Mercurial > hg > truffle
annotate src/cpu/x86/vm/interp_masm_x86_64.cpp @ 255:ef72a36b968e
Merge
author | kvn |
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date | Wed, 30 Jul 2008 09:54:21 -0700 |
parents | d1605aabd0a1 |
children | dc7f315e41f7 1ee8caae33af |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2003-2008 Sun Microsystems, Inc. All Rights Reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_interp_masm_x86_64.cpp.incl" | |
27 | |
28 | |
29 // Implementation of InterpreterMacroAssembler | |
30 | |
31 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point, | |
32 int number_of_arguments) { | |
33 // interpreter specific | |
34 // | |
35 // Note: No need to save/restore bcp & locals (r13 & r14) pointer | |
36 // since these are callee saved registers and no blocking/ | |
37 // GC can happen in leaf calls. | |
38 #ifdef ASSERT | |
39 save_bcp(); | |
40 { | |
41 Label L; | |
42 cmpq(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int)NULL_WORD); | |
43 jcc(Assembler::equal, L); | |
44 stop("InterpreterMacroAssembler::call_VM_leaf_base:" | |
45 " last_sp != NULL"); | |
46 bind(L); | |
47 } | |
48 #endif | |
49 // super call | |
50 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); | |
51 // interpreter specific | |
52 #ifdef ASSERT | |
53 { | |
54 Label L; | |
55 cmpq(r13, Address(rbp, frame::interpreter_frame_bcx_offset * wordSize)); | |
56 jcc(Assembler::equal, L); | |
57 stop("InterpreterMacroAssembler::call_VM_leaf_base:" | |
58 " r13 not callee saved?"); | |
59 bind(L); | |
60 } | |
61 { | |
62 Label L; | |
63 cmpq(r14, Address(rbp, frame::interpreter_frame_locals_offset * wordSize)); | |
64 jcc(Assembler::equal, L); | |
65 stop("InterpreterMacroAssembler::call_VM_leaf_base:" | |
66 " r14 not callee saved?"); | |
67 bind(L); | |
68 } | |
69 #endif | |
70 } | |
71 | |
72 void InterpreterMacroAssembler::call_VM_base(Register oop_result, | |
73 Register java_thread, | |
74 Register last_java_sp, | |
75 address entry_point, | |
76 int number_of_arguments, | |
77 bool check_exceptions) { | |
78 // interpreter specific | |
79 // | |
80 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't | |
81 // really make a difference for these runtime calls, since they are | |
82 // slow anyway. Btw., bcp must be saved/restored since it may change | |
83 // due to GC. | |
84 // assert(java_thread == noreg , "not expecting a precomputed java thread"); | |
85 save_bcp(); | |
86 #ifdef ASSERT | |
87 { | |
88 Label L; | |
89 cmpq(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int)NULL_WORD); | |
90 jcc(Assembler::equal, L); | |
91 stop("InterpreterMacroAssembler::call_VM_leaf_base:" | |
92 " last_sp != NULL"); | |
93 bind(L); | |
94 } | |
95 #endif /* ASSERT */ | |
96 // super call | |
97 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp, | |
98 entry_point, number_of_arguments, | |
99 check_exceptions); | |
100 // interpreter specific | |
101 restore_bcp(); | |
102 restore_locals(); | |
103 } | |
104 | |
105 | |
106 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) { | |
107 if (JvmtiExport::can_pop_frame()) { | |
108 Label L; | |
109 // Initiate popframe handling only if it is not already being | |
110 // processed. If the flag has the popframe_processing bit set, it | |
111 // means that this code is called *during* popframe handling - we | |
112 // don't want to reenter. | |
113 // This method is only called just after the call into the vm in | |
114 // call_VM_base, so the arg registers are available. | |
115 movl(c_rarg0, Address(r15_thread, JavaThread::popframe_condition_offset())); | |
116 testl(c_rarg0, JavaThread::popframe_pending_bit); | |
117 jcc(Assembler::zero, L); | |
118 testl(c_rarg0, JavaThread::popframe_processing_bit); | |
119 jcc(Assembler::notZero, L); | |
120 // Call Interpreter::remove_activation_preserving_args_entry() to get the | |
121 // address of the same-named entrypoint in the generated interpreter code. | |
122 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry)); | |
123 jmp(rax); | |
124 bind(L); | |
125 } | |
126 } | |
127 | |
128 | |
129 void InterpreterMacroAssembler::load_earlyret_value(TosState state) { | |
130 movq(rcx, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); | |
131 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset()); | |
132 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset()); | |
133 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset()); | |
134 switch (state) { | |
135 case atos: movq(rax, oop_addr); | |
136 movptr(oop_addr, NULL_WORD); | |
137 verify_oop(rax, state); break; | |
138 case ltos: movq(rax, val_addr); break; | |
139 case btos: // fall through | |
140 case ctos: // fall through | |
141 case stos: // fall through | |
142 case itos: movl(rax, val_addr); break; | |
143 case ftos: movflt(xmm0, val_addr); break; | |
144 case dtos: movdbl(xmm0, val_addr); break; | |
145 case vtos: /* nothing to do */ break; | |
146 default : ShouldNotReachHere(); | |
147 } | |
148 // Clean up tos value in the thread object | |
149 movl(tos_addr, (int) ilgl); | |
150 movl(val_addr, (int) NULL_WORD); | |
151 } | |
152 | |
153 | |
154 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { | |
155 if (JvmtiExport::can_force_early_return()) { | |
156 Label L; | |
157 movq(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); | |
158 testq(c_rarg0, c_rarg0); | |
159 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; | |
160 | |
161 // Initiate earlyret handling only if it is not already being processed. | |
162 // If the flag has the earlyret_processing bit set, it means that this code | |
163 // is called *during* earlyret handling - we don't want to reenter. | |
164 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_state_offset())); | |
165 cmpl(c_rarg0, JvmtiThreadState::earlyret_pending); | |
166 jcc(Assembler::notEqual, L); | |
167 | |
168 // Call Interpreter::remove_activation_early_entry() to get the address of the | |
169 // same-named entrypoint in the generated interpreter code. | |
170 movq(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); | |
171 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_tos_offset())); | |
172 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), c_rarg0); | |
173 jmp(rax); | |
174 bind(L); | |
175 } | |
176 } | |
177 | |
178 | |
179 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp( | |
180 Register reg, | |
181 int bcp_offset) { | |
182 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); | |
183 movl(reg, Address(r13, bcp_offset)); | |
184 bswapl(reg); | |
185 shrl(reg, 16); | |
186 } | |
187 | |
188 | |
189 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, | |
190 Register index, | |
191 int bcp_offset) { | |
192 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); | |
193 assert(cache != index, "must use different registers"); | |
194 load_unsigned_word(index, Address(r13, bcp_offset)); | |
195 movq(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); | |
196 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); | |
197 // convert from field index to ConstantPoolCacheEntry index | |
198 shll(index, 2); | |
199 } | |
200 | |
201 | |
202 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, | |
203 Register tmp, | |
204 int bcp_offset) { | |
205 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); | |
206 assert(cache != tmp, "must use different register"); | |
207 load_unsigned_word(tmp, Address(r13, bcp_offset)); | |
208 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); | |
