temp, -wordSize); |
|
755 __ cmpptr(rdx_temp, rsp); |
|
756 __ jcc(Assembler::aboveEqual, loop); |
|
757 } |
|
758 |
|
759 // Now move the argslot up, to point to the just-copied block. |
|
760 __ lea(rsp, Address(rsp, arg_slots, Interpreter::stackElementScale())); |
|
761 // And adjust the argslot address to point at the deletion point. |
|
762 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Interpreter::stackElementScale())); |
|
763 BLOCK_COMMENT("} remove_arg_slots"); |
|
764 } |
|
765 |
|
766 // Helper to copy argument slots to the top of the stack. |
|
767 // The sequence starts with rax_argslot and is counted by slot_count |
|
768 // slot_count must be a multiple of stack_move_unit() and >= 0 |
|
769 // This function blows the temps but does not change rax_argslot. |
|
770 void MethodHandles::push_arg_slots(MacroAssembler* _masm, |
|
771 Register rax_argslot, |
|
772 RegisterOrConstant slot_count, |
|
773 int skip_words_count, |
|
774 Register rbx_temp, Register rdx_temp) { |
|
775 assert_different_registers(rax_argslot, rbx_temp, rdx_temp, |
|
776 (!slot_count.is_register() ? rbp : slot_count.as_register()), |
|
777 rsp); |
|
778 assert(Interpreter::stackElementSize == wordSize, "else change this code"); |
|
779 |
|
780 if (VerifyMethodHandles) |
|
781 verify_stack_move(_masm, slot_count, 0); |
|
782 |
|
783 // allow constant zero |
|
784 if (slot_count.is_constant() && slot_count.as_constant() == 0) |
|
785 return; |
|
786 |
|
787 BLOCK_COMMENT("push_arg_slots {"); |
|
788 |
|
789 Register rbx_top = rbx_temp; |
|
790 |
|
791 // There is at most 1 word to carry down with the TOS. |
|
792 switch (skip_words_count) { |
|
793 case 1: __ pop(rdx_temp); break; |
|
794 case 0: break; |
|
795 default: ShouldNotReachHere(); |
|
796 } |
|
797 |
|
798 if (slot_count.is_constant()) { |
|
799 for (int i = slot_count.as_constant() - 1; i >= 0; i--) { |
|
800 __ pushptr(Address(rax_argslot, i * wordSize)); |
|
801 } |
|
802 } else { |
342 } else { |
803 Label L_plural, L_loop, L_break; |
343 // The method is a member invoker used by direct method handles. |
804 // Emit code to dynamically check for the common cases, zero and one slot. |
344 if (VerifyMethodHandles) { |
805 __ cmpl(slot_count.as_register(), (int32_t) 1); |
345 // make sure the trailing argument really is a MemberName (caller responsibility) |
806 __ jccb(Assembler::greater, L_plural); |
346 verify_klass(_masm, member_reg, SystemDictionaryHandles::MemberName_klass(), |
807 __ jccb(Assembler::less, L_break); |
347 "MemberName required for invokeVirtual etc."); |
808 __ pushptr(Address(rax_argslot, 0)); |
348 } |
809 __ jmpb(L_break); |
349 |
810 __ BIND(L_plural); |
350 Address member_clazz( member_reg, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes())); |
811 |
351 Address member_vmindex( member_reg, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes())); |
812 // Loop for 2 or more: |
352 Address member_vmtarget( member_reg, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes())); |
813 // rbx = &rax[slot_count] |
353 |
814 // while (rbx > rax) *(--rsp) = *(--rbx) |
354 Register temp1_recv_klass = temp1; |
815 __ lea(rbx_top, Address(rax_argslot, slot_count, Address::times_ptr)); |
355 if (iid != vmIntrinsics::_linkToStatic) { |
816 __ BIND(L_loop); |
356 __ verify_oop(receiver_reg); |
817 __ subptr(rbx_top, wordSize); |
357 if (iid == vmIntrinsics::_linkToSpecial) { |
818 __ pushptr(Address(rbx_top, 0)); |
358 // Don't actually load the klass; just null-check the receiver. |
819 __ cmpptr(rbx_top, rax_argslot); |
359 __ null_check(receiver_reg); |
820 __ jcc(Assembler::above, L_loop); |
360 } else { |
821 __ bind(L_break); |
361 // load receiver klass itself |
822 } |
362 __ null_check(receiver_reg, oopDesc::klass_offset_in_bytes()); |
823 switch (skip_words_count) { |
363 __ load_klass(temp1_recv_klass, receiver_reg); |
824 case 1: __ push(rdx_temp); break; |
364 __ verify_oop(temp1_recv_klass); |
825 case 0: break; |
365 } |
826 default: ShouldNotReachHere(); |
366 BLOCK_COMMENT("check_receiver {"); |
827 } |
367 // The receiver for the MemberName must be in receiver_reg. |
828 BLOCK_COMMENT("} push_arg_slots"); |
368 // Check the receiver against the MemberName.clazz |
829 } |
369 if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { |
830 |
370 // Did not load it above... |
831 // in-place movement; no change to rsp |
371 __ load_klass(temp1_recv_klass, receiver_reg); |
832 // blows rax_temp, rdx_temp |
372 __ verify_oop(temp1_recv_klass); |
833 void MethodHandles::move_arg_slots_up(MacroAssembler* _masm, |
373 } |
834 Register rbx_bottom, // invariant |
374 if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { |
835 Address top_addr, // can use rax_temp |
375 Label L_ok; |
836 RegisterOrConstant positive_distance_in_slots, |
376 Register temp2_defc = temp2; |
837 Register rax_temp, Register rdx_temp) { |
377 __ load_heap_oop(temp2_defc, member_clazz); |
838 BLOCK_COMMENT("move_arg_slots_up {"); |
378 load_klass_from_Class(_masm, temp2_defc); |
839 assert_different_registers(rbx_bottom, |
379 __ verify_oop(temp2_defc); |
840 rax_temp, rdx_temp, |
380 __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, L_ok); |
841 positive_distance_in_slots.register_or_noreg()); |
381 // If we get here, the type check failed! |
842 Label L_loop, L_break; |
382 __ STOP("receiver class disagrees with MemberName.clazz"); |
843 Register rax_top = rax_temp; |
383 __ bind(L_ok); |
844 if (!top_addr.is_same_address(Address(rax_top, 0))) |
384 } |
845 __ lea(rax_top, top_addr); |
385 BLOCK_COMMENT("} check_receiver"); |
846 // Detect empty (or broken) loop: |
386 } |
847 #ifdef ASSERT |
387 if (iid == vmIntrinsics::_linkToSpecial || |
848 if (VerifyMethodHandles) { |
388 iid == vmIntrinsics::_linkToStatic) { |
849 // Verify that &bottom < &top (non-empty interval) |
389 DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass |
850 Label L_ok, L_bad; |
390 } |
851 if (positive_distance_in_slots.is_register()) { |
391 |
852 __ cmpptr(positive_distance_in_slots.as_register(), (int32_t) 0); |
392 // Live registers at this point: |
853 __ jcc(Assembler::lessEqual, L_bad); |
393 // member_reg - MemberName that was the trailing argument |
854 } |
394 // temp1_recv_klass - klass of stacked receiver, if needed |
855 __ cmpptr(rbx_bottom, rax_top); |
395 // rsi/r13 - interpreter linkage (if interpreted) |
856 __ jcc(Assembler::below, L_ok); |
396 // rcx, rdx, rsi, rdi, r8, r8 - compiler arguments (if compiled) |
857 __ bind(L_bad); |
397 |
858 __ stop("valid bounds (copy up)"); |
398 bool method_is_live = false; |
859 __ BIND(L_ok); |
399 switch (iid) { |
860 } |
400 case vmIntrinsics::_linkToSpecial: |
861 #endif |
401 if (VerifyMethodHandles) { |
862 __ cmpptr(rbx_bottom, rax_top); |
402 verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp3); |
863 __ jccb(Assembler::aboveEqual, L_break); |
403 } |
864 // work rax down to rbx, copying contiguous data upwards |
404 __ load_heap_oop(rbx_method, member_vmtarget); |
865 // In pseudo-code: |
405 method_is_live = true; |
866 // [rbx, rax) = &[bottom, top) |
406 break; |
867 // while (--rax >= rbx) *(rax + distance) = *(rax + 0), rax--; |
407 |
868 __ BIND(L_loop); |
408 case vmIntrinsics::_linkToStatic: |
869 __ subptr(rax_top, wordSize); |
409 if (VerifyMethodHandles) { |
870 __ movptr(rdx_temp, Address(rax_top, 0)); |
410 verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp3); |
871 __ movptr( Address(rax_top, positive_distance_in_slots, Address::times_ptr), rdx_temp); |
411 } |
872 __ cmpptr(rax_top, rbx_bottom); |
412 __ load_heap_oop(rbx_method, member_vmtarget); |
873 __ jcc(Assembler::above, L_loop); |
413 method_is_live = true; |
874 assert(Interpreter::stackElementSize == wordSize, "else change loop"); |
414 break; |
875 __ bind(L_break); |
415 |
876 BLOCK_COMMENT("} move_arg_slots_up"); |
416 case vmIntrinsics::_linkToVirtual: |
877 } |
417 { |
878 |
418 // same as TemplateTable::invokevirtual, |
879 // in-place movement; no change to rsp |
419 // minus the CP setup and profiling: |
880 // blows rax_temp, rdx_temp |
420 |
881 void MethodHandles::move_arg_slots_down(MacroAssembler* _masm, |
421 if (VerifyMethodHandles) { |
882 Address bottom_addr, // can use rax_temp |
422 verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp3); |
883 Register rbx_top, // invariant |
423 } |
884 RegisterOrConstant negative_distance_in_slots, |
424 |
885 Register rax_temp, Register rdx_temp) { |
425 // pick out the vtable index from the MemberName, and then we can discard it: |
886 BLOCK_COMMENT("move_arg_slots_down {"); |
426 Register temp2_index = temp2; |
887 assert_different_registers(rbx_top, |
427 __ movptr(temp2_index, member_vmindex); |
888 negative_distance_in_slots.register_or_noreg(), |
428 |
889 rax_temp, rdx_temp); |
429 if (VerifyMethodHandles) { |
890 Label L_loop, L_break; |
430 Label L_index_ok; |
891 Register rax_bottom = rax_temp; |
431 __ cmpl(temp2_index, 0); |
892 if (!bottom_addr.is_same_address(Address(rax_bottom, 0))) |
432 __ jcc(Assembler::greaterEqual, L_index_ok); |
893 __ lea(rax_bottom, bottom_addr); |
433 __ STOP("no virtual index"); |
894 // Detect empty (or broken) loop: |
434 __ BIND(L_index_ok); |
895 #ifdef ASSERT |
435 } |
896 assert(!negative_distance_in_slots.is_constant() || negative_distance_in_slots.as_constant() < 0, ""); |
436 |
897 if (VerifyMethodHandles) { |
437 // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget |
898 // Verify that &bottom < &top (non-empty interval) |
438 // at this point. And VerifyMethodHandles has already checked clazz, if needed. |
899 Label L_ok, L_bad; |
439 |
900 if (negative_distance_in_slots.is_register()) { |
440 // get target methodOop & entry point |
