Mercurial > hg > truffle
annotate src/cpu/x86/vm/interp_masm_x86_64.cpp @ 177:2a8ec427fbe1
6706604: Copyright headers need to be changed to GPL.
Summary: Update the copyrights
Reviewed-by: ohair
author | kamg |
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date | Thu, 29 May 2008 14:06:30 -0400 |
parents | ba764ed4b6f2 |
children | 6d172e3548cb 37f87013dfd8 |
rev | line source |
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0 | 1 /* |
2 * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact 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 | |
236 Label not_subtype, loop; | |
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 | |
113
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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 encode_heap_oop(rax); |
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276 repne_scanl(); |
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277 // Not equal? |
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278 jcc(Assembler::notEqual, not_subtype); |
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279 // decode heap oop here for movq |
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280 decode_heap_oop(rax); |
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281 } else { |
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282 repne_scanq(); |
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283 jcc(Assembler::notEqual, not_subtype); |
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284 } |
0 | 285 // Must be equal but missed in cache. Update cache. |
286 movq(Address(Rsub_klass, sizeof(oopDesc) + | |
287 Klass::secondary_super_cache_offset_in_bytes()), rax); | |
288 jmp(ok_is_subtype); | |
289 | |
290 bind(not_subtype); | |
113
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291 // decode heap oop here for miss |
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292 if (UseCompressedOops) decode_heap_oop(rax); |
0 | 293 profile_typecheck_failed(rcx); // blows rcx |
294 } | |
295 | |
296 | |
297 // Java Expression Stack | |
298 | |
299 #ifdef ASSERT | |
300 // Verifies that the stack tag matches. Must be called before the stack | |
301 // value is popped off the stack. | |
302 void InterpreterMacroAssembler::verify_stack_tag(frame::Tag t) { | |
303 if (TaggedStackInterpreter) { | |
304 frame::Tag tag = t; | |
305 if (t == frame::TagCategory2) { | |
306 tag = frame::TagValue; | |
307 Label hokay; | |
308 cmpq(Address(rsp, 3*wordSize), (int)tag); | |
309 jcc(Assembler::equal, hokay); | |
310 stop("Java Expression stack tag high value is bad"); | |
311 bind(hokay); | |
312 } | |
313 Label okay; | |
314 cmpq(Address(rsp, wordSize), (int)tag); | |
315 jcc(Assembler::equal, okay); | |
316 // Also compare if the stack value is zero, then the tag might | |
317 // not have been set coming from deopt. | |
318 cmpq(Address(rsp, 0), 0); | |
319 jcc(Assembler::equal, okay); | |
320 stop("Java Expression stack tag value is bad"); | |
321 bind(okay); | |
322 } | |
323 } | |
324 #endif // ASSERT | |
325 | |
326 void InterpreterMacroAssembler::pop_ptr(Register r) { | |
327 debug_only(verify_stack_tag(frame::TagReference)); | |
328 popq(r); | |
329 if (TaggedStackInterpreter) addq(rsp, 1 * wordSize); | |
330 } | |
331 | |
332 void InterpreterMacroAssembler::pop_ptr(Register r, Register tag) { | |
333 popq(r); | |
334 if (TaggedStackInterpreter) popq(tag); | |
335 } | |
336 | |
337 void InterpreterMacroAssembler::pop_i(Register r) { | |
338 // XXX can't use popq currently, upper half non clean | |
339 debug_only(verify_stack_tag(frame::TagValue)); | |
340 movl(r, Address(rsp, 0)); | |
341 addq(rsp, wordSize); | |
342 if (TaggedStackInterpreter) addq(rsp, 1 * wordSize); | |
343 } | |
344 | |
345 void InterpreterMacroAssembler::pop_l(Register r) { | |
346 debug_only(verify_stack_tag(frame::TagCategory2)); | |
347 movq(r, Address(rsp, 0)); | |
348 addq(rsp, 2 * Interpreter::stackElementSize()); | |
349 } | |
350 | |
351 void InterpreterMacroAssembler::pop_f(XMMRegister r) { | |
352 debug_only(verify_stack_tag(frame::TagValue)); | |
353 movflt(r, Address(rsp, 0)); | |
354 addq(rsp, wordSize); | |
355 if (TaggedStackInterpreter) addq(rsp, 1 * wordSize); | |
356 } | |
357 | |
358 void InterpreterMacroAssembler::pop_d(XMMRegister r) { | |
359 debug_only(verify_stack_tag(frame::TagCategory2)); | |
360 movdbl(r, Address(rsp, 0)); | |
361 addq(rsp, 2 * Interpreter::stackElementSize()); | |
362 } | |
363 | |
364 void InterpreterMacroAssembler::push_ptr(Register r) { | |
365 if (TaggedStackInterpreter) pushq(frame::TagReference); | |
366 pushq(r); | |
367 } | |
368 | |
369 void InterpreterMacroAssembler::push_ptr(Register r, Register tag) { | |
370 if (TaggedStackInterpreter) pushq(tag); | |
371 pushq(r); | |
372 } | |
373 | |
374 void InterpreterMacroAssembler::push_i(Register r) { | |
375 if (TaggedStackInterpreter) pushq(frame::TagValue); | |
376 pushq(r); | |
377 } | |
378 | |
379 void InterpreterMacroAssembler::push_l(Register r) { | |
380 if (TaggedStackInterpreter) { | |
381 pushq(frame::TagValue); | |
382 subq(rsp, 1 * wordSize); | |
383 pushq(frame::TagValue); | |
384 subq(rsp, 1 * wordSize); | |
385 } else { | |
386 subq(rsp, 2 * wordSize); | |
387 } | |
388 movq(Address(rsp, 0), r); | |
389 } | |
390 | |
391 void InterpreterMacroAssembler::push_f(XMMRegister r) { | |
392 if (TaggedStackInterpreter) pushq(frame::TagValue); | |
393 subq(rsp, wordSize); | |
394 movflt(Address(rsp, 0), r); | |
395 } | |
396 | |
397 void InterpreterMacroAssembler::push_d(XMMRegister r) { | |
398 if (TaggedStackInterpreter) { | |
399 pushq(frame::TagValue); | |
400 subq(rsp, 1 * wordSize); | |
401 pushq(frame::TagValue); | |
402 subq(rsp, 1 * wordSize); | |
403 } else { | |
404 subq(rsp, 2 * wordSize); | |
405 } | |