209 // convert from field index to ConstantPoolCacheEntry index | |
210 // and from word offset to byte offset | |
211 shll(tmp, 2 + LogBytesPerWord); | |
212 movq(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); | |
213 // skip past the header | |
214 addq(cache, in_bytes(constantPoolCacheOopDesc::base_offset())); | |
215 addq(cache, tmp); // construct pointer to cache entry | |
216 } | |
217 | |
218 | |
219 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a | |
220 // subtype of super_klass. | |
221 // | |
222 // Args: | |
223 // rax: superklass | |
224 // Rsub_klass: subklass | |
225 // | |
226 // Kills: | |
227 // rcx, rdi | |
228 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, | |
229 Label& ok_is_subtype) { | |
230 assert(Rsub_klass != rax, "rax holds superklass"); | |
231 assert(Rsub_klass != r14, "r14 holds locals"); | |
232 assert(Rsub_klass != r13, "r13 holds bcp"); | |
233 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); | |
234 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); | |
235 | |
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236 Label not_subtype, not_subtype_pop, loop; |
0 | 237 |
238 // Profile the not-null value's klass. | |
239 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, rdi | |
240 | |
241 // Load the super-klass's check offset into rcx | |
242 movl(rcx, Address(rax, sizeof(oopDesc) + | |
243 Klass::super_check_offset_offset_in_bytes())); | |
244 // Load from the sub-klass's super-class display list, or a 1-word | |
245 // cache of the secondary superclass list, or a failing value with a | |
246 // sentinel offset if the super-klass is an interface or | |
247 // exceptionally deep in the Java hierarchy and we have to scan the | |
248 // secondary superclass list the hard way. See if we get an | |
249 // immediate positive hit | |
250 cmpq(rax, Address(Rsub_klass, rcx, Address::times_1)); | |
251 jcc(Assembler::equal,ok_is_subtype); | |
252 | |
253 // Check for immediate negative hit | |
254 cmpl(rcx, sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes()); | |
255 jcc( Assembler::notEqual, not_subtype ); | |
256 // Check for self | |
257 cmpq(Rsub_klass, rax); | |
258 jcc(Assembler::equal, ok_is_subtype); | |
259 | |
260 // Now do a linear scan of the secondary super-klass chain. | |
261 movq(rdi, Address(Rsub_klass, sizeof(oopDesc) + | |
262 Klass::secondary_supers_offset_in_bytes())); | |
263 // rdi holds the objArrayOop of secondary supers. | |
264 // Load the array length | |
265 movl(rcx, Address(rdi, arrayOopDesc::length_offset_in_bytes())); | |
266 // Skip to start of data; also clear Z flag incase rcx is zero | |
267 addq(rdi, arrayOopDesc::base_offset_in_bytes(T_OBJECT)); | |
268 // Scan rcx words at [rdi] for occurance of rax | |
269 // Set NZ/Z based on last compare | |
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270 |
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271 // this part is kind tricky, as values in supers array could be 32 or 64 bit wide |
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272 // and we store values in objArrays always encoded, thus we need to encode value |
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273 // before repne |
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274 if (UseCompressedOops) { |
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275 pushq(rax); |
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276 encode_heap_oop(rax); |
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277 repne_scanl(); |
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278 // Not equal? |
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279 jcc(Assembler::notEqual, not_subtype_pop); |
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280 // restore heap oop here for movq |
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281 popq(rax); |
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282 } else { |
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283 repne_scanq(); |
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284 jcc(Assembler::notEqual, not_subtype); |
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285 } |
0 | 286 // Must be equal but missed in cache. Update cache. |
287 movq(Address(Rsub_klass, sizeof(oopDesc) + | |
288 Klass::secondary_super_cache_offset_in_bytes()), rax); | |
289 jmp(ok_is_subtype); | |
290 | |
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291 bind(not_subtype_pop); |
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292 // restore heap oop here for miss |
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293 if (UseCompressedOops) popq(rax); |
0 | 294 bind(not_subtype); |
295 profile_typecheck_failed(rcx); // blows rcx | |
296 } | |
297 | |
298 | |
299 // Java Expression Stack | |
300 | |
301 #ifdef ASSERT | |
302 // Verifies that the stack tag matches. Must be called before the stack | |
303 // value is popped off the stack. | |
304 void InterpreterMacroAssembler::verify_stack_tag(frame::Tag t) { | |
305 if (TaggedStackInterpreter) { | |
306 frame::Tag tag = t; | |
307 if (t == frame::TagCategory2) { | |
308 tag = frame::TagValue; | |
309 Label hokay; | |
310 cmpq(Address(rsp, 3*wordSize), (int)tag); | |
311 jcc(Assembler::equal, hokay); | |
312 stop("Java Expression stack tag high value is bad"); | |
313 bind(hokay); | |
314 } | |
315 Label okay; | |
316 cmpq(Address(rsp, wordSize), (int)tag); | |
317 jcc(Assembler::equal, okay); | |
318 // Also compare if the stack value is zero, then the tag might | |
319 // not have been set coming from deopt. | |
320 cmpq(Address(rsp, 0), 0); | |
321 jcc(Assembler::equal, okay); | |
322 stop("Java Expression stack tag value is bad"); | |
323 bind(okay); | |
324 } | |
325 } | |
326 #endif // ASSERT | |
327 | |
328 void InterpreterMacroAssembler::pop_ptr(Register r) { | |
329 debug_only(verify_stack_tag(frame::TagReference)); | |
330 popq(r); | |
331 if (TaggedStackInterpreter) addq(rsp, 1 * wordSize); | |
332 } | |
333 | |
334 void InterpreterMacroAssembler::pop_ptr(Register r, Register tag) { | |
335 popq(r); | |
336 if (TaggedStackInterpreter) popq(tag); | |
337 } | |
338 | |
339 void InterpreterMacroAssembler::pop_i(Register r) { | |
340 // XXX can't use popq currently, upper half non clean | |
341 debug_only(verify_stack_tag(frame::TagValue)); | |
342 movl(r, Address(rsp, 0)); | |
343 addq(rsp, wordSize); | |
344 if (TaggedStackInterpreter) addq(rsp, 1 * wordSize); | |
345 } | |
346 | |
347 void InterpreterMacroAssembler::pop_l(Register r) { | |
348 debug_only(verify_stack_tag(frame::TagCategory2)); | |
349 movq(r, Address(rsp, 0)); | |
350 addq(rsp, 2 * Interpreter::stackElementSize()); | |
351 } | |
352 | |
353 void InterpreterMacroAssembler::pop_f(XMMRegister r) { | |
354 debug_only(verify_stack_tag(frame::TagValue)); | |
355 movflt(r, Address(rsp, 0)); | |
356 addq(rsp, wordSize); | |
357 if (TaggedStackInterpreter) addq(rsp, 1 * wordSize); | |
358 } | |
359 | |
360 void InterpreterMacroAssembler::pop_d(XMMRegister r) { | |
361 debug_only(verify_stack_tag(frame::TagCategory2)); | |
362 movdbl(r, Address(rsp, 0)); | |
363 addq(rsp, 2 * Interpreter::stackElementSize()); | |
364 } | |
365 | |
366 void InterpreterMacroAssembler::push_ptr(Register r) { | |
367 if (TaggedStackInterpreter) pushq(frame::TagReference); | |
368 pushq(r); | |
369 } | |
370 | |
371 void InterpreterMacroAssembler::push_ptr(Register r, Register tag) { | |
372 if (TaggedStackInterpreter) pushq(tag); | |
373 pushq(r); | |
374 } | |
375 | |