901 __ cmpptr(negative_distance_in_slots.as_register(), (int32_t) 0); |
441 __ lookup_virtual_method(temp1_recv_klass, temp2_index, rbx_method); |
902 __ jcc(Assembler::greaterEqual, L_bad); |
442 method_is_live = true; |
903 } |
443 break; |
904 __ cmpptr(rax_bottom, rbx_top); |
444 } |
905 __ jcc(Assembler::below, L_ok); |
445 |
906 __ bind(L_bad); |
446 case vmIntrinsics::_linkToInterface: |
907 __ stop("valid bounds (copy down)"); |
447 { |
908 __ BIND(L_ok); |
448 // same as TemplateTable::invokeinterface |
909 } |
449 // (minus the CP setup and profiling, with different argument motion) |
910 #endif |
450 if (VerifyMethodHandles) { |
911 __ cmpptr(rax_bottom, rbx_top); |
451 verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp3); |
912 __ jccb(Assembler::aboveEqual, L_break); |
452 } |
913 // work rax up to rbx, copying contiguous data downwards |
453 |
914 // In pseudo-code: |
454 Register temp3_intf = temp3; |
915 // [rax, rbx) = &[bottom, top) |
455 __ load_heap_oop(temp3_intf, member_clazz); |
916 // while (rax < rbx) *(rax - distance) = *(rax + 0), rax++; |
456 load_klass_from_Class(_masm, temp3_intf); |
917 __ BIND(L_loop); |
457 __ verify_oop(temp3_intf); |
918 __ movptr(rdx_temp, Address(rax_bottom, 0)); |
458 |
919 __ movptr( Address(rax_bottom, negative_distance_in_slots, Address::times_ptr), rdx_temp); |
459 Register rbx_index = rbx_method; |
920 __ addptr(rax_bottom, wordSize); |
460 __ movptr(rbx_index, member_vmindex); |
921 __ cmpptr(rax_bottom, rbx_top); |
461 if (VerifyMethodHandles) { |
922 __ jcc(Assembler::below, L_loop); |
462 Label L; |
923 assert(Interpreter::stackElementSize == wordSize, "else change loop"); |
463 __ cmpl(rbx_index, 0); |
924 __ bind(L_break); |
464 __ jcc(Assembler::greaterEqual, L); |
925 BLOCK_COMMENT("} move_arg_slots_down"); |
465 __ STOP("invalid vtable index for MH.invokeInterface"); |
926 } |
466 __ bind(L); |
927 |
467 } |
928 // Copy from a field or array element to a stacked argument slot. |
468 |
929 // is_element (ignored) says whether caller is loading an array element instead of an instance field. |
469 // given intf, index, and recv klass, dispatch to the implementation method |
930 void MethodHandles::move_typed_arg(MacroAssembler* _masm, |
470 Label L_no_such_interface; |
931 BasicType type, bool is_element, |
471 __ lookup_interface_method(temp1_recv_klass, temp3_intf, |
932 Address slot_dest, Address value_src, |
472 // note: next two args must be the same: |
933 Register rbx_temp, Register rdx_temp) { |
473 rbx_index, rbx_method, |
934 BLOCK_COMMENT(!is_element ? "move_typed_arg {" : "move_typed_arg { (array element)"); |
474 temp2, |
935 if (type == T_OBJECT || type == T_ARRAY) { |
475 L_no_such_interface); |
936 __ load_heap_oop(rbx_temp, value_src); |
476 |
937 __ movptr(slot_dest, rbx_temp); |
477 __ verify_oop(rbx_method); |
938 } else if (type != T_VOID) { |
478 jump_from_method_handle(_masm, rbx_method, temp2, for_compiler_entry); |
939 int arg_size = type2aelembytes(type); |
479 __ hlt(); |
940 bool arg_is_signed = is_signed_subword_type(type); |
480 |
941 int slot_size = (arg_size > wordSize) ? arg_size : wordSize; |
481 __ bind(L_no_such_interface); |
942 __ load_sized_value( rdx_temp, value_src, arg_size, arg_is_signed, rbx_temp); |
482 __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); |
943 __ store_sized_value( slot_dest, rdx_temp, slot_size, rbx_temp); |
483 break; |
944 } |
484 } |
945 BLOCK_COMMENT("} move_typed_arg"); |
485 |
946 } |
486 default: |
947 |
487 fatal(err_msg("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); |
948 void MethodHandles::move_return_value(MacroAssembler* _masm, BasicType type, |
488 break; |
949 Address return_slot) { |
489 } |
950 BLOCK_COMMENT("move_return_value {"); |
490 |
951 // Old versions of the JVM must clean the FPU stack after every return. |
491 if (method_is_live) { |
952 #ifndef _LP64 |
492 // live at this point: rbx_method, rsi/r13 (if interpreted) |
953 #ifdef COMPILER2 |
493 |
954 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases |
494 // After figuring out which concrete method to call, jump into it. |
955 if ((type == T_FLOAT && UseSSE < 1) || (type == T_DOUBLE && UseSSE < 2)) { |
495 // Note that this works in the interpreter with no data motion. |
956 for (int i = 1; i < 8; i++) { |
496 // But the compiled version will require that rcx_recv be shifted out. |
957 __ ffree(i); |
497 __ verify_oop(rbx_method); |
958 } |
498 jump_from_method_handle(_masm, rbx_method, temp1, for_compiler_entry); |
959 } else if (UseSSE < 2) { |
499 } |
960 __ empty_FPU_stack(); |
500 } |
961 } |
|
962 #endif //COMPILER2 |
|
963 #endif //!_LP64 |
|
964 |
|
965 // Look at the type and pull the value out of the corresponding register. |
|
966 if (type == T_VOID) { |
|
967 // nothing to do |
|
968 } else if (type == T_OBJECT) { |
|
969 __ movptr(return_slot, rax); |
|
970 } else if (type == T_INT || is_subword_type(type)) { |
|
971 // write the whole word, even if only 32 bits is significant |
|
972 __ movptr(return_slot, rax); |
|
973 } else if (type == T_LONG) { |
|
974 // store the value by parts |
|
975 // Note: We assume longs are continguous (if misaligned) on the interpreter stack. |
|
976 __ store_sized_value(return_slot, rax, BytesPerLong, rdx); |
|
977 } else if (NOT_LP64((type == T_FLOAT && UseSSE < 1) || |
|
978 (type == T_DOUBLE && UseSSE < 2) ||) |
|
979 false) { |
|
980 // Use old x86 FPU registers: |
|
981 if (type == T_FLOAT) |
|
982 __ fstp_s(return_slot); |
|
983 else |
|
984 __ fstp_d(return_slot); |
|
985 } else if (type == T_FLOAT) { |
|
986 __ movflt(return_slot, xmm0); |
|
987 } else if (type == T_DOUBLE) { |
|
988 __ movdbl(return_slot, xmm0); |
|
989 } else { |
|
990 ShouldNotReachHere(); |
|
991 } |
|
992 BLOCK_COMMENT("} move_return_value"); |
|
993 } |
501 } |
994 |
502 |
995 #ifndef PRODUCT |
503 #ifndef PRODUCT |
996 #define DESCRIBE_RICOCHET_OFFSET(rf, name) \ |
|
997 values.describe(frame_no, (intptr_t *) (((uintptr_t)rf) + MethodHandles::RicochetFrame::name##_offset_in_bytes()), #name) |
|
998 |
|
999 void MethodHandles::RicochetFrame::describe(const frame* fr, FrameValues& values, int frame_no) { |
|
1000 address bp = (address) fr->fp(); |
|
1001 RicochetFrame* rf = (RicochetFrame*)(bp - sender_link_offset_in_bytes()); |
|
1002 |
|
1003 // ricochet slots |
|
1004 DESCRIBE_RICOCHET_OFFSET(rf, exact_sender_sp); |
|
1005 DESCRIBE_RICOCHET_OFFSET(rf, conversion); |
|
1006 DESCRIBE_RICOCHET_OFFSET(rf, saved_args_base); |
|
1007 DESCRIBE_RICOCHET_OFFSET(rf, saved_args_layout); |
|
1008 DESCRIBE_RICOCHET_OFFSET(rf, saved_target); |
|
1009 DESCRIBE_RICOCHET_OFFSET(rf, continuation); |
|
1010 |
|
1011 // relevant ricochet targets (in caller frame) |
|
1012 values.describe(-1, rf->saved_args_base(), err_msg("*saved_args_base for #%d", frame_no)); |
|
1013 } |
|
1014 #endif // ASSERT |
|
1015 |
|
1016 #ifndef PRODUCT |
|
1017 extern "C" void print_method_handle(oop mh); |
|
1018 void trace_method_handle_stub(const char* adaptername, |
504 void trace_method_handle_stub(const char* adaptername, |
1019 oop mh, |
505 oop mh, |
1020 intptr_t* saved_regs, |
506 intptr_t* saved_regs, |
1021 intptr_t* entry_sp) { |
507 intptr_t* entry_sp) { |
1022 // called as a leaf from native code: do not block the JVM! |
508 // called as a leaf from native code: do not block the JVM! |
1023 bool has_mh = (strstr(adaptername, "return/") == NULL); // return adapters don't have rcx_mh |
509 bool has_mh = (strstr(adaptername, "/static") == NULL && |
|
510 strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH |
1024 const char* mh_reg_name = has_mh ? "rcx_mh" : "rcx"; |
511 const char* mh_reg_name = has_mh ? "rcx_mh" : "rcx"; |
1025 tty->print_cr("MH %s %s="PTR_FORMAT" sp="PTR_FORMAT, adaptername, mh_reg_name, mh, entry_sp); |
512 tty->print_cr("MH %s %s="PTR_FORMAT" sp="PTR_FORMAT, |
|
513 adaptername, mh_reg_name, |
|
514 mh, entry_sp); |
1026 |
515 |
1027 if (Verbose) { |
516 if (Verbose) { |
1028 tty->print_cr("Registers:"); |
517 tty->print_cr("Registers:"); |
1029 const int saved_regs_count = RegisterImpl::number_of_registers; |
518 const int saved_regs_count = RegisterImpl::number_of_registers; |
1030 for (int i = 0; i < saved_regs_count; i++) { |
519 for (int i = 0; i < saved_regs_count; i++) { |
1157 __ leave(); |
652 __ leave(); |
1158 BLOCK_COMMENT("} trace_method_handle"); |
653 BLOCK_COMMENT("} trace_method_handle"); |
1159 } |
654 } |
1160 #endif //PRODUCT |
655 #endif //PRODUCT |
1161 |
656 |
1162 // which conversion op types are implemented here? |
|
1163 int MethodHandles::adapter_conversion_ops_supported_mask() { |
|
1164 return ((1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY) |
|
1165 |(1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW) |
|
1166 |(1<<java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST) |
|
1167 |(1<<java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM) |
|
1168 |(1<<java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM) |
|
1169 //OP_PRIM_TO_REF is below... |
|
1170 |(1<<java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS) |
|
1171 |(1<<java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS) |
|
1172 |(1<<java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS) |
|
1173 |(1<<java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS) |
|
1174 //OP_COLLECT_ARGS is below... |
|
1175 |(1<<java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS) |
|
1176 |( |
|
1177 java_lang_invoke_MethodTypeForm::vmlayout_offset_in_bytes() <= 0 ? 0 : |
|
1178 ((1<<java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF) |
|
1179 |(1<<java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS) |
|
1180 |(1<<java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS) |