406 movdbl(Address(rsp, 0), r); | |
407 } | |
408 | |
409 void InterpreterMacroAssembler::pop(TosState state) { | |
410 switch (state) { | |
411 case atos: pop_ptr(); break; | |
412 case btos: | |
413 case ctos: | |
414 case stos: | |
415 case itos: pop_i(); break; | |
416 case ltos: pop_l(); break; | |
417 case ftos: pop_f(); break; | |
418 case dtos: pop_d(); break; | |
419 case vtos: /* nothing to do */ break; | |
420 default: ShouldNotReachHere(); | |
421 } | |
422 verify_oop(rax, state); | |
423 } | |
424 | |
425 void InterpreterMacroAssembler::push(TosState state) { | |
426 verify_oop(rax, state); | |
427 switch (state) { | |
428 case atos: push_ptr(); break; | |
429 case btos: | |
430 case ctos: | |
431 case stos: | |
432 case itos: push_i(); break; | |
433 case ltos: push_l(); break; | |
434 case ftos: push_f(); break; | |
435 case dtos: push_d(); break; | |
436 case vtos: /* nothing to do */ break; | |
437 default : ShouldNotReachHere(); | |
438 } | |
439 } | |
440 | |
441 | |
442 // Tagged stack helpers for swap and dup | |
443 void InterpreterMacroAssembler::load_ptr_and_tag(int n, Register val, | |
444 Register tag) { | |
445 movq(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); | |
446 if (TaggedStackInterpreter) { | |
447 movq(tag, Address(rsp, Interpreter::expr_tag_offset_in_bytes(n))); | |
448 } | |
449 } | |
450 | |
451 void InterpreterMacroAssembler::store_ptr_and_tag(int n, Register val, | |
452 Register tag) { | |
453 movq(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); | |
454 if (TaggedStackInterpreter) { | |
455 movq(Address(rsp, Interpreter::expr_tag_offset_in_bytes(n)), tag); | |
456 } | |
457 } | |
458 | |
459 | |
460 // Tagged local support | |
461 void InterpreterMacroAssembler::tag_local(frame::Tag tag, int n) { | |
462 if (TaggedStackInterpreter) { | |
463 if (tag == frame::TagCategory2) { | |
464 mov64(Address(r14, Interpreter::local_tag_offset_in_bytes(n+1)), | |
465 (intptr_t)frame::TagValue); | |
466 mov64(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), | |
467 (intptr_t)frame::TagValue); | |
468 } else { | |
469 mov64(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), (intptr_t)tag); | |
470 } | |
471 } | |
472 } | |
473 | |
474 void InterpreterMacroAssembler::tag_local(frame::Tag tag, Register idx) { | |
475 if (TaggedStackInterpreter) { | |
476 if (tag == frame::TagCategory2) { | |
477 mov64(Address(r14, idx, Address::times_8, | |
478 Interpreter::local_tag_offset_in_bytes(1)), (intptr_t)frame::TagValue); | |
479 mov64(Address(r14, idx, Address::times_8, | |
480 Interpreter::local_tag_offset_in_bytes(0)), (intptr_t)frame::TagValue); | |
481 } else { | |
482 mov64(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), | |
483 (intptr_t)tag); | |
484 } | |
485 } | |
486 } | |
487 | |
488 void InterpreterMacroAssembler::tag_local(Register tag, Register idx) { | |
489 if (TaggedStackInterpreter) { | |
490 // can only be TagValue or TagReference | |
491 movq(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), tag); | |
492 } | |
493 } | |
494 | |
495 | |
496 void InterpreterMacroAssembler::tag_local(Register tag, int n) { | |
497 if (TaggedStackInterpreter) { | |
498 // can only be TagValue or TagReference | |
499 movq(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), tag); | |
500 } | |
501 } | |
502 | |
503 #ifdef ASSERT | |
504 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, int n) { | |
505 if (TaggedStackInterpreter) { | |
506 frame::Tag t = tag; | |
507 if (tag == frame::TagCategory2) { | |
508 Label nbl; | |
509 t = frame::TagValue; // change to what is stored in locals | |
510 cmpq(Address(r14, Interpreter::local_tag_offset_in_bytes(n+1)), (int)t); | |
511 jcc(Assembler::equal, nbl); | |
512 stop("Local tag is bad for long/double"); | |
513 bind(nbl); | |
514 } | |
515 Label notBad; | |
516 cmpq(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), (int)t); | |
517 jcc(Assembler::equal, notBad); | |
518 // Also compare if the local value is zero, then the tag might | |
519 // not have been set coming from deopt. | |
520 cmpq(Address(r14, Interpreter::local_offset_in_bytes(n)), 0); | |
521 jcc(Assembler::equal, notBad); | |
522 stop("Local tag is bad"); | |
523 bind(notBad); | |
524 } | |
525 } | |
526 | |
527 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, Register idx) { | |
528 if (TaggedStackInterpreter) { | |
529 frame::Tag t = tag; | |
530 if (tag == frame::TagCategory2) { | |
531 Label nbl; | |
532 t = frame::TagValue; // change to what is stored in locals | |
533 cmpq(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(1)), (int)t); | |
534 jcc(Assembler::equal, nbl); | |
535 stop("Local tag is bad for long/double"); | |
536 bind(nbl); | |
537 } | |
538 Label notBad; | |
539 cmpq(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), (int)t); | |
540 jcc(Assembler::equal, notBad); | |
541 // Also compare if the local value is zero, then the tag might | |
542 // not have been set coming from deopt. | |
543 cmpq(Address(r14, idx, Address::times_8, Interpreter::local_offset_in_bytes(0)), 0); | |
544 jcc(Assembler::equal, notBad); | |
545 stop("Local tag is bad"); | |
546 bind(notBad); | |
547 } | |
548 } | |
549 #endif // ASSERT | |
550 | |
551 | |
552 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point) { | |
553 MacroAssembler::call_VM_leaf_base(entry_point, 0); | |
554 } | |
555 | |
556 | |
557 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, | |
558 Register arg_1) { | |
559 if (c_rarg0 != arg_1) { | |
560 movq(c_rarg0, arg_1); | |
561 } | |
562 MacroAssembler::call_VM_leaf_base(entry_point, 1); | |
563 } | |
564 | |
565 | |
566 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, | |
567 Register arg_1, | |
568 Register arg_2) { | |
569 assert(c_rarg0 != arg_2, "smashed argument"); | |