376 void InterpreterMacroAssembler::push_i(Register r) { | |
377 if (TaggedStackInterpreter) pushq(frame::TagValue); | |
378 pushq(r); | |
379 } | |
380 | |
381 void InterpreterMacroAssembler::push_l(Register r) { | |
382 if (TaggedStackInterpreter) { | |
383 pushq(frame::TagValue); | |
384 subq(rsp, 1 * wordSize); | |
385 pushq(frame::TagValue); | |
386 subq(rsp, 1 * wordSize); | |
387 } else { | |
388 subq(rsp, 2 * wordSize); | |
389 } | |
390 movq(Address(rsp, 0), r); | |
391 } | |
392 | |
393 void InterpreterMacroAssembler::push_f(XMMRegister r) { | |
394 if (TaggedStackInterpreter) pushq(frame::TagValue); | |
395 subq(rsp, wordSize); | |
396 movflt(Address(rsp, 0), r); | |
397 } | |
398 | |
399 void InterpreterMacroAssembler::push_d(XMMRegister r) { | |
400 if (TaggedStackInterpreter) { | |
401 pushq(frame::TagValue); | |
402 subq(rsp, 1 * wordSize); | |
403 pushq(frame::TagValue); | |
404 subq(rsp, 1 * wordSize); | |
405 } else { | |
406 subq(rsp, 2 * wordSize); | |
407 } | |
408 movdbl(Address(rsp, 0), r); | |
409 } | |
410 | |
411 void InterpreterMacroAssembler::pop(TosState state) { | |
412 switch (state) { | |
413 case atos: pop_ptr(); break; | |
414 case btos: | |
415 case ctos: | |
416 case stos: | |
417 case itos: pop_i(); break; | |
418 case ltos: pop_l(); break; | |
419 case ftos: pop_f(); break; | |
420 case dtos: pop_d(); break; | |
421 case vtos: /* nothing to do */ break; | |
422 default: ShouldNotReachHere(); | |
423 } | |
424 verify_oop(rax, state); | |
425 } | |
426 | |
427 void InterpreterMacroAssembler::push(TosState state) { | |
428 verify_oop(rax, state); | |
429 switch (state) { | |
430 case atos: push_ptr(); break; | |
431 case btos: | |
432 case ctos: | |
433 case stos: | |
434 case itos: push_i(); break; | |
435 case ltos: push_l(); break; | |
436 case ftos: push_f(); break; | |
437 case dtos: push_d(); break; | |
438 case vtos: /* nothing to do */ break; | |
439 default : ShouldNotReachHere(); | |
440 } | |
441 } | |
442 | |
443 | |
444 // Tagged stack helpers for swap and dup | |
445 void InterpreterMacroAssembler::load_ptr_and_tag(int n, Register val, | |
446 Register tag) { | |
447 movq(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); | |
448 if (TaggedStackInterpreter) { | |
449 movq(tag, Address(rsp, Interpreter::expr_tag_offset_in_bytes(n))); | |
450 } | |
451 } | |
452 | |
453 void InterpreterMacroAssembler::store_ptr_and_tag(int n, Register val, | |
454 Register tag) { | |
455 movq(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); | |
456 if (TaggedStackInterpreter) { | |
457 movq(Address(rsp, Interpreter::expr_tag_offset_in_bytes(n)), tag); | |
458 } | |
459 } | |
460 | |
461 | |
462 // Tagged local support | |
463 void InterpreterMacroAssembler::tag_local(frame::Tag tag, int n) { | |
464 if (TaggedStackInterpreter) { | |
465 if (tag == frame::TagCategory2) { | |
466 mov64(Address(r14, Interpreter::local_tag_offset_in_bytes(n+1)), | |
467 (intptr_t)frame::TagValue); | |
468 mov64(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), | |
469 (intptr_t)frame::TagValue); | |
470 } else { | |
471 mov64(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), (intptr_t)tag); | |
472 } | |
473 } | |
474 } | |
475 | |
476 void InterpreterMacroAssembler::tag_local(frame::Tag tag, Register idx) { | |
477 if (TaggedStackInterpreter) { | |
478 if (tag == frame::TagCategory2) { | |
479 mov64(Address(r14, idx, Address::times_8, | |
480 Interpreter::local_tag_offset_in_bytes(1)), (intptr_t)frame::TagValue); | |
481 mov64(Address(r14, idx, Address::times_8, | |
482 Interpreter::local_tag_offset_in_bytes(0)), (intptr_t)frame::TagValue); | |
483 } else { | |
484 mov64(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), | |
485 (intptr_t)tag); | |
486 } | |
487 } | |
488 } | |
489 | |
490 void InterpreterMacroAssembler::tag_local(Register tag, Register idx) { | |
491 if (TaggedStackInterpreter) { | |
492 // can only be TagValue or TagReference | |
493 movq(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), tag); | |
494 } | |
495 } | |
496 | |
497 | |
498 void InterpreterMacroAssembler::tag_local(Register tag, int n) { | |
499 if (TaggedStackInterpreter) { | |
500 // can only be TagValue or TagReference | |
501 movq(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), tag); | |
502 } | |
503 } | |
504 | |
505 #ifdef ASSERT | |
506 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, int n) { | |
507 if (TaggedStackInterpreter) { | |
508 frame::Tag t = tag; | |
509 if (tag == frame::TagCategory2) { | |
510 Label nbl; | |
511 t = frame::TagValue; // change to what is stored in locals | |
512 cmpq(Address(r14, Interpreter::local_tag_offset_in_bytes(n+1)), (int)t); | |
513 jcc(Assembler::equal, nbl); | |
514 stop("Local tag is bad for long/double"); | |
515 bind(nbl); | |
516 } | |
517 Label notBad; | |
518 cmpq(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), (int)t); | |
519 jcc(Assembler::equal, notBad); | |
520 // Also compare if the local value is zero, then the tag might | |
521 // not have been set coming from deopt. | |
522 cmpq(Address(r14, Interpreter::local_offset_in_bytes(n)), 0); | |
523 jcc(Assembler::equal, notBad); | |
524 stop("Local tag is bad"); | |
525 bind(notBad); | |
526 } | |
527 } | |
528 | |
529 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, Register idx) { | |
530 if (TaggedStackInterpreter) { | |
531 frame::Tag t = tag; | |
532 if (tag == frame::TagCategory2) { | |
533 Label nbl; | |
534 t = frame::TagValue; // change to what is stored in locals | |
535 cmpq(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(1)), (int)t); | |
536 jcc(Assembler::equal, nbl); | |
537 stop("Local tag is bad for long/double"); | |
538 bind(nbl); | |
539 } | |
540 Label notBad; | |
541 cmpq(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), (int)t); | |
542 jcc(Assembler::equal, notBad); | |
543 // Also compare if the local value is zero, then the tag might | |
544 // not have been set coming from deopt. | |
545 cmpq(Address(r14, idx, Address::times_8, Interpreter::local_offset_in_bytes(0)), 0); | |
546 jcc(Assembler::equal, notBad); | |
547 stop("Local tag is bad"); | |
548 bind(notBad); | |
549 } | |
550 } | |
551 #endif // ASSERT | |
552 | |
553 | |
554 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point) { | |
555 MacroAssembler::call_VM_leaf_base(entry_point, 0); | |
556 } | |
557 | |
558 | |
559 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, | |
560 Register arg_1) { | |
561 if (c_rarg0 != arg_1) { | |
562 movq(c_rarg0, arg_1); | |
563 } | |
564 MacroAssembler::call_VM_leaf_base(entry_point, 1); | |
565 } | |
566 | |
567 | |
568 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, | |
569 Register arg_1, | |
570 Register arg_2) { | |
571 assert(c_rarg0 != arg_2, "smashed argument"); | |
572 assert(c_rarg1 != arg_1, "smashed argument"); | |
573 if (c_rarg0 != arg_1) { | |
574 movq(c_rarg0, arg_1); | |
575 } | |
576 if (c_rarg1 != arg_2) { | |
577 movq(c_rarg1, arg_2); | |
578 } | |
579 MacroAssembler::call_VM_leaf_base(entry_point, 2); | |
580 } | |
581 | |
582 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, | |
583 Register arg_1, | |
584 Register arg_2, | |
585 Register arg_3) { | |
586 assert(c_rarg0 != arg_2, "smashed argument"); | |
587 assert(c_rarg0 != arg_3, "smashed argument"); | |
588 assert(c_rarg1 != arg_1, "smashed argument"); | |
589 assert(c_rarg1 != arg_3, "smashed argument"); | |
590 assert(c_rarg2 != arg_1, "smashed argument"); | |
591 assert(c_rarg2 != arg_2, "smashed argument"); | |