|
1181 )) |
|
1182 ); |
|
1183 } |
|
1184 |
|
1185 //------------------------------------------------------------------------------ |
|
1186 // MethodHandles::generate_method_handle_stub |
|
1187 // |
|
1188 // Generate an "entry" field for a method handle. |
|
1189 // This determines how the method handle will respond to calls. |
|
1190 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) { |
|
1191 MethodHandles::EntryKind ek_orig = ek_original_kind(ek); |
|
1192 |
|
1193 // Here is the register state during an interpreted call, |
|
1194 // as set up by generate_method_handle_interpreter_entry(): |
|
1195 // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused) |
|
1196 // - rcx: receiver method handle |
|
1197 // - rax: method handle type (only used by the check_mtype entry point) |
|
1198 // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted) |
|
1199 // - rdx: garbage temp, can blow away |
|
1200 |
|
1201 const Register rcx_recv = rcx; |
|
1202 const Register rax_argslot = rax; |
|
1203 const Register rbx_temp = rbx; |
|
1204 const Register rdx_temp = rdx; |
|
1205 const Register rdi_temp = rdi; |
|
1206 |
|
1207 // This guy is set up by prepare_to_jump_from_interpreted (from interpreted calls) |
|
1208 // and gen_c2i_adapter (from compiled calls): |
|
1209 const Register saved_last_sp = saved_last_sp_register(); |
|
1210 |
|
1211 // Argument registers for _raise_exception. |
|
1212 // 32-bit: Pass first two oop/int args in registers ECX and EDX. |
|
1213 const Register rarg0_code = LP64_ONLY(j_rarg0) NOT_LP64(rcx); |
|
1214 const Register rarg1_actual = LP64_ONLY(j_rarg1) NOT_LP64(rdx); |
|
1215 const Register rarg2_required = LP64_ONLY(j_rarg2) NOT_LP64(rdi); |
|
1216 assert_different_registers(rarg0_code, rarg1_actual, rarg2_required, saved_last_sp); |
|
1217 |
|
1218 guarantee(java_lang_invoke_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets"); |
|
1219 |
|
1220 // some handy addresses |
|
1221 Address rcx_mh_vmtarget( rcx_recv, java_lang_invoke_MethodHandle::vmtarget_offset_in_bytes() ); |
|
1222 Address rcx_dmh_vmindex( rcx_recv, java_lang_invoke_DirectMethodHandle::vmindex_offset_in_bytes() ); |
|
1223 |
|
1224 Address rcx_bmh_vmargslot( rcx_recv, java_lang_invoke_BoundMethodHandle::vmargslot_offset_in_bytes() ); |
|
1225 Address rcx_bmh_argument( rcx_recv, java_lang_invoke_BoundMethodHandle::argument_offset_in_bytes() ); |
|
1226 |
|
1227 Address rcx_amh_vmargslot( rcx_recv, java_lang_invoke_AdapterMethodHandle::vmargslot_offset_in_bytes() ); |
|
1228 Address rcx_amh_argument( rcx_recv, java_lang_invoke_AdapterMethodHandle::argument_offset_in_bytes() ); |
|
1229 Address rcx_amh_conversion( rcx_recv, java_lang_invoke_AdapterMethodHandle::conversion_offset_in_bytes() ); |
|
1230 Address vmarg; // __ argument_address(vmargslot) |
|
1231 |
|
1232 const int java_mirror_offset = in_bytes(Klass::java_mirror_offset()); |
|
1233 |
|
1234 if (have_entry(ek)) { |
|
1235 __ nop(); // empty stubs make SG sick |
|
1236 return; |
|
1237 } |
|
1238 |
|
1239 #ifdef ASSERT |
|
1240 __ push((int32_t) 0xEEEEEEEE); |
|
1241 __ push((int32_t) (intptr_t) entry_name(ek)); |
|
1242 LP64_ONLY(__ push((int32_t) high((intptr_t) entry_name(ek)))); |
|
1243 __ push((int32_t) 0x33333333); |
|
1244 #endif //ASSERT |
|
1245 |
|
1246 address interp_entry = __ pc(); |
|
1247 |
|
1248 trace_method_handle(_masm, entry_name(ek)); |
|
1249 |
|
1250 BLOCK_COMMENT(err_msg("Entry %s {", entry_name(ek))); |
|
1251 |
|
1252 switch ((int) ek) { |
|
1253 case _raise_exception: |
|
1254 { |
|
1255 // Not a real MH entry, but rather shared code for raising an |
|
1256 // exception. Since we use the compiled entry, arguments are |
|
1257 // expected in compiler argument registers. |
|
1258 assert(raise_exception_method(), "must be set"); |
|
1259 assert(raise_exception_method()->from_compiled_entry(), "method must be linked"); |
|
1260 |
|
1261 const Register rax_pc = rax; |
|
1262 __ pop(rax_pc); // caller PC |
|
1263 __ mov(rsp, saved_last_sp); // cut the stack back to where the caller started |
|
1264 |
|
1265 Register rbx_method = rbx_temp; |
|
1266 __ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method)); |
|
1267 |
|
1268 const int jobject_oop_offset = 0; |
|
1269 __ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject |
|
1270 |
|
1271 __ movptr(saved_last_sp, rsp); |
|
1272 __ subptr(rsp, 3 * wordSize); |
|
1273 __ push(rax_pc); // restore caller PC |
|
1274 |
|
1275 __ movl (__ argument_address(constant(2)), rarg0_code); |
|
1276 __ movptr(__ argument_address(constant(1)), rarg1_actual); |
|
1277 __ movptr(__ argument_address(constant(0)), rarg2_required); |
|
1278 jump_from_method_handle(_masm, rbx_method, rax); |
|
1279 } |
|
1280 break; |
|
1281 |
|
1282 case _invokestatic_mh: |
|
1283 case _invokespecial_mh: |
|
1284 { |
|
1285 Register rbx_method = rbx_temp; |
|
1286 __ load_heap_oop(rbx_method, rcx_mh_vmtarget); // target is a methodOop |
|
1287 __ verify_oop(rbx_method); |
|
1288 // same as TemplateTable::invokestatic or invokespecial, |
|
1289 // minus the CP setup and profiling: |
|
1290 if (ek == _invokespecial_mh) { |
|
1291 // Must load & check the first argument before entering the target method. |
|
1292 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp); |
|
1293 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1)); |
|
1294 __ null_check(rcx_recv); |
|
1295 __ verify_oop(rcx_recv); |
|
1296 } |
|
1297 jump_from_method_handle(_masm, rbx_method, rax); |
|
1298 } |
|
1299 break; |
|
1300 |
|
1301 case _invokevirtual_mh: |
|
1302 { |
|
1303 // same as TemplateTable::invokevirtual, |
|
1304 // minus the CP setup and profiling: |
|
1305 |
|
1306 // pick out the vtable index and receiver offset from the MH, |
|
1307 // and then we can discard it: |
|
1308 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp); |
|
1309 Register rbx_index = rbx_temp; |
|
1310 __ movl(rbx_index, rcx_dmh_vmindex); |
|
1311 // Note: The verifier allows us to ignore rcx_mh_vmtarget. |
|
1312 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1)); |
|
1313 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes()); |
|
1314 |
|
1315 // get receiver klass |
|
1316 Register rax_klass = rax_argslot; |
|
1317 __ load_klass(rax_klass, rcx_recv); |
|
1318 __ verify_oop(rax_klass); |
|
1319 |
|
1320 // get target methodOop & entry point |
|
1321 const int base = instanceKlass::vtable_start_offset() * wordSize; |
|
1322 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below"); |
|
1323 Address vtable_entry_addr(rax_klass, |
|
1324 rbx_index, Address::times_ptr, |
|
1325 base + vtableEntry::method_offset_in_bytes()); |
|
1326 Register rbx_method = rbx_temp; |
|
1327 __ movptr(rbx_method, vtable_entry_addr); |
|
1328 |
|
1329 __ verify_oop(rbx_method); |
|
1330 jump_from_method_handle(_masm, rbx_method, rax); |
|
1331 } |
|
1332 break; |
|
1333 |
|
1334 case _invokeinterface_mh: |
|
1335 { |
|
1336 // same as TemplateTable::invokeinterface, |
|
1337 // minus the CP setup and profiling: |
|
1338 |
|
1339 // pick out the interface and itable index from the MH. |
|
1340 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp); |
|
1341 Register rdx_intf = rdx_temp; |
|
1342 Register rbx_index = rbx_temp; |
|
1343 __ load_heap_oop(rdx_intf, rcx_mh_vmtarget); |
|
1344 __ movl(rbx_index, rcx_dmh_vmindex); |
|
1345 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1)); |
|
1346 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes()); |
|
1347 |
|
1348 // get receiver klass |
|
1349 Register rax_klass = rax_argslot; |
|
1350 __ load_klass(rax_klass, rcx_recv); |
|
1351 __ verify_oop(rax_klass); |
|
1352 |
|
1353 Register rbx_method = rbx_index; |
|
1354 |
|
1355 // get interface klass |
|
1356 Label no_such_interface; |
|
1357 __ verify_oop(rdx_intf); |
|
1358 __ lookup_interface_method(rax_klass, rdx_intf, |
|
1359 // note: next two args must be the same: |
|
1360 rbx_index, rbx_method, |
|
1361 rdi_temp, |
|
1362 no_such_interface); |
|
1363 |
|
1364 __ verify_oop(rbx_method); |
|
1365 jump_from_method_handle(_masm, rbx_method, rax); |
|
1366 __ hlt(); |
|
1367 |
|
1368 __ bind(no_such_interface); |
|
1369 // Throw an exception. |
|
1370 // For historical reasons, it will be IncompatibleClassChangeError. |
|
1371 __ mov(rbx_temp, rcx_recv); // rarg2_required might be RCX |
|
1372 assert_different_registers(rarg2_required, rbx_temp); |
|
1373 __ movptr(rarg2_required, Address(rdx_intf, java_mirror_offset)); // required interface |
|
1374 __ mov( rarg1_actual, rbx_temp); // bad receiver |
|
1375 __ movl( rarg0_code, (int) Bytecodes::_invokeinterface); // who is complaining? |
|
1376 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception))); |
|
1377 } |
|
1378 break; |
|
1379 |
|
1380 case _bound_ref_mh: |
|
1381 case _bound_int_mh: |
|
1382 case _bound_long_mh: |
|
1383 case _bound_ref_direct_mh: |
|
1384 case _bound_int_direct_mh: |
|
1385 case _bound_long_direct_mh: |
|
1386 { |
|
1387 const bool direct_to_method = (ek >= _bound_ref_direct_mh); |
|
1388 BasicType arg_type = ek_bound_mh_arg_type(ek); |
|
1389 int arg_slots = type2size[arg_type]; |
|
1390 |
|
1391 // make room for the new argument: |
|
1392 __ movl(rax_argslot, rcx_bmh_vmargslot); |
|
1393 __ lea(rax_argslot, __ argument_address(rax_argslot)); |
|
1394 |
|
1395 insert_arg_slots(_masm, arg_slots * stack_move_unit(), rax_argslot, rbx_temp, rdx_temp); |
|
1396 |
|
1397 // store bound argument into the new stack slot: |
|
1398 __ load_heap_oop(rbx_temp, rcx_bmh_argument); |
|
1399 if (arg_type == T_OBJECT) { |
|
1400 __ movptr(Address(rax_argslot, 0), rbx_temp); |
|
1401 } else { |
|
1402 Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type)); |
|
1403 move_typed_arg(_masm, arg_type, false, |