570 assert(c_rarg1 != arg_1, "smashed argument"); | |
571 if (c_rarg0 != arg_1) { | |
572 movq(c_rarg0, arg_1); | |
573 } | |
574 if (c_rarg1 != arg_2) { | |
575 movq(c_rarg1, arg_2); | |
576 } | |
577 MacroAssembler::call_VM_leaf_base(entry_point, 2); | |
578 } | |
579 | |
580 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, | |
581 Register arg_1, | |
582 Register arg_2, | |
583 Register arg_3) { | |
584 assert(c_rarg0 != arg_2, "smashed argument"); | |
585 assert(c_rarg0 != arg_3, "smashed argument"); | |
586 assert(c_rarg1 != arg_1, "smashed argument"); | |
587 assert(c_rarg1 != arg_3, "smashed argument"); | |
588 assert(c_rarg2 != arg_1, "smashed argument"); | |
589 assert(c_rarg2 != arg_2, "smashed argument"); | |
590 if (c_rarg0 != arg_1) { | |
591 movq(c_rarg0, arg_1); | |
592 } | |
593 if (c_rarg1 != arg_2) { | |
594 movq(c_rarg1, arg_2); | |
595 } | |
596 if (c_rarg2 != arg_3) { | |
597 movq(c_rarg2, arg_3); | |
598 } | |
599 MacroAssembler::call_VM_leaf_base(entry_point, 3); | |
600 } | |
601 | |
602 // Jump to from_interpreted entry of a call unless single stepping is possible | |
603 // in this thread in which case we must call the i2i entry | |
604 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { | |
605 // set sender sp | |
606 leaq(r13, Address(rsp, wordSize)); | |
607 // record last_sp | |
608 movq(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), r13); | |
609 | |
610 if (JvmtiExport::can_post_interpreter_events()) { | |
611 Label run_compiled_code; | |
612 // JVMTI events, such as single-stepping, are implemented partly by avoiding running | |
613 // compiled code in threads for which the event is enabled. Check here for | |
614 // interp_only_mode if these events CAN be enabled. | |
615 get_thread(temp); | |
616 // interp_only is an int, on little endian it is sufficient to test the byte only | |
617 // Is a cmpl faster (ce | |
618 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0); | |
619 jcc(Assembler::zero, run_compiled_code); | |
620 jmp(Address(method, methodOopDesc::interpreter_entry_offset())); | |
621 bind(run_compiled_code); | |
622 } | |
623 | |
624 jmp(Address(method, methodOopDesc::from_interpreted_offset())); | |
625 | |
626 } | |
627 | |
628 | |
629 // The following two routines provide a hook so that an implementation | |
630 // can schedule the dispatch in two parts. amd64 does not do this. | |
631 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { | |
632 // Nothing amd64 specific to be done here | |
633 } | |
634 | |
635 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { | |
636 dispatch_next(state, step); | |
637 } | |
638 | |
639 void InterpreterMacroAssembler::dispatch_base(TosState state, | |
640 address* table, | |
641 bool verifyoop) { | |
642 verify_FPU(1, state); | |
643 if (VerifyActivationFrameSize) { | |
644 Label L; | |
645 movq(rcx, rbp); | |
646 subq(rcx, rsp); | |
647 int min_frame_size = | |
648 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * | |
649 wordSize; | |
650 cmpq(rcx, min_frame_size); | |
651 jcc(Assembler::greaterEqual, L); | |
652 stop("broken stack frame"); | |
653 bind(L); | |
654 } | |
655 if (verifyoop) { | |
656 verify_oop(rax, state); | |
657 } | |
658 lea(rscratch1, ExternalAddress((address)table)); | |
659 jmp(Address(rscratch1, rbx, Address::times_8)); | |
660 } | |
661 | |
662 void InterpreterMacroAssembler::dispatch_only(TosState state) { | |
663 dispatch_base(state, Interpreter::dispatch_table(state)); | |
664 } | |
665 | |
666 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { | |
667 dispatch_base(state, Interpreter::normal_table(state)); | |
668 } | |
669 | |
670 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { | |
671 dispatch_base(state, Interpreter::normal_table(state), false); | |
672 } | |
673 | |
674 | |
675 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { | |
676 // load next bytecode (load before advancing r13 to prevent AGI) | |
677 load_unsigned_byte(rbx, Address(r13, step)); | |
678 // advance r13 | |
679 incrementq(r13, step); | |
680 dispatch_base(state, Interpreter::dispatch_table(state)); | |
681 } | |
682 | |
683 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { | |
684 // load current bytecode | |
685 load_unsigned_byte(rbx, Address(r13, 0)); | |
686 dispatch_base(state, table); | |
687 } | |
688 | |
689 // remove activation | |
690 // | |
691 // Unlock the receiver if this is a synchronized method. | |
692 // Unlock any Java monitors from syncronized blocks. | |
693 // Remove the activation from the stack. | |
694 // | |
695 // If there are locked Java monitors | |
696 // If throw_monitor_exception | |
697 // throws IllegalMonitorStateException | |
698 // Else if install_monitor_exception | |
699 // installs IllegalMonitorStateException | |
700 // Else | |
701 // no error processing | |
702 void InterpreterMacroAssembler::remove_activation( | |
703 TosState state, | |
704 Register ret_addr, | |
705 bool throw_monitor_exception, | |
706 bool install_monitor_exception, | |
707 bool notify_jvmdi) { | |
708 // Note: Registers rdx xmm0 may be in use for the | |
709 // result check if synchronized method | |
710 Label unlocked, unlock, no_unlock; | |
711 | |
712 // get the value of _do_not_unlock_if_synchronized into rdx | |
713 const Address do_not_unlock_if_synchronized(r15_thread, | |
714 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
715 movbool(rdx, do_not_unlock_if_synchronized); | |
716 movbool(do_not_unlock_if_synchronized, false); // reset the flag | |
717 | |
718 // get method access flags | |
719 movq(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); | |
720 movl(rcx, Address(rbx, methodOopDesc::access_flags_offset())); | |
721 testl(rcx, JVM_ACC_SYNCHRONIZED); | |