592 if (c_rarg0 != arg_1) { | |
593 movq(c_rarg0, arg_1); | |
594 } | |
595 if (c_rarg1 != arg_2) { | |
596 movq(c_rarg1, arg_2); | |
597 } | |
598 if (c_rarg2 != arg_3) { | |
599 movq(c_rarg2, arg_3); | |
600 } | |
601 MacroAssembler::call_VM_leaf_base(entry_point, 3); | |
602 } | |
603 | |
604 // Jump to from_interpreted entry of a call unless single stepping is possible | |
605 // in this thread in which case we must call the i2i entry | |
606 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { | |
607 // set sender sp | |
608 leaq(r13, Address(rsp, wordSize)); | |
609 // record last_sp | |
610 movq(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), r13); | |
611 | |
612 if (JvmtiExport::can_post_interpreter_events()) { | |
613 Label run_compiled_code; | |
614 // JVMTI events, such as single-stepping, are implemented partly by avoiding running | |
615 // compiled code in threads for which the event is enabled. Check here for | |
616 // interp_only_mode if these events CAN be enabled. | |
617 get_thread(temp); | |
618 // interp_only is an int, on little endian it is sufficient to test the byte only | |
619 // Is a cmpl faster (ce | |
620 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0); | |
621 jcc(Assembler::zero, run_compiled_code); | |
622 jmp(Address(method, methodOopDesc::interpreter_entry_offset())); | |
623 bind(run_compiled_code); | |
624 } | |
625 | |
626 jmp(Address(method, methodOopDesc::from_interpreted_offset())); | |
627 | |
628 } | |
629 | |
630 | |
631 // The following two routines provide a hook so that an implementation | |
632 // can schedule the dispatch in two parts. amd64 does not do this. | |
633 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { | |
634 // Nothing amd64 specific to be done here | |
635 } | |
636 | |
637 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { | |
638 dispatch_next(state, step); | |
639 } | |
640 | |
641 void InterpreterMacroAssembler::dispatch_base(TosState state, | |
642 address* table, | |
643 bool verifyoop) { | |
644 verify_FPU(1, state); | |
645 if (VerifyActivationFrameSize) { | |
646 Label L; | |
647 movq(rcx, rbp); | |
648 subq(rcx, rsp); | |
649 int min_frame_size = | |
650 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * | |
651 wordSize; | |
652 cmpq(rcx, min_frame_size); | |
653 jcc(Assembler::greaterEqual, L); | |
654 stop("broken stack frame"); | |
655 bind(L); | |
656 } | |
657 if (verifyoop) { | |
658 verify_oop(rax, state); | |
659 } | |
660 lea(rscratch1, ExternalAddress((address)table)); | |
661 jmp(Address(rscratch1, rbx, Address::times_8)); | |
662 } | |
663 | |
664 void InterpreterMacroAssembler::dispatch_only(TosState state) { | |
665 dispatch_base(state, Interpreter::dispatch_table(state)); | |
666 } | |
667 | |
668 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { | |
669 dispatch_base(state, Interpreter::normal_table(state)); | |
670 } | |
671 | |
672 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { | |
673 dispatch_base(state, Interpreter::normal_table(state), false); | |
674 } | |
675 | |
676 | |
677 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { | |
678 // load next bytecode (load before advancing r13 to prevent AGI) | |
679 load_unsigned_byte(rbx, Address(r13, step)); | |
680 // advance r13 | |
681 incrementq(r13, step); | |
682 dispatch_base(state, Interpreter::dispatch_table(state)); | |
683 } | |
684 | |
685 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { | |
686 // load current bytecode | |
687 load_unsigned_byte(rbx, Address(r13, 0)); | |
688 dispatch_base(state, table); | |
689 } | |
690 | |
691 // remove activation | |
692 // | |
693 // Unlock the receiver if this is a synchronized method. | |
694 // Unlock any Java monitors from syncronized blocks. | |
695 // Remove the activation from the stack. | |
696 // | |
697 // If there are locked Java monitors | |
698 // If throw_monitor_exception | |
699 // throws IllegalMonitorStateException | |
700 // Else if install_monitor_exception | |
701 // installs IllegalMonitorStateException | |
702 // Else | |
703 // no error processing | |
704 void InterpreterMacroAssembler::remove_activation( | |
705 TosState state, | |
706 Register ret_addr, | |
707 bool throw_monitor_exception, | |
708 bool install_monitor_exception, | |
709 bool notify_jvmdi) { | |
710 // Note: Registers rdx xmm0 may be in use for the | |
711 // result check if synchronized method | |
712 Label unlocked, unlock, no_unlock; | |
713 | |
714 // get the value of _do_not_unlock_if_synchronized into rdx | |
715 const Address do_not_unlock_if_synchronized(r15_thread, | |
716 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
717 movbool(rdx, do_not_unlock_if_synchronized); | |
718 movbool(do_not_unlock_if_synchronized, false); // reset the flag | |
719 | |
720 // get method access flags | |
721 movq(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); | |
722 movl(rcx, Address(rbx, methodOopDesc::access_flags_offset())); | |
723 testl(rcx, JVM_ACC_SYNCHRONIZED); | |
724 jcc(Assembler::zero, unlocked); | |
725 | |
726 // Don't unlock anything if the _do_not_unlock_if_synchronized flag | |
727 // is set. | |
728 testbool(rdx); | |
729 jcc(Assembler::notZero, no_unlock); | |
730 | |
731 // unlock monitor | |
732 push(state); // save result | |
733 | |
734 // BasicObjectLock will be first in list, since this is a | |
735 // synchronized method. However, need to check that the object has | |
736 // not been unlocked by an explicit monitorexit bytecode. | |
737 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * | |
738 wordSize - (int) sizeof(BasicObjectLock)); | |
739 // We use c_rarg1 so that if we go slow path it will be the correct | |
740 // register for unlock_object to pass to VM directly | |
741 leaq(c_rarg1, monitor); // address of first monitor | |
742 | |
743 movq(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); | |
744 testq(rax, rax); | |
745 jcc(Assembler::notZero, unlock); | |
746 | |
747 pop(state); | |
748 if (throw_monitor_exception) { | |
749 // Entry already unlocked, need to throw exception | |
750 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
751 InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
752 should_not_reach_here(); | |
753 } else { | |
754 // Monitor already unlocked during a stack unroll. If requested, | |
755 // install an illegal_monitor_state_exception. Continue with | |
756 // stack unrolling. | |
757 if (install_monitor_exception) { | |
758 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
759 InterpreterRuntime::new_illegal_monitor_state_exception)); | |
760 } | |
761 jmp(unlocked); | |
762 } | |
763 | |
764 bind(unlock); | |
765 unlock_object(c_rarg1); | |
766 pop(state); | |
767 | |
768 // Check that for block-structured locking (i.e., that all locked | |
769 // objects has been unlocked) | |
770 bind(unlocked); | |
771 | |
772 // rax: Might contain return value | |
773 | |
774 // Check that all monitors are unlocked | |
775 { | |
776 Label loop, exception, entry, restart; | |
777 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
778 const Address monitor_block_top( | |
779 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
780 const Address monitor_block_bot( | |
781 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
782 | |
783 bind(restart); | |
784 // We use c_rarg1 so that if we go slow path it will be the correct | |
785 // register for unlock_object to pass to VM directly | |
786 movq(c_rarg1, monitor_block_top); // points to current entry, starting | |