|
1404 Address(rax_argslot, 0), |
|
1405 prim_value_addr, |
|
1406 rbx_temp, rdx_temp); |
|
1407 } |
|
1408 |
|
1409 if (direct_to_method) { |
|
1410 Register rbx_method = rbx_temp; |
|
1411 __ load_heap_oop(rbx_method, rcx_mh_vmtarget); |
|
1412 __ verify_oop(rbx_method); |
|
1413 jump_from_method_handle(_masm, rbx_method, rax); |
|
1414 } else { |
|
1415 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget); |
|
1416 __ verify_oop(rcx_recv); |
|
1417 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
1418 } |
|
1419 } |
|
1420 break; |
|
1421 |
|
1422 case _adapter_opt_profiling: |
|
1423 if (java_lang_invoke_CountingMethodHandle::vmcount_offset_in_bytes() != 0) { |
|
1424 Address rcx_mh_vmcount(rcx_recv, java_lang_invoke_CountingMethodHandle::vmcount_offset_in_bytes()); |
|
1425 __ incrementl(rcx_mh_vmcount); |
|
1426 } |
|
1427 // fall through |
|
1428 |
|
1429 case _adapter_retype_only: |
|
1430 case _adapter_retype_raw: |
|
1431 // immediately jump to the next MH layer: |
|
1432 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget); |
|
1433 __ verify_oop(rcx_recv); |
|
1434 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
1435 // This is OK when all parameter types widen. |
|
1436 // It is also OK when a return type narrows. |
|
1437 break; |
|
1438 |
|
1439 case _adapter_check_cast: |
|
1440 { |
|
1441 // temps: |
|
1442 Register rbx_klass = rbx_temp; // interesting AMH data |
|
1443 |
|
1444 // check a reference argument before jumping to the next layer of MH: |
|
1445 __ movl(rax_argslot, rcx_amh_vmargslot); |
|
1446 vmarg = __ argument_address(rax_argslot); |
|
1447 |
|
1448 // What class are we casting to? |
|
1449 __ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object! |
|
1450 load_klass_from_Class(_masm, rbx_klass); |
|
1451 |
|
1452 Label done; |
|
1453 __ movptr(rdx_temp, vmarg); |
|
1454 __ testptr(rdx_temp, rdx_temp); |
|
1455 __ jcc(Assembler::zero, done); // no cast if null |
|
1456 __ load_klass(rdx_temp, rdx_temp); |
|
1457 |
|
1458 // live at this point: |
|
1459 // - rbx_klass: klass required by the target method |
|
1460 // - rdx_temp: argument klass to test |
|
1461 // - rcx_recv: adapter method handle |
|
1462 __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done); |
|
1463 |
|
1464 // If we get here, the type check failed! |
|
1465 // Call the wrong_method_type stub, passing the failing argument type in rax. |
|
1466 Register rax_mtype = rax_argslot; |
|
1467 __ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field |
|
1468 __ movptr(rdx_temp, vmarg); |
|
1469 |
|
1470 assert_different_registers(rarg2_required, rdx_temp); |
|
1471 __ load_heap_oop(rarg2_required, rcx_amh_argument); // required class |
|
1472 __ mov( rarg1_actual, rdx_temp); // bad object |
|
1473 __ movl( rarg0_code, (int) Bytecodes::_checkcast); // who is complaining? |
|
1474 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception))); |
|
1475 |
|
1476 __ bind(done); |
|
1477 // get the new MH: |
|
1478 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget); |
|
1479 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
1480 } |
|
1481 break; |
|
1482 |
|
1483 case _adapter_prim_to_prim: |
|
1484 case _adapter_ref_to_prim: |
|
1485 case _adapter_prim_to_ref: |
|
1486 // handled completely by optimized cases |
|
1487 __ stop("init_AdapterMethodHandle should not issue this"); |
|
1488 break; |
|
1489 |
|
1490 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim |
|
1491 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim |
|
1492 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim |
|
1493 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim |
|
1494 { |
|
1495 // perform an in-place conversion to int or an int subword |
|
1496 __ movl(rax_argslot, rcx_amh_vmargslot); |
|
1497 vmarg = __ argument_address(rax_argslot); |
|
1498 |
|
1499 switch (ek) { |
|
1500 case _adapter_opt_i2i: |
|
1501 __ movl(rdx_temp, vmarg); |
|
1502 break; |
|
1503 case _adapter_opt_l2i: |
|
1504 { |
|
1505 // just delete the extra slot; on a little-endian machine we keep the first |
|
1506 __ lea(rax_argslot, __ argument_address(rax_argslot, 1)); |
|
1507 remove_arg_slots(_masm, -stack_move_unit(), |
|
1508 rax_argslot, rbx_temp, rdx_temp); |
|
1509 vmarg = Address(rax_argslot, -Interpreter::stackElementSize); |
|
1510 __ movl(rdx_temp, vmarg); |
|
1511 } |
|
1512 break; |
|
1513 case _adapter_opt_unboxi: |
|
1514 { |
|
1515 // Load the value up from the heap. |
|
1516 __ movptr(rdx_temp, vmarg); |
|
1517 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT); |
|
1518 #ifdef ASSERT |
|
1519 for (int bt = T_BOOLEAN; bt < T_INT; bt++) { |
|
1520 if (is_subword_type(BasicType(bt))) |
|
1521 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), ""); |
|
1522 } |
|
1523 #endif |
|
1524 __ null_check(rdx_temp, value_offset); |
|
1525 __ movl(rdx_temp, Address(rdx_temp, value_offset)); |
|
1526 // We load this as a word. Because we are little-endian, |
|
1527 // the low bits will be correct, but the high bits may need cleaning. |
|
1528 // The vminfo will guide us to clean those bits. |
|
1529 } |
|
1530 break; |
|
1531 default: |
|
1532 ShouldNotReachHere(); |
|
1533 } |
|
1534 |
|
1535 // Do the requested conversion and store the value. |
|
1536 Register rbx_vminfo = rbx_temp; |
|
1537 load_conversion_vminfo(_masm, rbx_vminfo, rcx_amh_conversion); |
|
1538 |
|
1539 // get the new MH: |
|
1540 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget); |
|
1541 // (now we are done with the old MH) |
|
1542 |
|
1543 // original 32-bit vmdata word must be of this form: |
|
1544 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 | |
|
1545 __ xchgptr(rcx, rbx_vminfo); // free rcx for shifts |
|
1546 __ shll(rdx_temp /*, rcx*/); |
|
1547 Label zero_extend, done; |
|
1548 __ testl(rcx, CONV_VMINFO_SIGN_FLAG); |
|
1549 __ jccb(Assembler::zero, zero_extend); |
|
1550 |
|
1551 // this path is taken for int->byte, int->short |
|
1552 __ sarl(rdx_temp /*, rcx*/); |
|
1553 __ jmpb(done); |
|
1554 |
|
1555 __ bind(zero_extend); |
|
1556 // this is taken for int->char |
|
1557 __ shrl(rdx_temp /*, rcx*/); |
|
1558 |
|
1559 __ bind(done); |
|
1560 __ movl(vmarg, rdx_temp); // Store the value. |
|
1561 __ xchgptr(rcx, rbx_vminfo); // restore rcx_recv |
|
1562 |
|
1563 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
1564 } |
|
1565 break; |
|
1566 |
|
1567 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim |
|
1568 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim |
|
1569 { |
|
1570 // perform an in-place int-to-long or ref-to-long conversion |
|
1571 __ movl(rax_argslot, rcx_amh_vmargslot); |
|
1572 |
|
1573 // on a little-endian machine we keep the first slot and add another after |
|
1574 __ lea(rax_argslot, __ argument_address(rax_argslot, 1)); |
|
1575 insert_arg_slots(_masm, stack_move_unit(), |
|
1576 rax_argslot, rbx_temp, rdx_temp); |
|
1577 Address vmarg1(rax_argslot, -Interpreter::stackElementSize); |
|
1578 Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize); |
|
1579 |
|
1580 switch (ek) { |
|
1581 case _adapter_opt_i2l: |
|
1582 { |
|
1583 #ifdef _LP64 |
|
1584 __ movslq(rdx_temp, vmarg1); // Load sign-extended |
|
1585 __ movq(vmarg1, rdx_temp); // Store into first slot |
|
1586 #else |
|
1587 __ movl(rdx_temp, vmarg1); |
|
1588 __ sarl(rdx_temp, BitsPerInt - 1); // __ extend_sign() |
|
1589 __ movl(vmarg2, rdx_temp); // store second word |
|
1590 #endif |
|
1591 } |
|
1592 break; |
|
1593 case _adapter_opt_unboxl: |
|
1594 { |
|
1595 // Load the value up from the heap. |
|
1596 __ movptr(rdx_temp, vmarg1); |
|
1597 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG); |
|
1598 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), ""); |
|
1599 __ null_check(rdx_temp, value_offset); |
|
1600 #ifdef _LP64 |
|
1601 __ movq(rbx_temp, Address(rdx_temp, value_offset)); |
|
1602 __ movq(vmarg1, rbx_temp); |
|
1603 #else |
|
1604 __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt)); |
|
1605 __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt)); |
|
1606 __ movl(vmarg1, rbx_temp); |
|
1607 __ movl(vmarg2, rdx_temp); |
|
1608 #endif |
|
1609 } |
|
1610 break; |
|
1611 default: |
|
1612 ShouldNotReachHere(); |
|
1613 } |
|
1614 |
|
1615 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget); |
|
1616 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
1617 } |
|
1618 break; |
|
1619 |
|
1620 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim |
|
1621 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim |
|
1622 { |
|
1623 // perform an in-place floating primitive conversion |
|
1624 __ movl(rax_argslot, rcx_amh_vmargslot); |
|
1625 __ lea(rax_argslot, __ argument_address(rax_argslot, 1)); |
|
1626 if (ek == _adapter_opt_f2d) { |
|
1627 insert_arg_slots(_masm, stack_move_unit(), |
|
1628 rax_argslot, rbx_temp, rdx_temp); |
|
1629 } |
|
1630 Address vmarg(rax_argslot, -Interpreter::stackElementSize); |
|
1631 |
|
1632 #ifdef _LP64 |
|
1633 if (ek == _adapter_opt_f2d) { |
|
1634 __ movflt(xmm0, vmarg); |
|
1635 __ cvtss2sd(xmm0, xmm0); |
|
1636 __ movdbl(vmarg, xmm0); |
|
1637 } else { |
|
1638 __ movdbl(xmm0, vmarg); |
|
1639 __ cvtsd2ss(xmm0, xmm0); |
|
1640 __ movflt(vmarg, xmm0); |
|
1641 } |
|
1642 #else //_LP64 |
|
1643 if (ek == _adapter_opt_f2d) { |
|
1644 __ fld_s(vmarg); // load float to ST0 |
|
1645 __ fstp_d(vmarg); // store double |
|
1646 } else { |
|
1647 __ fld_d(vmarg); // load double to ST0 |
|
1648 __ fstp_s(vmarg); // store single |
|
1649 } |
|
1650 #endif //_LP64 |
|
1651 |
|
1652 if (ek == _adapter_opt_d2f) { |
|
1653 remove_arg_slots(_masm, -stack_move_unit(), |
|
1654 rax_argslot, rbx_temp, rdx_temp); |
|
1655 } |
|
1656 |
|
1657 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget); |