722 jcc(Assembler::zero, unlocked); | |
723 | |
724 // Don't unlock anything if the _do_not_unlock_if_synchronized flag | |
725 // is set. | |
726 testbool(rdx); | |
727 jcc(Assembler::notZero, no_unlock); | |
728 | |
729 // unlock monitor | |
730 push(state); // save result | |
731 | |
732 // BasicObjectLock will be first in list, since this is a | |
733 // synchronized method. However, need to check that the object has | |
734 // not been unlocked by an explicit monitorexit bytecode. | |
735 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * | |
736 wordSize - (int) sizeof(BasicObjectLock)); | |
737 // We use c_rarg1 so that if we go slow path it will be the correct | |
738 // register for unlock_object to pass to VM directly | |
739 leaq(c_rarg1, monitor); // address of first monitor | |
740 | |
741 movq(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); | |
742 testq(rax, rax); | |
743 jcc(Assembler::notZero, unlock); | |
744 | |
745 pop(state); | |
746 if (throw_monitor_exception) { | |
747 // Entry already unlocked, need to throw exception | |
748 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
749 InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
750 should_not_reach_here(); | |
751 } else { | |
752 // Monitor already unlocked during a stack unroll. If requested, | |
753 // install an illegal_monitor_state_exception. Continue with | |
754 // stack unrolling. | |
755 if (install_monitor_exception) { | |
756 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
757 InterpreterRuntime::new_illegal_monitor_state_exception)); | |
758 } | |
759 jmp(unlocked); | |
760 } | |
761 | |
762 bind(unlock); | |
763 unlock_object(c_rarg1); | |
764 pop(state); | |
765 | |
766 // Check that for block-structured locking (i.e., that all locked | |
767 // objects has been unlocked) | |
768 bind(unlocked); | |
769 | |
770 // rax: Might contain return value | |
771 | |
772 // Check that all monitors are unlocked | |
773 { | |
774 Label loop, exception, entry, restart; | |
775 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
776 const Address monitor_block_top( | |
777 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
778 const Address monitor_block_bot( | |
779 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
780 | |
781 bind(restart); | |
782 // We use c_rarg1 so that if we go slow path it will be the correct | |
783 // register for unlock_object to pass to VM directly | |
784 movq(c_rarg1, monitor_block_top); // points to current entry, starting | |
785 // with top-most entry | |
786 leaq(rbx, monitor_block_bot); // points to word before bottom of | |
787 // monitor block | |
788 jmp(entry); | |
789 | |
790 // Entry already locked, need to throw exception | |
791 bind(exception); | |
792 | |
793 if (throw_monitor_exception) { | |
794 // Throw exception | |
795 MacroAssembler::call_VM(noreg, | |
796 CAST_FROM_FN_PTR(address, InterpreterRuntime:: | |
797 throw_illegal_monitor_state_exception)); | |
798 should_not_reach_here(); | |
799 } else { | |
800 // Stack unrolling. Unlock object and install illegal_monitor_exception. | |
801 // Unlock does not block, so don't have to worry about the frame. | |
802 // We don't have to preserve c_rarg1 since we are going to throw an exception. | |
803 | |
804 push(state); | |
805 unlock_object(c_rarg1); | |
806 pop(state); | |
807 | |
808 if (install_monitor_exception) { | |
809 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
810 InterpreterRuntime:: | |
811 new_illegal_monitor_state_exception)); | |
812 } | |
813 | |
814 jmp(restart); | |
815 } | |
816 | |
817 bind(loop); | |
818 // check if current entry is used | |
819 cmpq(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), (int) NULL); | |
820 jcc(Assembler::notEqual, exception); | |
821 | |
822 addq(c_rarg1, entry_size); // otherwise advance to next entry | |
823 bind(entry); | |
824 cmpq(c_rarg1, rbx); // check if bottom reached | |
825 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry | |
826 } | |
827 | |
828 bind(no_unlock); | |
829 | |
830 // jvmti support | |
831 if (notify_jvmdi) { | |
832 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA | |
833 } else { | |
834 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA | |
835 } | |
836 | |
837 // remove activation | |
838 // get sender sp | |
839 movq(rbx, | |
840 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); | |
841 leave(); // remove frame anchor | |
842 popq(ret_addr); // get return address | |
843 movq(rsp, rbx); // set sp to sender sp | |
844 } | |
845 | |
846 // Lock object | |
847 // | |
848 // Args: | |
849 // c_rarg1: BasicObjectLock to be used for locking | |
850 // | |
851 // Kills: | |
852 // rax | |
853 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs) | |
854 // rscratch1, rscratch2 (scratch regs) | |
855 void InterpreterMacroAssembler::lock_object(Register lock_reg) { | |
856 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1"); | |
857 | |
858 if (UseHeavyMonitors) { | |
859 call_VM(noreg, | |
860 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
861 lock_reg); | |
862 } else { | |
863 Label done; | |
864 | |
865 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
866 const Register obj_reg = c_rarg3; // Will contain the oop | |
867 | |
868 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); | |
869 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); | |
870 const int mark_offset = lock_offset + | |
871 BasicLock::displaced_header_offset_in_bytes(); | |
872 | |
873 Label slow_case; | |
874 | |
875 // Load object pointer into obj_reg %c_rarg3 | |
876 movq(obj_reg, Address(lock_reg, obj_offset)); | |
877 | |
878 if (UseBiasedLocking) { | |
879 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case); | |
880 } | |
881 | |
882 // Load immediate 1 into swap_reg %rax | |