787 // with top-most entry | |
788 leaq(rbx, monitor_block_bot); // points to word before bottom of | |
789 // monitor block | |
790 jmp(entry); | |
791 | |
792 // Entry already locked, need to throw exception | |
793 bind(exception); | |
794 | |
795 if (throw_monitor_exception) { | |
796 // Throw exception | |
797 MacroAssembler::call_VM(noreg, | |
798 CAST_FROM_FN_PTR(address, InterpreterRuntime:: | |
799 throw_illegal_monitor_state_exception)); | |
800 should_not_reach_here(); | |
801 } else { | |
802 // Stack unrolling. Unlock object and install illegal_monitor_exception. | |
803 // Unlock does not block, so don't have to worry about the frame. | |
804 // We don't have to preserve c_rarg1 since we are going to throw an exception. | |
805 | |
806 push(state); | |
807 unlock_object(c_rarg1); | |
808 pop(state); | |
809 | |
810 if (install_monitor_exception) { | |
811 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
812 InterpreterRuntime:: | |
813 new_illegal_monitor_state_exception)); | |
814 } | |
815 | |
816 jmp(restart); | |
817 } | |
818 | |
819 bind(loop); | |
820 // check if current entry is used | |
821 cmpq(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), (int) NULL); | |
822 jcc(Assembler::notEqual, exception); | |
823 | |
824 addq(c_rarg1, entry_size); // otherwise advance to next entry | |
825 bind(entry); | |
826 cmpq(c_rarg1, rbx); // check if bottom reached | |
827 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry | |
828 } | |
829 | |
830 bind(no_unlock); | |
831 | |
832 // jvmti support | |
833 if (notify_jvmdi) { | |
834 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA | |
835 } else { | |
836 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA | |
837 } | |
838 | |
839 // remove activation | |
840 // get sender sp | |
841 movq(rbx, | |
842 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); | |
843 leave(); // remove frame anchor | |
844 popq(ret_addr); // get return address | |
845 movq(rsp, rbx); // set sp to sender sp | |
846 } | |
847 | |
848 // Lock object | |
849 // | |
850 // Args: | |
851 // c_rarg1: BasicObjectLock to be used for locking | |
852 // | |
853 // Kills: | |
854 // rax | |
855 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs) | |
856 // rscratch1, rscratch2 (scratch regs) | |
857 void InterpreterMacroAssembler::lock_object(Register lock_reg) { | |
858 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1"); | |
859 | |
860 if (UseHeavyMonitors) { | |
861 call_VM(noreg, | |
862 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
863 lock_reg); | |
864 } else { | |
865 Label done; | |
866 | |
867 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
868 const Register obj_reg = c_rarg3; // Will contain the oop | |
869 | |
870 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); | |
871 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); | |
872 const int mark_offset = lock_offset + | |
873 BasicLock::displaced_header_offset_in_bytes(); | |
874 | |
875 Label slow_case; | |
876 | |
877 // Load object pointer into obj_reg %c_rarg3 | |
878 movq(obj_reg, Address(lock_reg, obj_offset)); | |
879 | |
880 if (UseBiasedLocking) { | |
881 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case); | |
882 } | |
883 | |
884 // Load immediate 1 into swap_reg %rax | |
885 movl(swap_reg, 1); | |
886 | |
887 // Load (object->mark() | 1) into swap_reg %rax | |
888 orq(swap_reg, Address(obj_reg, 0)); | |
889 | |
890 // Save (object->mark() | 1) into BasicLock's displaced header | |
891 movq(Address(lock_reg, mark_offset), swap_reg); | |
892 | |
893 assert(lock_offset == 0, | |
894 "displached header must be first word in BasicObjectLock"); | |
895 | |
896 if (os::is_MP()) lock(); | |
897 cmpxchgq(lock_reg, Address(obj_reg, 0)); | |
898 if (PrintBiasedLockingStatistics) { | |
899 cond_inc32(Assembler::zero, | |
900 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
901 } | |
902 jcc(Assembler::zero, done); | |
903 | |
904 // Test if the oopMark is an obvious stack pointer, i.e., | |
905 // 1) (mark & 7) == 0, and | |
906 // 2) rsp <= mark < mark + os::pagesize() | |
907 // | |
908 // These 3 tests can be done by evaluating the following | |
909 // expression: ((mark - rsp) & (7 - os::vm_page_size())), | |
910 // assuming both stack pointer and pagesize have their | |
911 // least significant 3 bits clear. | |
912 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
913 subq(swap_reg, rsp); | |
914 andq(swap_reg, 7 - os::vm_page_size()); | |
915 | |
916 // Save the test result, for recursive case, the result is zero | |
917 movq(Address(lock_reg, mark_offset), swap_reg); | |
918 | |
919 if (PrintBiasedLockingStatistics) { | |
920 cond_inc32(Assembler::zero, | |
921 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
922 } | |
923 jcc(Assembler::zero, done); | |
924 | |
925 bind(slow_case); | |
926 | |
927 // Call the runtime routine for slow case | |
928 call_VM(noreg, | |
929 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
930 lock_reg); | |
931 | |
932 bind(done); | |
933 } | |
934 } | |
935 | |
936 | |
937 // Unlocks an object. Used in monitorexit bytecode and | |
938 // remove_activation. Throws an IllegalMonitorException if object is | |
939 // not locked by current thread. | |
940 // | |
941 // Args: | |
942 // c_rarg1: BasicObjectLock for lock | |
943 // | |
944 // Kills: | |
945 // rax | |
946 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) | |
947 // rscratch1, rscratch2 (scratch regs) | |
948 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { | |
949 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1"); | |
950 | |
951 if (UseHeavyMonitors) { | |
952 call_VM(noreg, | |
953 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
954 lock_reg); | |
955 } else { | |
956 Label done; | |
957 | |
958 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
959 const Register header_reg = c_rarg2; // Will contain the old oopMark | |
960 const Register obj_reg = c_rarg3; // Will contain the oop | |
961 | |
962 save_bcp(); // Save in case of exception | |
963 | |
964 // Convert from BasicObjectLock structure to object and BasicLock | |
965 // structure Store the BasicLock address into %rax | |
966 leaq(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); | |
967 | |
968 // Load oop into obj_reg(%c_rarg3) | |
969 movq(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); | |
970 | |
971 // Free entry | |
972 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD); | |
973 | |
974 if (UseBiasedLocking) { | |
975 biased_locking_exit(obj_reg, header_reg, done); | |
976 } | |
977 | |
978 // Load the old header from BasicLock structure | |
979 movq(header_reg, Address(swap_reg, | |
980 BasicLock::displaced_header_offset_in_bytes())); | |
981 | |
982 // Test for recursion | |
983 testq(header_reg, header_reg); | |
984 | |
985 // zero for recursive case | |
986 jcc(Assembler::zero, done); | |
987 | |
988 // Atomic swap back the old header | |
989 if (os::is_MP()) lock(); | |
990 cmpxchgq(header_reg, Address(obj_reg, 0)); | |
991 | |
992 // zero for recursive case | |
993 jcc(Assembler::zero, done); | |
994 | |
995 // Call the runtime routine for slow case. | |
996 movq(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), | |
997 obj_reg); // restore obj | |
998 call_VM(noreg, | |
999 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
1000 lock_reg); | |
1001 | |
1002 bind(done); | |
1003 | |
1004 restore_bcp(); | |
1005 } | |
1006 } | |
1007 | |
1008 | |