|
1658 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
1659 } |
|
1660 break; |
|
1661 |
|
1662 case _adapter_swap_args: |
|
1663 case _adapter_rot_args: |
|
1664 // handled completely by optimized cases |
|
1665 __ stop("init_AdapterMethodHandle should not issue this"); |
|
1666 break; |
|
1667 |
|
1668 case _adapter_opt_swap_1: |
|
1669 case _adapter_opt_swap_2: |
|
1670 case _adapter_opt_rot_1_up: |
|
1671 case _adapter_opt_rot_1_down: |
|
1672 case _adapter_opt_rot_2_up: |
|
1673 case _adapter_opt_rot_2_down: |
|
1674 { |
|
1675 int swap_slots = ek_adapter_opt_swap_slots(ek); |
|
1676 int rotate = ek_adapter_opt_swap_mode(ek); |
|
1677 |
|
1678 // 'argslot' is the position of the first argument to swap |
|
1679 __ movl(rax_argslot, rcx_amh_vmargslot); |
|
1680 __ lea(rax_argslot, __ argument_address(rax_argslot)); |
|
1681 |
|
1682 // 'vminfo' is the second |
|
1683 Register rbx_destslot = rbx_temp; |
|
1684 load_conversion_vminfo(_masm, rbx_destslot, rcx_amh_conversion); |
|
1685 __ lea(rbx_destslot, __ argument_address(rbx_destslot)); |
|
1686 if (VerifyMethodHandles) |
|
1687 verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"); |
|
1688 |
|
1689 assert(Interpreter::stackElementSize == wordSize, "else rethink use of wordSize here"); |
|
1690 if (!rotate) { |
|
1691 // simple swap |
|
1692 for (int i = 0; i < swap_slots; i++) { |
|
1693 __ movptr(rdi_temp, Address(rax_argslot, i * wordSize)); |
|
1694 __ movptr(rdx_temp, Address(rbx_destslot, i * wordSize)); |
|
1695 __ movptr(Address(rax_argslot, i * wordSize), rdx_temp); |
|
1696 __ movptr(Address(rbx_destslot, i * wordSize), rdi_temp); |
|
1697 } |
|
1698 } else { |
|
1699 // A rotate is actually pair of moves, with an "odd slot" (or pair) |
|
1700 // changing place with a series of other slots. |
|
1701 // First, push the "odd slot", which is going to get overwritten |
|
1702 for (int i = swap_slots - 1; i >= 0; i--) { |
|
1703 // handle one with rdi_temp instead of a push: |
|
1704 if (i == 0) __ movptr(rdi_temp, Address(rax_argslot, i * wordSize)); |
|
1705 else __ pushptr( Address(rax_argslot, i * wordSize)); |
|
1706 } |
|
1707 if (rotate > 0) { |
|
1708 // Here is rotate > 0: |
|
1709 // (low mem) (high mem) |
|
1710 // | dest: more_slots... | arg: odd_slot :arg+1 | |
|
1711 // => |
|
1712 // | dest: odd_slot | dest+1: more_slots... :arg+1 | |
|
1713 // work argslot down to destslot, copying contiguous data upwards |
|
1714 // pseudo-code: |
|
1715 // rax = src_addr - swap_bytes |
|
1716 // rbx = dest_addr |
|
1717 // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--; |
|
1718 move_arg_slots_up(_masm, |
|
1719 rbx_destslot, |
|
1720 Address(rax_argslot, 0), |
|
1721 swap_slots, |
|
1722 rax_argslot, rdx_temp); |
|
1723 } else { |
|
1724 // Here is the other direction, rotate < 0: |
|
1725 // (low mem) (high mem) |
|
1726 // | arg: odd_slot | arg+1: more_slots... :dest+1 | |
|
1727 // => |
|
1728 // | arg: more_slots... | dest: odd_slot :dest+1 | |
|
1729 // work argslot up to destslot, copying contiguous data downwards |
|
1730 // pseudo-code: |
|
1731 // rax = src_addr + swap_bytes |
|
1732 // rbx = dest_addr |
|
1733 // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++; |
|
1734 // dest_slot denotes an exclusive upper limit |
|
1735 int limit_bias = OP_ROT_ARGS_DOWN_LIMIT_BIAS; |
|
1736 if (limit_bias != 0) |
|
1737 __ addptr(rbx_destslot, - limit_bias * wordSize); |
|
1738 move_arg_slots_down(_masm, |
|
1739 Address(rax_argslot, swap_slots * wordSize), |
|
1740 rbx_destslot, |
|
1741 -swap_slots, |
|
1742 rax_argslot, rdx_temp); |
|
1743 __ subptr(rbx_destslot, swap_slots * wordSize); |
|
1744 } |
|
1745 // pop the original first chunk into the destination slot, now free |
|
1746 for (int i = 0; i < swap_slots; i++) { |
|
1747 if (i == 0) __ movptr(Address(rbx_destslot, i * wordSize), rdi_temp); |
|
1748 else __ popptr(Address(rbx_destslot, i * wordSize)); |
|
1749 } |
|
1750 } |
|
1751 |
|
1752 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget); |
|
1753 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
1754 } |
|
1755 break; |
|
1756 |
|
1757 case _adapter_dup_args: |
|
1758 { |
|
1759 // 'argslot' is the position of the first argument to duplicate |
|
1760 __ movl(rax_argslot, rcx_amh_vmargslot); |
|
1761 __ lea(rax_argslot, __ argument_address(rax_argslot)); |
|
1762 |
|
1763 // 'stack_move' is negative number of words to duplicate |
|
1764 Register rdi_stack_move = rdi_temp; |
|
1765 load_stack_move(_masm, rdi_stack_move, rcx_recv, true); |
|
1766 |
|
1767 if (VerifyMethodHandles) { |
|
1768 verify_argslots(_masm, rdi_stack_move, rax_argslot, true, |
|
1769 "copied argument(s) must fall within current frame"); |
|
1770 } |
|
1771 |
|
1772 // insert location is always the bottom of the argument list: |
|
1773 Address insert_location = __ argument_address(constant(0)); |
|
1774 int pre_arg_words = insert_location.disp() / wordSize; // return PC is pushed |
|
1775 assert(insert_location.base() == rsp, ""); |
|
1776 |
|
1777 __ negl(rdi_stack_move); |
|
1778 push_arg_slots(_masm, rax_argslot, rdi_stack_move, |
|
1779 pre_arg_words, rbx_temp, rdx_temp); |
|
1780 |
|
1781 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget); |
|
1782 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
1783 } |
|
1784 break; |
|
1785 |
|
1786 case _adapter_drop_args: |
|
1787 { |
|
1788 // 'argslot' is the position of the first argument to nuke |
|
1789 __ movl(rax_argslot, rcx_amh_vmargslot); |
|
1790 __ lea(rax_argslot, __ argument_address(rax_argslot)); |
|
1791 |
|
1792 // (must do previous push after argslot address is taken) |
|
1793 |
|
1794 // 'stack_move' is number of words to drop |
|
1795 Register rdi_stack_move = rdi_temp; |
|
1796 load_stack_move(_masm, rdi_stack_move, rcx_recv, false); |
|
1797 remove_arg_slots(_masm, rdi_stack_move, |
|
1798 rax_argslot, rbx_temp, rdx_temp); |
|
1799 |
|
1800 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget); |
|
1801 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
1802 } |
|
1803 break; |
|
1804 |
|
1805 case _adapter_collect_args: |
|
1806 case _adapter_fold_args: |
|
1807 case _adapter_spread_args: |
|
1808 // handled completely by optimized cases |
|
1809 __ stop("init_AdapterMethodHandle should not issue this"); |
|
1810 break; |
|
1811 |
|
1812 case _adapter_opt_collect_ref: |
|
1813 case _adapter_opt_collect_int: |
|
1814 case _adapter_opt_collect_long: |
|
1815 case _adapter_opt_collect_float: |
|
1816 case _adapter_opt_collect_double: |
|
1817 case _adapter_opt_collect_void: |
|
1818 case _adapter_opt_collect_0_ref: |
|
1819 case _adapter_opt_collect_1_ref: |
|
1820 case _adapter_opt_collect_2_ref: |
|
1821 case _adapter_opt_collect_3_ref: |
|
1822 case _adapter_opt_collect_4_ref: |
|
1823 case _adapter_opt_collect_5_ref: |
|
1824 case _adapter_opt_filter_S0_ref: |
|
1825 case _adapter_opt_filter_S1_ref: |
|
1826 case _adapter_opt_filter_S2_ref: |
|
1827 case _adapter_opt_filter_S3_ref: |
|
1828 case _adapter_opt_filter_S4_ref: |
|
1829 case _adapter_opt_filter_S5_ref: |
|
1830 case _adapter_opt_collect_2_S0_ref: |
|
1831 case _adapter_opt_collect_2_S1_ref: |
|
1832 case _adapter_opt_collect_2_S2_ref: |
|
1833 case _adapter_opt_collect_2_S3_ref: |
|
1834 case _adapter_opt_collect_2_S4_ref: |
|
1835 case _adapter_opt_collect_2_S5_ref: |
|
1836 case _adapter_opt_fold_ref: |
|
1837 case _adapter_opt_fold_int: |
|
1838 case _adapter_opt_fold_long: |
|
1839 case _adapter_opt_fold_float: |
|
1840 case _adapter_opt_fold_double: |
|
1841 case _adapter_opt_fold_void: |
|
1842 case _adapter_opt_fold_1_ref: |
|
1843 case _adapter_opt_fold_2_ref: |
|
1844 case _adapter_opt_fold_3_ref: |
|
1845 case _adapter_opt_fold_4_ref: |
|
1846 case _adapter_opt_fold_5_ref: |
|
1847 { |
|
1848 // Given a fresh incoming stack frame, build a new ricochet frame. |
|
1849 // On entry, TOS points at a return PC, and RBP is the callers frame ptr. |
|
1850 // RSI/R13 has the caller's exact stack pointer, which we must also preserve. |
|
1851 // RCX contains an AdapterMethodHandle of the indicated kind. |
|
1852 |
|
1853 // Relevant AMH fields: |
|
1854 // amh.vmargslot: |
|
1855 // points to the trailing edge of the arguments |
|
1856 // to filter, collect, or fold. For a boxing operation, |
|
1857 // it points just after the single primitive value. |
|
1858 // amh.argument: |
|
1859 // recursively called MH, on |collect| arguments |
|
1860 // amh.vmtarget: |
|
1861 // final destination MH, on return value, etc. |
|
1862 // amh.conversion.dest: |
|
1863 // tells what is the type of the return value |
|
1864 // (not needed here, since dest is also derived from ek) |
|
1865 // amh.conversion.vminfo: |
|
1866 // points to the trailing edge of the return value |
|
1867 // when the vmtarget is to be called; this is |
|
1868 // equal to vmargslot + (retained ? |collect| : 0) |
|
1869 |
|
1870 // Pass 0 or more argument slots to the recursive target. |
|
1871 int collect_count_constant = ek_adapter_opt_collect_count(ek); |
|
1872 |
|
1873 // The collected arguments are copied from the saved argument list: |
|
1874 int collect_slot_constant = ek_adapter_opt_collect_slot(ek); |
|
1875 |
|
1876 assert(ek_orig == _adapter_collect_args || |
|
1877 ek_orig == _adapter_fold_args, ""); |
|
1878 bool retain_original_args = (ek_orig == _adapter_fold_args); |
|
1879 |
|
1880 // The return value is replaced (or inserted) at the 'vminfo' argslot. |
|
1881 // Sometimes we can compute this statically. |
|
1882 int dest_slot_constant = -1; |
|
1883 if (!retain_original_args) |
|
1884 dest_slot_constant = collect_slot_constant; |
|
1885 else if (collect_slot_constant >= 0 && collect_count_constant >= 0) |
|