883 movl(swap_reg, 1); | |
884 | |
885 // Load (object->mark() | 1) into swap_reg %rax | |
886 orq(swap_reg, Address(obj_reg, 0)); | |
887 | |
888 // Save (object->mark() | 1) into BasicLock's displaced header | |
889 movq(Address(lock_reg, mark_offset), swap_reg); | |
890 | |
891 assert(lock_offset == 0, | |
892 "displached header must be first word in BasicObjectLock"); | |
893 | |
894 if (os::is_MP()) lock(); | |
895 cmpxchgq(lock_reg, Address(obj_reg, 0)); | |
896 if (PrintBiasedLockingStatistics) { | |
897 cond_inc32(Assembler::zero, | |
898 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
899 } | |
900 jcc(Assembler::zero, done); | |
901 | |
902 // Test if the oopMark is an obvious stack pointer, i.e., | |
903 // 1) (mark & 7) == 0, and | |
904 // 2) rsp <= mark < mark + os::pagesize() | |
905 // | |
906 // These 3 tests can be done by evaluating the following | |
907 // expression: ((mark - rsp) & (7 - os::vm_page_size())), | |
908 // assuming both stack pointer and pagesize have their | |
909 // least significant 3 bits clear. | |
910 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
911 subq(swap_reg, rsp); | |
912 andq(swap_reg, 7 - os::vm_page_size()); | |
913 | |
914 // Save the test result, for recursive case, the result is zero | |
915 movq(Address(lock_reg, mark_offset), swap_reg); | |
916 | |
917 if (PrintBiasedLockingStatistics) { | |
918 cond_inc32(Assembler::zero, | |
919 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
920 } | |
921 jcc(Assembler::zero, done); | |
922 | |
923 bind(slow_case); | |
924 | |
925 // Call the runtime routine for slow case | |
926 call_VM(noreg, | |
927 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
928 lock_reg); | |
929 | |
930 bind(done); | |
931 } | |
932 } | |
933 | |
934 | |
935 // Unlocks an object. Used in monitorexit bytecode and | |
936 // remove_activation. Throws an IllegalMonitorException if object is | |
937 // not locked by current thread. | |
938 // | |
939 // Args: | |
940 // c_rarg1: BasicObjectLock for lock | |
941 // | |
942 // Kills: | |
943 // rax | |
944 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) | |
945 // rscratch1, rscratch2 (scratch regs) | |
946 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { | |
947 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1"); | |
948 | |
949 if (UseHeavyMonitors) { | |
950 call_VM(noreg, | |
951 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
952 lock_reg); | |
953 } else { | |
954 Label done; | |
955 | |
956 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
957 const Register header_reg = c_rarg2; // Will contain the old oopMark | |
958 const Register obj_reg = c_rarg3; // Will contain the oop | |
959 | |
960 save_bcp(); // Save in case of exception | |
961 | |
962 // Convert from BasicObjectLock structure to object and BasicLock | |
963 // structure Store the BasicLock address into %rax | |
964 leaq(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); | |
965 | |
966 // Load oop into obj_reg(%c_rarg3) | |
967 movq(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); | |
968 | |
969 // Free entry | |
970 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD); | |
971 | |
972 if (UseBiasedLocking) { | |
973 biased_locking_exit(obj_reg, header_reg, done); | |
974 } | |
975 | |
976 // Load the old header from BasicLock structure | |
977 movq(header_reg, Address(swap_reg, | |
978 BasicLock::displaced_header_offset_in_bytes())); | |
979 | |
980 // Test for recursion | |
981 testq(header_reg, header_reg); | |
982 | |
983 // zero for recursive case | |
984 jcc(Assembler::zero, done); | |
985 | |
986 // Atomic swap back the old header | |
987 if (os::is_MP()) lock(); | |
988 cmpxchgq(header_reg, Address(obj_reg, 0)); | |
989 | |
990 // zero for recursive case | |
991 jcc(Assembler::zero, done); | |
992 | |
993 // Call the runtime routine for slow case. | |
994 movq(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), | |
995 obj_reg); // restore obj | |
996 call_VM(noreg, | |
997 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
998 lock_reg); | |
999 | |
1000 bind(done); | |
1001 | |
1002 restore_bcp(); | |
1003 } | |
1004 } | |
1005 | |
1006 | |
1007 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, | |
1008 Label& zero_continue) { | |
1009 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1010 movq(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); | |
1011 testq(mdp, mdp); | |
1012 jcc(Assembler::zero, zero_continue); | |
1013 } | |
1014 | |
1015 | |
1016 // Set the method data pointer for the current bcp. | |
1017 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { | |
1018 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1019 Label zero_continue; | |
1020 pushq(rax); | |
1021 pushq(rbx); | |
1022 | |
1023 get_method(rbx); | |
1024 // Test MDO to avoid the call if it is NULL. | |
1025 movq(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); | |
1026 testq(rax, rax); | |
1027 jcc(Assembler::zero, zero_continue); | |
1028 | |
1029 // rbx: method | |
1030 // r13: bcp | |
1031 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13); | |
1032 // rax: mdi | |
1033 | |
1034 movq(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); | |
1035 testq(rbx, rbx); | |
1036 jcc(Assembler::zero, zero_continue); | |
1037 addq(rbx, in_bytes(methodDataOopDesc::data_offset())); | |
1038 addq(rbx, rax); | |
1039 movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rbx); | |
1040 | |
1041 bind(zero_continue); | |
1042 popq(rbx); | |
1043 popq(rax); | |
1044 } | |
1045 | |
1046 void InterpreterMacroAssembler::verify_method_data_pointer() { | |
1047 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1048 #ifdef ASSERT | |
1049 Label verify_continue; | |
1050 pushq(rax); | |
1051 pushq(rbx); | |