1009 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, | |
1010 Label& zero_continue) { | |
1011 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1012 movq(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); | |
1013 testq(mdp, mdp); | |
1014 jcc(Assembler::zero, zero_continue); | |
1015 } | |
1016 | |
1017 | |
1018 // Set the method data pointer for the current bcp. | |
1019 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { | |
1020 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1021 Label zero_continue; | |
1022 pushq(rax); | |
1023 pushq(rbx); | |
1024 | |
1025 get_method(rbx); | |
1026 // Test MDO to avoid the call if it is NULL. | |
1027 movq(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); | |
1028 testq(rax, rax); | |
1029 jcc(Assembler::zero, zero_continue); | |
1030 | |
1031 // rbx: method | |
1032 // r13: bcp | |
1033 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13); | |
1034 // rax: mdi | |
1035 | |
1036 movq(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); | |
1037 testq(rbx, rbx); | |
1038 jcc(Assembler::zero, zero_continue); | |
1039 addq(rbx, in_bytes(methodDataOopDesc::data_offset())); | |
1040 addq(rbx, rax); | |
1041 movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rbx); | |
1042 | |
1043 bind(zero_continue); | |
1044 popq(rbx); | |
1045 popq(rax); | |
1046 } | |
1047 | |
1048 void InterpreterMacroAssembler::verify_method_data_pointer() { | |
1049 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1050 #ifdef ASSERT | |
1051 Label verify_continue; | |
1052 pushq(rax); | |
1053 pushq(rbx); | |
1054 pushq(c_rarg3); | |
1055 pushq(c_rarg2); | |
1056 test_method_data_pointer(c_rarg3, verify_continue); // If mdp is zero, continue | |
1057 get_method(rbx); | |
1058 | |
1059 // If the mdp is valid, it will point to a DataLayout header which is | |
1060 // consistent with the bcp. The converse is highly probable also. | |
1061 load_unsigned_word(c_rarg2, | |
1062 Address(c_rarg3, in_bytes(DataLayout::bci_offset()))); | |
1063 addq(c_rarg2, Address(rbx, methodOopDesc::const_offset())); | |
1064 leaq(c_rarg2, Address(c_rarg2, constMethodOopDesc::codes_offset())); | |
1065 cmpq(c_rarg2, r13); | |
1066 jcc(Assembler::equal, verify_continue); | |
1067 // rbx: method | |
1068 // r13: bcp | |
1069 // c_rarg3: mdp | |
1070 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), | |
1071 rbx, r13, c_rarg3); | |
1072 bind(verify_continue); | |
1073 popq(c_rarg2); | |
1074 popq(c_rarg3); | |
1075 popq(rbx); | |
1076 popq(rax); | |
1077 #endif // ASSERT | |
1078 } | |
1079 | |
1080 | |
1081 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, | |
1082 int constant, | |
1083 Register value) { | |
1084 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1085 Address data(mdp_in, constant); | |
1086 movq(data, value); | |
1087 } | |
1088 | |
1089 | |
1090 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
1091 int constant, | |
1092 bool decrement) { | |
1093 // Counter address | |
1094 Address data(mdp_in, constant); | |
1095 | |
1096 increment_mdp_data_at(data, decrement); | |
1097 } | |
1098 | |
1099 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, | |
1100 bool decrement) { | |
1101 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1102 | |
1103 if (decrement) { | |
1104 // Decrement the register. Set condition codes. | |
1105 addq(data, -DataLayout::counter_increment); | |
1106 // If the decrement causes the counter to overflow, stay negative | |
1107 Label L; | |
1108 jcc(Assembler::negative, L); | |
1109 addq(data, DataLayout::counter_increment); | |
1110 bind(L); | |
1111 } else { | |
1112 assert(DataLayout::counter_increment == 1, | |
1113 "flow-free idiom only works with 1"); | |
1114 // Increment the register. Set carry flag. | |
1115 addq(data, DataLayout::counter_increment); | |
1116 // If the increment causes the counter to overflow, pull back by 1. | |
1117 sbbq(data, 0); | |
1118 } | |
1119 } | |
1120 | |
1121 | |
1122 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
1123 Register reg, | |
1124 int constant, | |
1125 bool decrement) { | |
1126 Address data(mdp_in, reg, Address::times_1, constant); | |
1127 | |
1128 increment_mdp_data_at(data, decrement); | |
1129 } | |
1130 | |
1131 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, | |
1132 int flag_byte_constant) { | |
1133 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1134 int header_offset = in_bytes(DataLayout::header_offset()); | |
1135 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); | |
1136 // Set the flag | |
1137 orl(Address(mdp_in, header_offset), header_bits); | |
1138 } | |
1139 | |
1140 | |
1141 | |
1142 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, | |
1143 int offset, | |
1144 Register value, | |
1145 Register test_value_out, | |
1146 Label& not_equal_continue) { | |
1147 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1148 if (test_value_out == noreg) { | |
1149 cmpq(value, Address(mdp_in, offset)); | |
1150 } else { | |
1151 // Put the test value into a register, so caller can use it: | |
1152 movq(test_value_out, Address(mdp_in, offset)); | |
1153 cmpq(test_value_out, value); | |
1154 } | |
1155 jcc(Assembler::notEqual, not_equal_continue); | |
1156 } | |
1157 | |
1158 | |
1159 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
1160 int offset_of_disp) { | |
1161 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1162 Address disp_address(mdp_in, offset_of_disp); | |
1163 addq(mdp_in, disp_address); | |
1164 movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
1165 } | |
1166 | |
1167 | |
1168 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
1169 Register reg, | |
1170 int offset_of_disp) { | |
1171 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1172 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); | |
1173 addq(mdp_in, disp_address); | |
1174 movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
1175 } | |
1176 | |
1177 | |
1178 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, | |
1179 int constant) { | |
1180 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1181 addq(mdp_in, constant); | |
1182 movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
1183 } | |
1184 | |
1185 | |
1186 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { | |
1187 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1188 pushq(return_bci); // save/restore across call_VM | |
1189 call_VM(noreg, | |
1190 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), | |
1191 return_bci); | |
1192 popq(return_bci); | |
1193 } | |
1194 | |
1195 | |
1196 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, | |
1197 Register bumped_count) { | |
1198 if (ProfileInterpreter) { | |
1199 Label profile_continue; | |
1200 | |
1201 // If no method data exists, go to profile_continue. | |
1202 // Otherwise, assign to mdp | |
1203 test_method_data_pointer(mdp, profile_continue); | |
1204 | |
1205 // We are taking a branch. Increment the taken count. | |
1206 // We inline increment_mdp_data_at to return bumped_count in a register | |
1207 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); | |
1208 Address data(mdp, in_bytes(JumpData::taken_offset())); | |
1209 movq(bumped_count, data); | |
1210 assert(DataLayout::counter_increment == 1, | |
1211 "flow-free idiom only works with 1"); | |
1212 addq(bumped_count, DataLayout::counter_increment); | |
1213 sbbq(bumped_count, 0); | |
1214 movq(data, bumped_count); // Store back out | |
1215 | |
1216 // The method data pointer needs to be updated to reflect the new target. | |