1886 // We are preserving all the arguments, and the return value is prepended, |
|
1887 // so the return slot is to the left (above) the |collect| sequence. |
|
1888 dest_slot_constant = collect_slot_constant + collect_count_constant; |
|
1889 |
|
1890 // Replace all those slots by the result of the recursive call. |
|
1891 // The result type can be one of ref, int, long, float, double, void. |
|
1892 // In the case of void, nothing is pushed on the stack after return. |
|
1893 BasicType dest = ek_adapter_opt_collect_type(ek); |
|
1894 assert(dest == type2wfield[dest], "dest is a stack slot type"); |
|
1895 int dest_count = type2size[dest]; |
|
1896 assert(dest_count == 1 || dest_count == 2 || (dest_count == 0 && dest == T_VOID), "dest has a size"); |
|
1897 |
|
1898 // Choose a return continuation. |
|
1899 EntryKind ek_ret = _adapter_opt_return_any; |
|
1900 if (dest != T_CONFLICT && OptimizeMethodHandles) { |
|
1901 switch (dest) { |
|
1902 case T_INT : ek_ret = _adapter_opt_return_int; break; |
|
1903 case T_LONG : ek_ret = _adapter_opt_return_long; break; |
|
1904 case T_FLOAT : ek_ret = _adapter_opt_return_float; break; |
|
1905 case T_DOUBLE : ek_ret = _adapter_opt_return_double; break; |
|
1906 case T_OBJECT : ek_ret = _adapter_opt_return_ref; break; |
|
1907 case T_VOID : ek_ret = _adapter_opt_return_void; break; |
|
1908 default : ShouldNotReachHere(); |
|
1909 } |
|
1910 if (dest == T_OBJECT && dest_slot_constant >= 0) { |
|
1911 EntryKind ek_try = EntryKind(_adapter_opt_return_S0_ref + dest_slot_constant); |
|
1912 if (ek_try <= _adapter_opt_return_LAST && |
|
1913 ek_adapter_opt_return_slot(ek_try) == dest_slot_constant) { |
|
1914 ek_ret = ek_try; |
|
1915 } |
|
1916 } |
|
1917 assert(ek_adapter_opt_return_type(ek_ret) == dest, ""); |
|
1918 } |
|
1919 |
|
1920 // Already pushed: ... keep1 | collect | keep2 | sender_pc | |
|
1921 // push(sender_pc); |
|
1922 |
|
1923 // Compute argument base: |
|
1924 Register rax_argv = rax_argslot; |
|
1925 __ lea(rax_argv, __ argument_address(constant(0))); |
|
1926 |
|
1927 // Push a few extra argument words, if we need them to store the return value. |
|
1928 { |
|
1929 int extra_slots = 0; |
|
1930 if (retain_original_args) { |
|
1931 extra_slots = dest_count; |
|
1932 } else if (collect_count_constant == -1) { |
|
1933 extra_slots = dest_count; // collect_count might be zero; be generous |
|
1934 } else if (dest_count > collect_count_constant) { |
|
1935 extra_slots = (dest_count - collect_count_constant); |
|
1936 } else { |
|
1937 // else we know we have enough dead space in |collect| to repurpose for return values |
|
1938 } |
|
1939 DEBUG_ONLY(extra_slots += 1); |
|
1940 if (extra_slots > 0) { |
|
1941 __ pop(rbx_temp); // return value |
|
1942 __ subptr(rsp, (extra_slots * Interpreter::stackElementSize)); |
|
1943 // Push guard word #2 in debug mode. |
|
1944 DEBUG_ONLY(__ movptr(Address(rsp, 0), (int32_t) RicochetFrame::MAGIC_NUMBER_2)); |
|
1945 __ push(rbx_temp); |
|
1946 } |
|
1947 } |
|
1948 |
|
1949 RicochetFrame::enter_ricochet_frame(_masm, rcx_recv, rax_argv, |
|
1950 entry(ek_ret)->from_interpreted_entry(), rbx_temp); |
|
1951 |
|
1952 // Now pushed: ... keep1 | collect | keep2 | RF | |
|
1953 // some handy frame slots: |
|
1954 Address exact_sender_sp_addr = RicochetFrame::frame_address(RicochetFrame::exact_sender_sp_offset_in_bytes()); |
|
1955 Address conversion_addr = RicochetFrame::frame_address(RicochetFrame::conversion_offset_in_bytes()); |
|
1956 Address saved_args_base_addr = RicochetFrame::frame_address(RicochetFrame::saved_args_base_offset_in_bytes()); |
|
1957 |
|
1958 #ifdef ASSERT |
|
1959 if (VerifyMethodHandles && dest != T_CONFLICT) { |
|
1960 BLOCK_COMMENT("verify AMH.conv.dest"); |
|
1961 load_conversion_dest_type(_masm, rbx_temp, conversion_addr); |
|
1962 Label L_dest_ok; |
|
1963 __ cmpl(rbx_temp, (int) dest); |
|
1964 __ jcc(Assembler::equal, L_dest_ok); |
|
1965 if (dest == T_INT) { |
|
1966 for (int bt = T_BOOLEAN; bt < T_INT; bt++) { |
|
1967 if (is_subword_type(BasicType(bt))) { |
|
1968 __ cmpl(rbx_temp, (int) bt); |
|
1969 __ jcc(Assembler::equal, L_dest_ok); |
|
1970 } |
|
1971 } |
|
1972 } |
|
1973 __ stop("bad dest in AMH.conv"); |
|
1974 __ BIND(L_dest_ok); |
|
1975 } |
|
1976 #endif //ASSERT |
|
1977 |
|
1978 // Find out where the original copy of the recursive argument sequence begins. |
|
1979 Register rax_coll = rax_argv; |
|
1980 { |
|
1981 RegisterOrConstant collect_slot = collect_slot_constant; |
|
1982 if (collect_slot_constant == -1) { |
|
1983 __ movl(rdi_temp, rcx_amh_vmargslot); |
|
1984 collect_slot = rdi_temp; |
|
1985 } |
|
1986 if (collect_slot_constant != 0) |
|
1987 __ lea(rax_coll, Address(rax_argv, collect_slot, Interpreter::stackElementScale())); |
|
1988 // rax_coll now points at the trailing edge of |collect| and leading edge of |keep2| |
|
1989 } |
|
1990 |
|
1991 // Replace the old AMH with the recursive MH. (No going back now.) |
|
1992 // In the case of a boxing call, the recursive call is to a 'boxer' method, |
|
1993 // such as Integer.valueOf or Long.valueOf. In the case of a filter |
|
1994 // or collect call, it will take one or more arguments, transform them, |
|
1995 // and return some result, to store back into argument_base[vminfo]. |
|
1996 __ load_heap_oop(rcx_recv, rcx_amh_argument); |
|
1997 if (VerifyMethodHandles) verify_method_handle(_masm, rcx_recv); |
|
1998 |
|
1999 // Push a space for the recursively called MH first: |
|
2000 __ push((int32_t)NULL_WORD); |
|
2001 |
|
2002 // Calculate |collect|, the number of arguments we are collecting. |
|
2003 Register rdi_collect_count = rdi_temp; |
|
2004 RegisterOrConstant collect_count; |
|
2005 if (collect_count_constant >= 0) { |
|
2006 collect_count = collect_count_constant; |
|
2007 } else { |
|
2008 __ load_method_handle_vmslots(rdi_collect_count, rcx_recv, rdx_temp); |
|
2009 collect_count = rdi_collect_count; |
|
2010 } |
|
2011 #ifdef ASSERT |
|
2012 if (VerifyMethodHandles && collect_count_constant >= 0) { |
|
2013 __ load_method_handle_vmslots(rbx_temp, rcx_recv, rdx_temp); |
|
2014 Label L_count_ok; |
|
2015 __ cmpl(rbx_temp, collect_count_constant); |
|
2016 __ jcc(Assembler::equal, L_count_ok); |
|
2017 __ stop("bad vminfo in AMH.conv"); |
|
2018 __ BIND(L_count_ok); |
|
2019 } |
|
2020 #endif //ASSERT |
|
2021 |
|
2022 // copy |collect| slots directly to TOS: |
|
2023 push_arg_slots(_masm, rax_coll, collect_count, 0, rbx_temp, rdx_temp); |
|
2024 // Now pushed: ... keep1 | collect | keep2 | RF... | collect | |
|
2025 // rax_coll still points at the trailing edge of |collect| and leading edge of |keep2| |
|
2026 |
|
2027 // If necessary, adjust the saved arguments to make room for the eventual return value. |
|
2028 // Normal adjustment: ... keep1 | +dest+ | -collect- | keep2 | RF... | collect | |
|
2029 // If retaining args: ... keep1 | +dest+ | collect | keep2 | RF... | collect | |
|
2030 // In the non-retaining case, this might move keep2 either up or down. |
|
2031 // We don't have to copy the whole | RF... collect | complex, |
|
2032 // but we must adjust RF.saved_args_base. |
|
2033 // Also, from now on, we will forget about the original copy of |collect|. |
|
2034 // If we are retaining it, we will treat it as part of |keep2|. |
|
2035 // For clarity we will define |keep3| = |collect|keep2| or |keep2|. |
|
2036 |
|
2037 BLOCK_COMMENT("adjust trailing arguments {"); |
|
2038 // Compare the sizes of |+dest+| and |-collect-|, which are opposed opening and closing movements. |
|
2039 int open_count = dest_count; |
|
2040 RegisterOrConstant close_count = collect_count_constant; |
|
2041 Register rdi_close_count = rdi_collect_count; |
|
2042 if (retain_original_args) { |
|
2043 close_count = constant(0); |
|
2044 } else if (collect_count_constant == -1) { |
|
2045 close_count = rdi_collect_count; |
|
2046 } |
|
2047 |
|
2048 // How many slots need moving? This is simply dest_slot (0 => no |keep3|). |
|
2049 RegisterOrConstant keep3_count; |
|
2050 Register rsi_keep3_count = rsi; // can repair from RF.exact_sender_sp |
|
2051 if (dest_slot_constant >= 0) { |
|
2052 keep3_count = dest_slot_constant; |
|
2053 } else { |
|
2054 load_conversion_vminfo(_masm, rsi_keep3_count, conversion_addr); |
|
2055 keep3_count = rsi_keep3_count; |
|
2056 } |
|
2057 #ifdef ASSERT |
|
2058 if (VerifyMethodHandles && dest_slot_constant >= 0) { |
|
2059 load_conversion_vminfo(_masm, rbx_temp, conversion_addr); |
|
2060 Label L_vminfo_ok; |
|
2061 __ cmpl(rbx_temp, dest_slot_constant); |
|
2062 __ jcc(Assembler::equal, L_vminfo_ok); |
|
2063 __ stop("bad vminfo in AMH.conv"); |
|
2064 __ BIND(L_vminfo_ok); |
|
2065 } |
|
2066 #endif //ASSERT |
|
2067 |
|
2068 // tasks remaining: |
|
2069 bool move_keep3 = (!keep3_count.is_constant() || keep3_count.as_constant() != 0); |
|
2070 bool stomp_dest = (NOT_DEBUG(dest == T_OBJECT) DEBUG_ONLY(dest_count != 0)); |
|
2071 bool fix_arg_base = (!close_count.is_constant() || open_count != close_count.as_constant()); |
|
2072 |
|
2073 if (stomp_dest | fix_arg_base) { |
|
2074 // we will probably need an updated rax_argv value |
|
2075 if (collect_slot_constant >= 0) { |
|
2076 // rax_coll already holds the leading edge of |keep2|, so tweak it |
|
2077 assert(rax_coll == rax_argv, "elided a move"); |
|
2078 if (collect_slot_constant != 0) |
|
2079 __ subptr(rax_argv, collect_slot_constant * Interpreter::stackElementSize); |
|
2080 } else { |
|
2081 // Just reload from RF.saved_args_base. |
|
2082 __ movptr(rax_argv, saved_args_base_addr); |
|
2083 } |
|
2084 } |
|
2085 |
|
2086 // Old and new argument locations (based at slot 0). |
|
2087 // Net shift (&new_argv - &old_argv) is (close_count - open_count). |
|
2088 bool zero_open_count = (open_count == 0); // remember this bit of info |