1052 pushq(c_rarg3); | |
1053 pushq(c_rarg2); | |
1054 test_method_data_pointer(c_rarg3, verify_continue); // If mdp is zero, continue | |
1055 get_method(rbx); | |
1056 | |
1057 // If the mdp is valid, it will point to a DataLayout header which is | |
1058 // consistent with the bcp. The converse is highly probable also. | |
1059 load_unsigned_word(c_rarg2, | |
1060 Address(c_rarg3, in_bytes(DataLayout::bci_offset()))); | |
1061 addq(c_rarg2, Address(rbx, methodOopDesc::const_offset())); | |
1062 leaq(c_rarg2, Address(c_rarg2, constMethodOopDesc::codes_offset())); | |
1063 cmpq(c_rarg2, r13); | |
1064 jcc(Assembler::equal, verify_continue); | |
1065 // rbx: method | |
1066 // r13: bcp | |
1067 // c_rarg3: mdp | |
1068 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), | |
1069 rbx, r13, c_rarg3); | |
1070 bind(verify_continue); | |
1071 popq(c_rarg2); | |
1072 popq(c_rarg3); | |
1073 popq(rbx); | |
1074 popq(rax); | |
1075 #endif // ASSERT | |
1076 } | |
1077 | |
1078 | |
1079 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, | |
1080 int constant, | |
1081 Register value) { | |
1082 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1083 Address data(mdp_in, constant); | |
1084 movq(data, value); | |
1085 } | |
1086 | |
1087 | |
1088 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
1089 int constant, | |
1090 bool decrement) { | |
1091 // Counter address | |
1092 Address data(mdp_in, constant); | |
1093 | |
1094 increment_mdp_data_at(data, decrement); | |
1095 } | |
1096 | |
1097 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, | |
1098 bool decrement) { | |
1099 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1100 | |
1101 if (decrement) { | |
1102 // Decrement the register. Set condition codes. | |
1103 addq(data, -DataLayout::counter_increment); | |
1104 // If the decrement causes the counter to overflow, stay negative | |
1105 Label L; | |
1106 jcc(Assembler::negative, L); | |
1107 addq(data, DataLayout::counter_increment); | |
1108 bind(L); | |
1109 } else { | |
1110 assert(DataLayout::counter_increment == 1, | |
1111 "flow-free idiom only works with 1"); | |
1112 // Increment the register. Set carry flag. | |
1113 addq(data, DataLayout::counter_increment); | |
1114 // If the increment causes the counter to overflow, pull back by 1. | |
1115 sbbq(data, 0); | |
1116 } | |
1117 } | |
1118 | |
1119 | |
1120 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
1121 Register reg, | |
1122 int constant, | |
1123 bool decrement) { | |
1124 Address data(mdp_in, reg, Address::times_1, constant); | |
1125 | |
1126 increment_mdp_data_at(data, decrement); | |
1127 } | |
1128 | |
1129 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, | |
1130 int flag_byte_constant) { | |
1131 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1132 int header_offset = in_bytes(DataLayout::header_offset()); | |
1133 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); | |
1134 // Set the flag | |
1135 orl(Address(mdp_in, header_offset), header_bits); | |
1136 } | |
1137 | |
1138 | |
1139 | |
1140 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, | |
1141 int offset, | |
1142 Register value, | |
1143 Register test_value_out, | |
1144 Label& not_equal_continue) { | |
1145 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1146 if (test_value_out == noreg) { | |
1147 cmpq(value, Address(mdp_in, offset)); | |
1148 } else { | |
1149 // Put the test value into a register, so caller can use it: | |
1150 movq(test_value_out, Address(mdp_in, offset)); | |
1151 cmpq(test_value_out, value); | |
1152 } | |
1153 jcc(Assembler::notEqual, not_equal_continue); | |
1154 } | |
1155 | |
1156 | |
1157 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
1158 int offset_of_disp) { | |
1159 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1160 Address disp_address(mdp_in, offset_of_disp); | |
1161 addq(mdp_in, disp_address); | |
1162 movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
1163 } | |
1164 | |
1165 | |
1166 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
1167 Register reg, | |
1168 int offset_of_disp) { | |
1169 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1170 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); | |
1171 addq(mdp_in, disp_address); | |
1172 movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
1173 } | |
1174 | |
1175 | |
1176 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, | |
1177 int constant) { | |
1178 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1179 addq(mdp_in, constant); | |
1180 movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
1181 } | |
1182 | |
1183 | |
1184 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { | |
1185 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1186 pushq(return_bci); // save/restore across call_VM | |
1187 call_VM(noreg, | |
1188 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), | |
1189 return_bci); | |
1190 popq(return_bci); | |
1191 } | |
1192 | |
1193 | |
1194 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, | |
1195 Register bumped_count) { | |
1196 if (ProfileInterpreter) { | |
1197 Label profile_continue; | |
1198 | |
1199 // If no method data exists, go to profile_continue. | |
1200 // Otherwise, assign to mdp | |
1201 test_method_data_pointer(mdp, profile_continue); | |
1202 | |
1203 // We are taking a branch. Increment the taken count. | |
1204 // We inline increment_mdp_data_at to return bumped_count in a register | |
1205 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); | |
1206 Address data(mdp, in_bytes(JumpData::taken_offset())); | |
1207 movq(bumped_count, data); | |
1208 assert(DataLayout::counter_increment == 1, | |
1209 "flow-free idiom only works with 1"); | |
1210 addq(bumped_count, DataLayout::counter_increment); | |