1217 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); | |
1218 bind(profile_continue); | |
1219 } | |
1220 } | |
1221 | |
1222 | |
1223 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { | |
1224 if (ProfileInterpreter) { | |
1225 Label profile_continue; | |
1226 | |
1227 // If no method data exists, go to profile_continue. | |
1228 test_method_data_pointer(mdp, profile_continue); | |
1229 | |
1230 // We are taking a branch. Increment the not taken count. | |
1231 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); | |
1232 | |
1233 // The method data pointer needs to be updated to correspond to | |
1234 // the next bytecode | |
1235 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); | |
1236 bind(profile_continue); | |
1237 } | |
1238 } | |
1239 | |
1240 | |
1241 void InterpreterMacroAssembler::profile_call(Register mdp) { | |
1242 if (ProfileInterpreter) { | |
1243 Label profile_continue; | |
1244 | |
1245 // If no method data exists, go to profile_continue. | |
1246 test_method_data_pointer(mdp, profile_continue); | |
1247 | |
1248 // We are making a call. Increment the count. | |
1249 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1250 | |
1251 // The method data pointer needs to be updated to reflect the new target. | |
1252 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); | |
1253 bind(profile_continue); | |
1254 } | |
1255 } | |
1256 | |
1257 | |
1258 void InterpreterMacroAssembler::profile_final_call(Register mdp) { | |
1259 if (ProfileInterpreter) { | |
1260 Label profile_continue; | |
1261 | |
1262 // If no method data exists, go to profile_continue. | |
1263 test_method_data_pointer(mdp, profile_continue); | |
1264 | |
1265 // We are making a call. Increment the count. | |
1266 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1267 | |
1268 // The method data pointer needs to be updated to reflect the new target. | |
1269 update_mdp_by_constant(mdp, | |
1270 in_bytes(VirtualCallData:: | |
1271 virtual_call_data_size())); | |
1272 bind(profile_continue); | |
1273 } | |
1274 } | |
1275 | |
1276 | |
1277 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, | |
1278 Register mdp, | |
1279 Register reg2) { | |
1280 if (ProfileInterpreter) { | |
1281 Label profile_continue; | |
1282 | |
1283 // If no method data exists, go to profile_continue. | |
1284 test_method_data_pointer(mdp, profile_continue); | |
1285 | |
1286 // We are making a call. Increment the count. | |
1287 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1288 | |
1289 // Record the receiver type. | |
1290 record_klass_in_profile(receiver, mdp, reg2); | |
1291 | |
1292 // The method data pointer needs to be updated to reflect the new target. | |
1293 update_mdp_by_constant(mdp, | |
1294 in_bytes(VirtualCallData:: | |
1295 virtual_call_data_size())); | |
1296 bind(profile_continue); | |
1297 } | |
1298 } | |
1299 | |
1300 // This routine creates a state machine for updating the multi-row | |
1301 // type profile at a virtual call site (or other type-sensitive bytecode). | |
1302 // The machine visits each row (of receiver/count) until the receiver type | |
1303 // is found, or until it runs out of rows. At the same time, it remembers | |
1304 // the location of the first empty row. (An empty row records null for its | |
1305 // receiver, and can be allocated for a newly-observed receiver type.) | |
1306 // Because there are two degrees of freedom in the state, a simple linear | |
1307 // search will not work; it must be a decision tree. Hence this helper | |
1308 // function is recursive, to generate the required tree structured code. | |
1309 // It's the interpreter, so we are trading off code space for speed. | |
1310 // See below for example code. | |
1311 void InterpreterMacroAssembler::record_klass_in_profile_helper( | |
1312 Register receiver, Register mdp, | |
1313 Register reg2, | |
1314 int start_row, Label& done) { | |
1315 int last_row = VirtualCallData::row_limit() - 1; | |
1316 assert(start_row <= last_row, "must be work left to do"); | |
1317 // Test this row for both the receiver and for null. | |
1318 // Take any of three different outcomes: | |
1319 // 1. found receiver => increment count and goto done | |
1320 // 2. found null => keep looking for case 1, maybe allocate this cell | |
1321 // 3. found something else => keep looking for cases 1 and 2 | |
1322 // Case 3 is handled by a recursive call. | |
1323 for (int row = start_row; row <= last_row; row++) { | |
1324 Label next_test; | |
1325 bool test_for_null_also = (row == start_row); | |
1326 | |
1327 // See if the receiver is receiver[n]. | |
1328 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); | |
1329 test_mdp_data_at(mdp, recvr_offset, receiver, | |
1330 (test_for_null_also ? reg2 : noreg), | |
1331 next_test); | |
1332 // (Reg2 now contains the receiver from the CallData.) | |
1333 | |
1334 // The receiver is receiver[n]. Increment count[n]. | |
1335 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); | |
1336 increment_mdp_data_at(mdp, count_offset); | |
1337 jmp(done); | |
1338 bind(next_test); | |
1339 | |
1340 if (test_for_null_also) { | |
1341 // Failed the equality check on receiver[n]... Test for null. | |
1342 testq(reg2, reg2); | |
1343 if (start_row == last_row) { | |
1344 // The only thing left to do is handle the null case. | |
1345 jcc(Assembler::notZero, done); | |
1346 break; | |
1347 } | |
1348 // Since null is rare, make it be the branch-taken case. | |
1349 Label found_null; | |
1350 jcc(Assembler::zero, found_null); | |
1351 | |
1352 // Put all the "Case 3" tests here. | |
1353 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done); | |
1354 | |
1355 // Found a null. Keep searching for a matching receiver, | |
1356 // but remember that this is an empty (unused) slot. | |
1357 bind(found_null); | |
1358 } | |
1359 } | |
1360 | |
1361 // In the fall-through case, we found no matching receiver, but we | |
1362 // observed the receiver[start_row] is NULL. | |
1363 | |
1364 // Fill in the receiver field and increment the count. | |
1365 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); | |
1366 set_mdp_data_at(mdp, recvr_offset, receiver); | |
1367 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); | |
1368 movl(reg2, DataLayout::counter_increment); | |
1369 set_mdp_data_at(mdp, count_offset, reg2); | |
1370 jmp(done); | |
1371 } | |
1372 | |
1373 // Example state machine code for three profile rows: | |
1374 // // main copy of decision tree, rooted at row[1] | |
1375 // if (row[0].rec == rec) { row[0].incr(); goto done; } | |
1376 // if (row[0].rec != NULL) { | |
1377 // // inner copy of decision tree, rooted at row[1] | |
1378 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1379 // if (row[1].rec != NULL) { | |
1380 // // degenerate decision tree, rooted at row[2] | |
1381 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1382 // if (row[2].rec != NULL) { goto done; } // overflow | |
1383 // row[2].init(rec); goto done; | |
1384 // } else { | |
1385 // // remember row[1] is empty | |
1386 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1387 // row[1].init(rec); goto done; | |
1388 // } | |
1389 // } else { | |
1390 // // remember row[0] is empty | |
1391 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1392 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1393 // row[0].init(rec); goto done; | |
1394 // } | |
1395 | |
1396 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, | |
1397 Register mdp, | |
1398 Register reg2) { | |