|
2089 if (move_keep3 && fix_arg_base) { |
|
2090 // It will be easier to have everything in one register: |
|
2091 if (close_count.is_register()) { |
|
2092 // Deduct open_count from close_count register to get a clean +/- value. |
|
2093 __ subptr(close_count.as_register(), open_count); |
|
2094 } else { |
|
2095 close_count = close_count.as_constant() - open_count; |
|
2096 } |
|
2097 open_count = 0; |
|
2098 } |
|
2099 Address old_argv(rax_argv, 0); |
|
2100 Address new_argv(rax_argv, close_count, Interpreter::stackElementScale(), |
|
2101 - open_count * Interpreter::stackElementSize); |
|
2102 |
|
2103 // First decide if any actual data are to be moved. |
|
2104 // We can skip if (a) |keep3| is empty, or (b) the argument list size didn't change. |
|
2105 // (As it happens, all movements involve an argument list size change.) |
|
2106 |
|
2107 // If there are variable parameters, use dynamic checks to skip around the whole mess. |
|
2108 Label L_done; |
|
2109 if (!keep3_count.is_constant()) { |
|
2110 __ testl(keep3_count.as_register(), keep3_count.as_register()); |
|
2111 __ jcc(Assembler::zero, L_done); |
|
2112 } |
|
2113 if (!close_count.is_constant()) { |
|
2114 __ cmpl(close_count.as_register(), open_count); |
|
2115 __ jcc(Assembler::equal, L_done); |
|
2116 } |
|
2117 |
|
2118 if (move_keep3 && fix_arg_base) { |
|
2119 bool emit_move_down = false, emit_move_up = false, emit_guard = false; |
|
2120 if (!close_count.is_constant()) { |
|
2121 emit_move_down = emit_guard = !zero_open_count; |
|
2122 emit_move_up = true; |
|
2123 } else if (open_count != close_count.as_constant()) { |
|
2124 emit_move_down = (open_count > close_count.as_constant()); |
|
2125 emit_move_up = !emit_move_down; |
|
2126 } |
|
2127 Label L_move_up; |
|
2128 if (emit_guard) { |
|
2129 __ cmpl(close_count.as_register(), open_count); |
|
2130 __ jcc(Assembler::greater, L_move_up); |
|
2131 } |
|
2132 |
|
2133 if (emit_move_down) { |
|
2134 // Move arguments down if |+dest+| > |-collect-| |
|
2135 // (This is rare, except when arguments are retained.) |
|
2136 // This opens space for the return value. |
|
2137 if (keep3_count.is_constant()) { |
|
2138 for (int i = 0; i < keep3_count.as_constant(); i++) { |
|
2139 __ movptr(rdx_temp, old_argv.plus_disp(i * Interpreter::stackElementSize)); |
|
2140 __ movptr( new_argv.plus_disp(i * Interpreter::stackElementSize), rdx_temp); |
|
2141 } |
|
2142 } else { |
|
2143 Register rbx_argv_top = rbx_temp; |
|
2144 __ lea(rbx_argv_top, old_argv.plus_disp(keep3_count, Interpreter::stackElementScale())); |
|
2145 move_arg_slots_down(_masm, |
|
2146 old_argv, // beginning of old argv |
|
2147 rbx_argv_top, // end of old argv |
|
2148 close_count, // distance to move down (must be negative) |
|
2149 rax_argv, rdx_temp); |
|
2150 // Used argv as an iteration variable; reload from RF.saved_args_base. |
|
2151 __ movptr(rax_argv, saved_args_base_addr); |
|
2152 } |
|
2153 } |
|
2154 |
|
2155 if (emit_guard) { |
|
2156 __ jmp(L_done); // assumes emit_move_up is true also |
|
2157 __ BIND(L_move_up); |
|
2158 } |
|
2159 |
|
2160 if (emit_move_up) { |
|
2161 |
|
2162 // Move arguments up if |+dest+| < |-collect-| |
|
2163 // (This is usual, except when |keep3| is empty.) |
|
2164 // This closes up the space occupied by the now-deleted collect values. |
|
2165 if (keep3_count.is_constant()) { |
|
2166 for (int i = keep3_count.as_constant() - 1; i >= 0; i--) { |
|
2167 __ movptr(rdx_temp, old_argv.plus_disp(i * Interpreter::stackElementSize)); |
|
2168 __ movptr( new_argv.plus_disp(i * Interpreter::stackElementSize), rdx_temp); |
|
2169 } |
|
2170 } else { |
|
2171 Address argv_top = old_argv.plus_disp(keep3_count, Interpreter::stackElementScale()); |
|
2172 move_arg_slots_up(_masm, |
|
2173 rax_argv, // beginning of old argv |
|
2174 argv_top, // end of old argv |
|
2175 close_count, // distance to move up (must be positive) |
|
2176 rbx_temp, rdx_temp); |
|
2177 } |
|
2178 } |
|
2179 } |
|
2180 __ BIND(L_done); |
|
2181 |
|
2182 if (fix_arg_base) { |
|
2183 // adjust RF.saved_args_base by adding (close_count - open_count) |
|
2184 if (!new_argv.is_same_address(Address(rax_argv, 0))) |
|
2185 __ lea(rax_argv, new_argv); |
|
2186 __ movptr(saved_args_base_addr, rax_argv); |
|
2187 } |
|
2188 |
|
2189 if (stomp_dest) { |
|
2190 // Stomp the return slot, so it doesn't hold garbage. |
|
2191 // This isn't strictly necessary, but it may help detect bugs. |
|
2192 int forty_two = RicochetFrame::RETURN_VALUE_PLACEHOLDER; |
|
2193 __ movptr(Address(rax_argv, keep3_count, Address::times_ptr), |
|
2194 (int32_t) forty_two); |
|
2195 // uses rsi_keep3_count |
|
2196 } |
|
2197 BLOCK_COMMENT("} adjust trailing arguments"); |
|
2198 |
|
2199 BLOCK_COMMENT("do_recursive_call"); |
|
2200 __ mov(saved_last_sp, rsp); // set rsi/r13 for callee |
|
2201 __ pushptr(ExternalAddress(SharedRuntime::ricochet_blob()->bounce_addr()).addr()); |
|
2202 // The globally unique bounce address has two purposes: |
|
2203 // 1. It helps the JVM recognize this frame (frame::is_ricochet_frame). |
|
2204 // 2. When returned to, it cuts back the stack and redirects control flow |
|
2205 // to the return handler. |
|
2206 // The return handler will further cut back the stack when it takes |
|
2207 // down the RF. Perhaps there is a way to streamline this further. |
|
2208 |
|
2209 // State during recursive call: |
|
2210 // ... keep1 | dest | dest=42 | keep3 | RF... | collect | bounce_pc | |
|
2211 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
2212 |
|
2213 break; |
|
2214 } |
|
2215 |
|
2216 case _adapter_opt_return_ref: |
|
2217 case _adapter_opt_return_int: |
|
2218 case _adapter_opt_return_long: |
|
2219 case _adapter_opt_return_float: |
|
2220 case _adapter_opt_return_double: |
|
2221 case _adapter_opt_return_void: |
|
2222 case _adapter_opt_return_S0_ref: |
|
2223 case _adapter_opt_return_S1_ref: |
|
2224 case _adapter_opt_return_S2_ref: |
|
2225 case _adapter_opt_return_S3_ref: |
|
2226 case _adapter_opt_return_S4_ref: |
|
2227 case _adapter_opt_return_S5_ref: |
|
2228 { |
|
2229 BasicType dest_type_constant = ek_adapter_opt_return_type(ek); |
|
2230 int dest_slot_constant = ek_adapter_opt_return_slot(ek); |
|
2231 |
|
2232 if (VerifyMethodHandles) RicochetFrame::verify_clean(_masm); |
|
2233 |
|
2234 if (dest_slot_constant == -1) { |
|
2235 // The current stub is a general handler for this dest_type. |
|
2236 // It can be called from _adapter_opt_return_any below. |
|
2237 // Stash the address in a little table. |
|
2238 assert((dest_type_constant & CONV_TYPE_MASK) == dest_type_constant, "oob"); |
|
2239 address return_handler = __ pc(); |
|
2240 _adapter_return_handlers[dest_type_constant] = return_handler; |
|
2241 if (dest_type_constant == T_INT) { |
|
2242 // do the subword types too |
|
2243 for (int bt = T_BOOLEAN; bt < T_INT; bt++) { |
|
2244 if (is_subword_type(BasicType(bt)) && |
|
2245 _adapter_return_handlers[bt] == NULL) { |
|
2246 _adapter_return_handlers[bt] = return_handler; |
|
2247 } |
|
2248 } |
|
2249 } |
|
2250 } |
|
2251 |
|
2252 Register rbx_arg_base = rbx_temp; |
|
2253 assert_different_registers(rax, rdx, // possibly live return value registers |
|
2254 rdi_temp, rbx_arg_base); |
|
2255 |
|
2256 Address conversion_addr = RicochetFrame::frame_address(RicochetFrame::conversion_offset_in_bytes()); |
|
2257 Address saved_args_base_addr = RicochetFrame::frame_address(RicochetFrame::saved_args_base_offset_in_bytes()); |
|
2258 |
|
2259 __ movptr(rbx_arg_base, saved_args_base_addr); |
|
2260 RegisterOrConstant dest_slot = dest_slot_constant; |
|
2261 if (dest_slot_constant == -1) { |
|
2262 load_conversion_vminfo(_masm, rdi_temp, conversion_addr); |
|
2263 dest_slot = rdi_temp; |
|
2264 } |
|
2265 // Store the result back into the argslot. |
|
2266 // This code uses the interpreter calling sequence, in which the return value |
|
2267 // is usually left in the TOS register, as defined by InterpreterMacroAssembler::pop. |
|
2268 // There are certain irregularities with floating point values, which can be seen |
|
2269 // in TemplateInterpreterGenerator::generate_return_entry_for. |
|
2270 move_return_value(_masm, dest_type_constant, Address(rbx_arg_base, dest_slot, Interpreter::stackElementScale())); |
|
2271 |
|
2272 RicochetFrame::leave_ricochet_frame(_masm, rcx_recv, rbx_arg_base, rdx_temp); |
|
2273 __ push(rdx_temp); // repush the return PC |
|
2274 |
|
2275 // Load the final target and go. |
|
2276 if (VerifyMethodHandles) verify_method_handle(_masm, rcx_recv); |
|
2277 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
2278 __ hlt(); // -------------------- |
|
2279 break; |
|
2280 } |
|
2281 |
|
2282 case _adapter_opt_return_any: |
|
2283 { |
|
2284 if (VerifyMethodHandles) RicochetFrame::verify_clean(_masm); |
|
2285 Register rdi_conv = rdi_temp; |
|
2286 assert_different_registers(rax, rdx, // possibly live return value registers |
|
2287 rdi_conv, rbx_temp); |
|
2288 |
|
2289 Address conversion_addr = RicochetFrame::frame_address(RicochetFrame::conversion_offset_in_bytes()); |
|
2290 load_conversion_dest_type(_masm, rdi_conv, conversion_addr); |
|
2291 __ lea(rbx_temp, ExternalAddress((address) &_adapter_return_handlers[0])); |
|
2292 __ movptr(rbx_temp, Address(rbx_temp, rdi_conv, Address::times_ptr)); |
|
2293 |
|
2294 #ifdef ASSERT |
|
2295 { Label L_badconv; |
|
2296 __ testptr(rbx_temp, rbx_temp); |
|
2297 __ jccb(Assembler::zero, L_badconv); |
|
2298 __ jmp(rbx_temp); |
|
2299 __ bind(L_badconv); |
|
2300 __ stop("bad method handle return"); |
|
2301 } |
|
2302 #else //ASSERT |
|
2303 __ jmp(rbx_temp); |
|
2304 #endif //ASSERT |
|
2305 break; |
|
2306 } |
|
2307 |
|
2308 case _adapter_opt_spread_0: |
|
2309 case _adapter_opt_spread_1_ref: |