1211 sbbq(bumped_count, 0); | |
1212 movq(data, bumped_count); // Store back out | |
1213 | |
1214 // The method data pointer needs to be updated to reflect the new target. | |
1215 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); | |
1216 bind(profile_continue); | |
1217 } | |
1218 } | |
1219 | |
1220 | |
1221 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { | |
1222 if (ProfileInterpreter) { | |
1223 Label profile_continue; | |
1224 | |
1225 // If no method data exists, go to profile_continue. | |
1226 test_method_data_pointer(mdp, profile_continue); | |
1227 | |
1228 // We are taking a branch. Increment the not taken count. | |
1229 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); | |
1230 | |
1231 // The method data pointer needs to be updated to correspond to | |
1232 // the next bytecode | |
1233 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); | |
1234 bind(profile_continue); | |
1235 } | |
1236 } | |
1237 | |
1238 | |
1239 void InterpreterMacroAssembler::profile_call(Register mdp) { | |
1240 if (ProfileInterpreter) { | |
1241 Label profile_continue; | |
1242 | |
1243 // If no method data exists, go to profile_continue. | |
1244 test_method_data_pointer(mdp, profile_continue); | |
1245 | |
1246 // We are making a call. Increment the count. | |
1247 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1248 | |
1249 // The method data pointer needs to be updated to reflect the new target. | |
1250 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); | |
1251 bind(profile_continue); | |
1252 } | |
1253 } | |
1254 | |
1255 | |
1256 void InterpreterMacroAssembler::profile_final_call(Register mdp) { | |
1257 if (ProfileInterpreter) { | |
1258 Label profile_continue; | |
1259 | |
1260 // If no method data exists, go to profile_continue. | |
1261 test_method_data_pointer(mdp, profile_continue); | |
1262 | |
1263 // We are making a call. Increment the count. | |
1264 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1265 | |
1266 // The method data pointer needs to be updated to reflect the new target. | |
1267 update_mdp_by_constant(mdp, | |
1268 in_bytes(VirtualCallData:: | |
1269 virtual_call_data_size())); | |
1270 bind(profile_continue); | |
1271 } | |
1272 } | |
1273 | |
1274 | |
1275 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, | |
1276 Register mdp, | |
1277 Register reg2) { | |
1278 if (ProfileInterpreter) { | |
1279 Label profile_continue; | |
1280 | |
1281 // If no method data exists, go to profile_continue. | |
1282 test_method_data_pointer(mdp, profile_continue); | |
1283 | |
1284 // We are making a call. Increment the count. | |
1285 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1286 | |
1287 // Record the receiver type. | |
1288 record_klass_in_profile(receiver, mdp, reg2); | |
1289 | |
1290 // The method data pointer needs to be updated to reflect the new target. | |
1291 update_mdp_by_constant(mdp, | |
1292 in_bytes(VirtualCallData:: | |
1293 virtual_call_data_size())); | |
1294 bind(profile_continue); | |
1295 } | |
1296 } | |
1297 | |
1298 // This routine creates a state machine for updating the multi-row | |
1299 // type profile at a virtual call site (or other type-sensitive bytecode). | |
1300 // The machine visits each row (of receiver/count) until the receiver type | |
1301 // is found, or until it runs out of rows. At the same time, it remembers | |
1302 // the location of the first empty row. (An empty row records null for its | |
1303 // receiver, and can be allocated for a newly-observed receiver type.) | |
1304 // Because there are two degrees of freedom in the state, a simple linear | |
1305 // search will not work; it must be a decision tree. Hence this helper | |
1306 // function is recursive, to generate the required tree structured code. | |
1307 // It's the interpreter, so we are trading off code space for speed. | |
1308 // See below for example code. | |
1309 void InterpreterMacroAssembler::record_klass_in_profile_helper( | |
1310 Register receiver, Register mdp, | |
1311 Register reg2, | |
1312 int start_row, Label& done) { | |
1313 int last_row = VirtualCallData::row_limit() - 1; | |
1314 assert(start_row <= last_row, "must be work left to do"); | |
1315 // Test this row for both the receiver and for null. | |
1316 // Take any of three different outcomes: | |
1317 // 1. found receiver => increment count and goto done | |
1318 // 2. found null => keep looking for case 1, maybe allocate this cell | |
1319 // 3. found something else => keep looking for cases 1 and 2 | |
1320 // Case 3 is handled by a recursive call. | |
1321 for (int row = start_row; row <= last_row; row++) { | |
1322 Label next_test; | |
1323 bool test_for_null_also = (row == start_row); | |
1324 | |
1325 // See if the receiver is receiver[n]. | |
1326 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); | |
1327 test_mdp_data_at(mdp, recvr_offset, receiver, | |
1328 (test_for_null_also ? reg2 : noreg), | |
1329 next_test); | |
1330 // (Reg2 now contains the receiver from the CallData.) | |
1331 | |
1332 // The receiver is receiver[n]. Increment count[n]. | |
1333 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); | |
1334 increment_mdp_data_at(mdp, count_offset); | |
1335 jmp(done); | |
1336 bind(next_test); | |
1337 | |
1338 if (test_for_null_also) { | |
1339 // Failed the equality check on receiver[n]... Test for null. | |
1340 testq(reg2, reg2); | |
1341 if (start_row == last_row) { | |
1342 // The only thing left to do is handle the null case. | |
1343 jcc(Assembler::notZero, done); | |
1344 break; | |
1345 } | |
1346 // Since null is rare, make it be the branch-taken case. | |
1347 Label found_null; | |
1348 jcc(Assembler::zero, found_null); | |
1349 | |
1350 // Put all the "Case 3" tests here. | |