1399 assert(ProfileInterpreter, "must be profiling"); | |
1400 Label done; | |
1401 | |
1402 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done); | |
1403 | |
1404 bind (done); | |
1405 } | |
1406 | |
1407 void InterpreterMacroAssembler::profile_ret(Register return_bci, | |
1408 Register mdp) { | |
1409 if (ProfileInterpreter) { | |
1410 Label profile_continue; | |
1411 uint row; | |
1412 | |
1413 // If no method data exists, go to profile_continue. | |
1414 test_method_data_pointer(mdp, profile_continue); | |
1415 | |
1416 // Update the total ret count. | |
1417 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1418 | |
1419 for (row = 0; row < RetData::row_limit(); row++) { | |
1420 Label next_test; | |
1421 | |
1422 // See if return_bci is equal to bci[n]: | |
1423 test_mdp_data_at(mdp, | |
1424 in_bytes(RetData::bci_offset(row)), | |
1425 return_bci, noreg, | |
1426 next_test); | |
1427 | |
1428 // return_bci is equal to bci[n]. Increment the count. | |
1429 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); | |
1430 | |
1431 // The method data pointer needs to be updated to reflect the new target. | |
1432 update_mdp_by_offset(mdp, | |
1433 in_bytes(RetData::bci_displacement_offset(row))); | |
1434 jmp(profile_continue); | |
1435 bind(next_test); | |
1436 } | |
1437 | |
1438 update_mdp_for_ret(return_bci); | |
1439 | |
1440 bind(profile_continue); | |
1441 } | |
1442 } | |
1443 | |
1444 | |
1445 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { | |
1446 if (ProfileInterpreter) { | |
1447 Label profile_continue; | |
1448 | |
1449 // If no method data exists, go to profile_continue. | |
1450 test_method_data_pointer(mdp, profile_continue); | |
1451 | |
1452 // The method data pointer needs to be updated. | |
1453 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1454 if (TypeProfileCasts) { | |
1455 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1456 } | |
1457 update_mdp_by_constant(mdp, mdp_delta); | |
1458 | |
1459 bind(profile_continue); | |
1460 } | |
1461 } | |
1462 | |
1463 | |
1464 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { | |
1465 if (ProfileInterpreter && TypeProfileCasts) { | |
1466 Label profile_continue; | |
1467 | |
1468 // If no method data exists, go to profile_continue. | |
1469 test_method_data_pointer(mdp, profile_continue); | |
1470 | |
1471 int count_offset = in_bytes(CounterData::count_offset()); | |
1472 // Back up the address, since we have already bumped the mdp. | |
1473 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); | |
1474 | |
1475 // *Decrement* the counter. We expect to see zero or small negatives. | |
1476 increment_mdp_data_at(mdp, count_offset, true); | |
1477 | |
1478 bind (profile_continue); | |
1479 } | |
1480 } | |
1481 | |
1482 | |
1483 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { | |
1484 if (ProfileInterpreter) { | |
1485 Label profile_continue; | |
1486 | |
1487 // If no method data exists, go to profile_continue. | |
1488 test_method_data_pointer(mdp, profile_continue); | |
1489 | |
1490 // The method data pointer needs to be updated. | |
1491 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1492 if (TypeProfileCasts) { | |
1493 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1494 | |
1495 // Record the object type. | |
1496 record_klass_in_profile(klass, mdp, reg2); | |
1497 } | |
1498 update_mdp_by_constant(mdp, mdp_delta); | |
1499 | |
1500 bind(profile_continue); | |
1501 } | |
1502 } | |
1503 | |
1504 | |
1505 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { | |
1506 if (ProfileInterpreter) { | |
1507 Label profile_continue; | |
1508 | |
1509 // If no method data exists, go to profile_continue. | |
1510 test_method_data_pointer(mdp, profile_continue); | |
1511 | |
1512 // Update the default case count | |
1513 increment_mdp_data_at(mdp, | |
1514 in_bytes(MultiBranchData::default_count_offset())); | |
1515 | |
1516 // The method data pointer needs to be updated. | |
1517 update_mdp_by_offset(mdp, | |
1518 in_bytes(MultiBranchData:: | |
1519 default_displacement_offset())); | |
1520 | |
1521 bind(profile_continue); | |
1522 } | |
1523 } | |
1524 | |
1525 | |
1526 void InterpreterMacroAssembler::profile_switch_case(Register index, | |
1527 Register mdp, | |
1528 Register reg2) { | |
1529 if (ProfileInterpreter) { | |
1530 Label profile_continue; | |
1531 | |
1532 // If no method data exists, go to profile_continue. | |
1533 test_method_data_pointer(mdp, profile_continue); | |
1534 | |
1535 // Build the base (index * per_case_size_in_bytes()) + | |
1536 // case_array_offset_in_bytes() | |
1537 movl(reg2, in_bytes(MultiBranchData::per_case_size())); | |
1538 imulq(index, reg2); // XXX l ? | |
1539 addq(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? | |
1540 | |
1541 // Update the case count | |
1542 increment_mdp_data_at(mdp, | |
1543 index, | |
1544 in_bytes(MultiBranchData::relative_count_offset())); | |
1545 | |
1546 // The method data pointer needs to be updated. | |
1547 update_mdp_by_offset(mdp, | |
1548 index, | |
1549 in_bytes(MultiBranchData:: | |
1550 relative_displacement_offset())); | |
1551 | |
1552 bind(profile_continue); | |
1553 } | |
1554 } | |
1555 | |
1556 | |
1557 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { | |
1558 if (state == atos) { | |
1559 MacroAssembler::verify_oop(reg); | |
1560 } | |
1561 } | |
1562 | |
1563 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { | |
1564 } | |
1565 | |
1566 | |
1567 void InterpreterMacroAssembler::notify_method_entry() { | |
1568 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1569 // track stack depth. If it is possible to enter interp_only_mode we add | |
1570 // the code to check if the event should be sent. | |
1571 if (JvmtiExport::can_post_interpreter_events()) { | |
1572 Label L; | |
1573 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); | |
1574 testl(rdx, rdx); | |
1575 jcc(Assembler::zero, L); | |
1576 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
1577 InterpreterRuntime::post_method_entry)); | |
1578 bind(L); | |
1579 } | |
1580 | |
1581 { | |
1582 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
1583 get_method(c_rarg1); | |
1584 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1585 r15_thread, c_rarg1); | |
1586 } | |
1587 } | |
1588 | |
1589 | |
1590 void InterpreterMacroAssembler::notify_method_exit( | |
1591 TosState state, NotifyMethodExitMode mode) { | |
1592 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1593 // track stack depth. If it is possible to enter interp_only_mode we add | |
1594 // the code to check if the event should be sent. | |
1595 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { | |
1596 Label L; | |
1597 // Note: frame::interpreter_frame_result has a dependency on how the | |
1598 // method result is saved across the call to post_method_exit. If this | |
1599 // is changed then the interpreter_frame_result implementation will | |
1600 // need to be updated too. | |
1601 push(state); | |
1602 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); | |
1603 testl(rdx, rdx); | |
1604 jcc(Assembler::zero, L); | |
1605 call_VM(noreg, | |
1606 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); | |
1607 bind(L); | |
1608 pop(state); | |
1609 } | |
1610 | |
1611 { | |
1612 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
1613 push(state); | |
1614 get_method(c_rarg1); | |
1615 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1616 r15_thread, c_rarg1); | |
1617 pop(state); | |
1618 } | |
1619 } |