|
2310 case _adapter_opt_spread_2_ref: |
|
2311 case _adapter_opt_spread_3_ref: |
|
2312 case _adapter_opt_spread_4_ref: |
|
2313 case _adapter_opt_spread_5_ref: |
|
2314 case _adapter_opt_spread_ref: |
|
2315 case _adapter_opt_spread_byte: |
|
2316 case _adapter_opt_spread_char: |
|
2317 case _adapter_opt_spread_short: |
|
2318 case _adapter_opt_spread_int: |
|
2319 case _adapter_opt_spread_long: |
|
2320 case _adapter_opt_spread_float: |
|
2321 case _adapter_opt_spread_double: |
|
2322 { |
|
2323 // spread an array out into a group of arguments |
|
2324 int length_constant = ek_adapter_opt_spread_count(ek); |
|
2325 bool length_can_be_zero = (length_constant == 0); |
|
2326 if (length_constant < 0) { |
|
2327 // some adapters with variable length must handle the zero case |
|
2328 if (!OptimizeMethodHandles || |
|
2329 ek_adapter_opt_spread_type(ek) != T_OBJECT) |
|
2330 length_can_be_zero = true; |
|
2331 } |
|
2332 |
|
2333 // find the address of the array argument |
|
2334 __ movl(rax_argslot, rcx_amh_vmargslot); |
|
2335 __ lea(rax_argslot, __ argument_address(rax_argslot)); |
|
2336 |
|
2337 // grab another temp |
|
2338 Register rsi_temp = rsi; |
|
2339 |
|
2340 // arx_argslot points both to the array and to the first output arg |
|
2341 vmarg = Address(rax_argslot, 0); |
|
2342 |
|
2343 // Get the array value. |
|
2344 Register rdi_array = rdi_temp; |
|
2345 Register rdx_array_klass = rdx_temp; |
|
2346 BasicType elem_type = ek_adapter_opt_spread_type(ek); |
|
2347 int elem_slots = type2size[elem_type]; // 1 or 2 |
|
2348 int array_slots = 1; // array is always a T_OBJECT |
|
2349 int length_offset = arrayOopDesc::length_offset_in_bytes(); |
|
2350 int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type); |
|
2351 __ movptr(rdi_array, vmarg); |
|
2352 |
|
2353 Label L_array_is_empty, L_insert_arg_space, L_copy_args, L_args_done; |
|
2354 if (length_can_be_zero) { |
|
2355 // handle the null pointer case, if zero is allowed |
|
2356 Label L_skip; |
|
2357 if (length_constant < 0) { |
|
2358 load_conversion_vminfo(_masm, rbx_temp, rcx_amh_conversion); |
|
2359 __ testl(rbx_temp, rbx_temp); |
|
2360 __ jcc(Assembler::notZero, L_skip); |
|
2361 } |
|
2362 __ testptr(rdi_array, rdi_array); |
|
2363 __ jcc(Assembler::notZero, L_skip); |
|
2364 |
|
2365 // If 'rsi' contains the 'saved_last_sp' (this is only the |
|
2366 // case in a 32-bit version of the VM) we have to save 'rsi' |
|
2367 // on the stack because later on (at 'L_array_is_empty') 'rsi' |
|
2368 // will be overwritten. |
|
2369 { if (rsi_temp == saved_last_sp) __ push(saved_last_sp); } |
|
2370 // Also prepare a handy macro which restores 'rsi' if required. |
|
2371 #define UNPUSH_RSI \ |
|
2372 { if (rsi_temp == saved_last_sp) __ pop(saved_last_sp); } |
|
2373 |
|
2374 __ jmp(L_array_is_empty); |
|
2375 __ bind(L_skip); |
|
2376 } |
|
2377 __ null_check(rdi_array, oopDesc::klass_offset_in_bytes()); |
|
2378 __ load_klass(rdx_array_klass, rdi_array); |
|
2379 |
|
2380 // Save 'rsi' if required (see comment above). Do this only |
|
2381 // after the null check such that the exception handler which is |
|
2382 // called in the case of a null pointer exception will not be |
|
2383 // confused by the extra value on the stack (it expects the |
|
2384 // return pointer on top of the stack) |
|
2385 { if (rsi_temp == saved_last_sp) __ push(saved_last_sp); } |
|
2386 |
|
2387 // Check the array type. |
|
2388 Register rbx_klass = rbx_temp; |
|
2389 __ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object! |
|
2390 load_klass_from_Class(_masm, rbx_klass); |
|
2391 |
|
2392 Label ok_array_klass, bad_array_klass, bad_array_length; |
|
2393 __ check_klass_subtype(rdx_array_klass, rbx_klass, rsi_temp, ok_array_klass); |
|
2394 // If we get here, the type check failed! |
|
2395 __ jmp(bad_array_klass); |
|
2396 __ BIND(ok_array_klass); |
|
2397 |
|
2398 // Check length. |
|
2399 if (length_constant >= 0) { |
|
2400 __ cmpl(Address(rdi_array, length_offset), length_constant); |
|
2401 } else { |
|
2402 Register rbx_vminfo = rbx_temp; |
|
2403 load_conversion_vminfo(_masm, rbx_vminfo, rcx_amh_conversion); |
|
2404 __ cmpl(rbx_vminfo, Address(rdi_array, length_offset)); |
|
2405 } |
|
2406 __ jcc(Assembler::notEqual, bad_array_length); |
|
2407 |
|
2408 Register rdx_argslot_limit = rdx_temp; |
|
2409 |
|
2410 // Array length checks out. Now insert any required stack slots. |
|
2411 if (length_constant == -1) { |
|
2412 // Form a pointer to the end of the affected region. |
|
2413 __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize)); |
|
2414 // 'stack_move' is negative number of words to insert |
|
2415 // This number already accounts for elem_slots. |
|
2416 Register rsi_stack_move = rsi_temp; |
|
2417 load_stack_move(_masm, rsi_stack_move, rcx_recv, true); |
|
2418 __ cmpptr(rsi_stack_move, 0); |
|
2419 assert(stack_move_unit() < 0, "else change this comparison"); |
|
2420 __ jcc(Assembler::less, L_insert_arg_space); |
|
2421 __ jcc(Assembler::equal, L_copy_args); |
|
2422 // single argument case, with no array movement |
|
2423 __ BIND(L_array_is_empty); |
|
2424 remove_arg_slots(_masm, -stack_move_unit() * array_slots, |
|
2425 rax_argslot, rbx_temp, rdx_temp); |
|
2426 __ jmp(L_args_done); // no spreading to do |
|
2427 __ BIND(L_insert_arg_space); |
|
2428 // come here in the usual case, stack_move < 0 (2 or more spread arguments) |
|
2429 Register rdi_temp = rdi_array; // spill this |
|
2430 insert_arg_slots(_masm, rsi_stack_move, |
|
2431 rax_argslot, rbx_temp, rdi_temp); |
|
2432 // reload the array since rsi was killed |
|
2433 // reload from rdx_argslot_limit since rax_argslot is now decremented |
|
2434 __ movptr(rdi_array, Address(rdx_argslot_limit, -Interpreter::stackElementSize)); |
|
2435 } else if (length_constant >= 1) { |
|
2436 int new_slots = (length_constant * elem_slots) - array_slots; |
|
2437 insert_arg_slots(_masm, new_slots * stack_move_unit(), |
|
2438 rax_argslot, rbx_temp, rdx_temp); |
|
2439 } else if (length_constant == 0) { |
|
2440 __ BIND(L_array_is_empty); |
|
2441 remove_arg_slots(_masm, -stack_move_unit() * array_slots, |
|
2442 rax_argslot, rbx_temp, rdx_temp); |
|
2443 } else { |
|
2444 ShouldNotReachHere(); |
|
2445 } |
|
2446 |
|
2447 // Copy from the array to the new slots. |
|
2448 // Note: Stack change code preserves integrity of rax_argslot pointer. |
|
2449 // So even after slot insertions, rax_argslot still points to first argument. |
|
2450 // Beware: Arguments that are shallow on the stack are deep in the array, |
|
2451 // and vice versa. So a downward-growing stack (the usual) has to be copied |
|
2452 // elementwise in reverse order from the source array. |
|
2453 __ BIND(L_copy_args); |
|
2454 if (length_constant == -1) { |
|
2455 // [rax_argslot, rdx_argslot_limit) is the area we are inserting into. |
|
2456 // Array element [0] goes at rdx_argslot_limit[-wordSize]. |
|
2457 Register rdi_source = rdi_array; |
|
2458 __ lea(rdi_source, Address(rdi_array, elem0_offset)); |
|
2459 Register rdx_fill_ptr = rdx_argslot_limit; |
|
2460 Label loop; |
|
2461 __ BIND(loop); |
|
2462 __ addptr(rdx_fill_ptr, -Interpreter::stackElementSize * elem_slots); |
|
2463 move_typed_arg(_masm, elem_type, true, |
|
2464 Address(rdx_fill_ptr, 0), Address(rdi_source, 0), |
|
2465 rbx_temp, rsi_temp); |
|
2466 __ addptr(rdi_source, type2aelembytes(elem_type)); |
|
2467 __ cmpptr(rdx_fill_ptr, rax_argslot); |
|
2468 __ jcc(Assembler::above, loop); |
|
2469 } else if (length_constant == 0) { |
|
2470 // nothing to copy |
|
2471 } else { |
|
2472 int elem_offset = elem0_offset; |
|
2473 int slot_offset = length_constant * Interpreter::stackElementSize; |
|
2474 for (int index = 0; index < length_constant; index++) { |
|
2475 slot_offset -= Interpreter::stackElementSize * elem_slots; // fill backward |
|
2476 move_typed_arg(_masm, elem_type, true, |
|
2477 Address(rax_argslot, slot_offset), Address(rdi_array, elem_offset), |
|
2478 rbx_temp, rsi_temp); |
|
2479 elem_offset += type2aelembytes(elem_type); |
|
2480 } |
|
2481 } |
|
2482 __ BIND(L_args_done); |
|
2483 |
|
2484 // Arguments are spread. Move to next method handle. |
|
2485 UNPUSH_RSI; |
|
2486 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget); |
|
2487 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); |
|
2488 |
|
2489 __ bind(bad_array_klass); |
|
2490 UNPUSH_RSI; |
|
2491 assert(!vmarg.uses(rarg2_required), "must be different registers"); |
|
2492 __ load_heap_oop( rarg2_required, Address(rdx_array_klass, java_mirror_offset)); // required type |
|
2493 __ movptr( rarg1_actual, vmarg); // bad array |
|
2494 __ movl( rarg0_code, (int) Bytecodes::_aaload); // who is complaining? |
|
2495 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception))); |
|
2496 |
|
2497 __ bind(bad_array_length); |
|
2498 UNPUSH_RSI; |
|
2499 assert(!vmarg.uses(rarg2_required), "must be different registers"); |
|
2500 __ mov( rarg2_required, rcx_recv); // AMH requiring a certain length |
|
2501 __ movptr( rarg1_actual, vmarg); // bad array |
|
2502 __ movl( rarg0_code, (int) Bytecodes::_arraylength); // who is complaining? |
|
2503 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception))); |
|
2504 #undef UNPUSH_RSI |
|
2505 |
|
2506 break; |
|
2507 } |
|
2508 |
|
2509 default: |
|
2510 // do not require all platforms to recognize all adapter types |
|
2511 __ nop(); |
|
2512 return; |
|
2513 } |
|
2514 BLOCK_COMMENT(err_msg("} Entry %s", entry_name(ek))); |
|
2515 __ hlt(); |
|
2516 |
|
2517 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry); |
|
2518 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI |
|
2519 |
|
2520 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie)); |
|
2521 } |
|