1351 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done); | |
1352 | |
1353 // Found a null. Keep searching for a matching receiver, | |
1354 // but remember that this is an empty (unused) slot. | |
1355 bind(found_null); | |
1356 } | |
1357 } | |
1358 | |
1359 // In the fall-through case, we found no matching receiver, but we | |
1360 // observed the receiver[start_row] is NULL. | |
1361 | |
1362 // Fill in the receiver field and increment the count. | |
1363 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); | |
1364 set_mdp_data_at(mdp, recvr_offset, receiver); | |
1365 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); | |
1366 movl(reg2, DataLayout::counter_increment); | |
1367 set_mdp_data_at(mdp, count_offset, reg2); | |
1368 jmp(done); | |
1369 } | |
1370 | |
1371 // Example state machine code for three profile rows: | |
1372 // // main copy of decision tree, rooted at row[1] | |
1373 // if (row[0].rec == rec) { row[0].incr(); goto done; } | |
1374 // if (row[0].rec != NULL) { | |
1375 // // inner copy of decision tree, rooted at row[1] | |
1376 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1377 // if (row[1].rec != NULL) { | |
1378 // // degenerate decision tree, rooted at row[2] | |
1379 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1380 // if (row[2].rec != NULL) { goto done; } // overflow | |
1381 // row[2].init(rec); goto done; | |
1382 // } else { | |
1383 // // remember row[1] is empty | |
1384 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1385 // row[1].init(rec); goto done; | |
1386 // } | |
1387 // } else { | |
1388 // // remember row[0] is empty | |
1389 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1390 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1391 // row[0].init(rec); goto done; | |
1392 // } | |
1393 | |
1394 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, | |
1395 Register mdp, | |
1396 Register reg2) { | |
1397 assert(ProfileInterpreter, "must be profiling"); | |
1398 Label done; | |
1399 | |
1400 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done); | |
1401 | |
1402 bind (done); | |
1403 } | |
1404 | |
1405 void InterpreterMacroAssembler::profile_ret(Register return_bci, | |
1406 Register mdp) { | |
1407 if (ProfileInterpreter) { | |
1408 Label profile_continue; | |
1409 uint row; | |
1410 | |
1411 // If no method data exists, go to profile_continue. | |
1412 test_method_data_pointer(mdp, profile_continue); | |
1413 | |
1414 // Update the total ret count. | |
1415 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1416 | |
1417 for (row = 0; row < RetData::row_limit(); row++) { | |
1418 Label next_test; | |
1419 | |
1420 // See if return_bci is equal to bci[n]: | |
1421 test_mdp_data_at(mdp, | |
1422 in_bytes(RetData::bci_offset(row)), | |
1423 return_bci, noreg, | |
1424 next_test); | |
1425 | |
1426 // return_bci is equal to bci[n]. Increment the count. | |
1427 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); | |
1428 | |
1429 // The method data pointer needs to be updated to reflect the new target. | |
1430 update_mdp_by_offset(mdp, | |
1431 in_bytes(RetData::bci_displacement_offset(row))); | |
1432 jmp(profile_continue); | |
1433 bind(next_test); | |
1434 } | |
1435 | |
1436 update_mdp_for_ret(return_bci); | |
1437 | |
1438 bind(profile_continue); | |
1439 } | |
1440 } | |
1441 | |
1442 | |
1443 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { | |
1444 if (ProfileInterpreter) { | |
1445 Label profile_continue; | |
1446 | |
1447 // If no method data exists, go to profile_continue. | |
1448 test_method_data_pointer(mdp, profile_continue); | |
1449 | |
1450 // The method data pointer needs to be updated. | |
1451 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1452 if (TypeProfileCasts) { | |
1453 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1454 } | |
1455 update_mdp_by_constant(mdp, mdp_delta); | |
1456 | |
1457 bind(profile_continue); | |
1458 } | |
1459 } | |
1460 | |
1461 | |
1462 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { | |
1463 if (ProfileInterpreter && TypeProfileCasts) { | |
1464 Label profile_continue; | |
1465 | |
1466 // If no method data exists, go to profile_continue. | |
1467 test_method_data_pointer(mdp, profile_continue); | |
1468 | |
1469 int count_offset = in_bytes(CounterData::count_offset()); | |
1470 // Back up the address, since we have already bumped the mdp. | |
1471 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); | |
1472 | |
1473 // *Decrement* the counter. We expect to see zero or small negatives. | |
1474 increment_mdp_data_at(mdp, count_offset, true); | |
1475 | |
1476 bind (profile_continue); | |
1477 } | |
1478 } | |
1479 | |
1480 | |
1481 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { | |
1482 if (ProfileInterpreter) { | |
1483 Label profile_continue; | |
1484 | |
1485 // If no method data exists, go to profile_continue. | |
1486 test_method_data_pointer(mdp, profile_continue); | |
1487 | |
1488 // The method data pointer needs to be updated. | |
1489 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1490 if (TypeProfileCasts) { | |
1491 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1492 | |
1493 // Record the object type. | |
1494 record_klass_in_profile(klass, mdp, reg2); | |
1495 } | |
1496 update_mdp_by_constant(mdp, mdp_delta); | |
1497 | |
1498 bind(profile_continue); | |
1499 } | |
1500 } | |
1501 | |
1502 | |
1503 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { | |
1504 if (ProfileInterpreter) { | |
1505 Label profile_continue; | |
1506 | |
1507 // If no method data exists, go to profile_continue. | |
1508 test_method_data_pointer(mdp, profile_continue); | |
1509 | |
1510 // Update the default case count | |
1511 increment_mdp_data_at(mdp, | |
1512 in_bytes(MultiBranchData::default_count_offset())); | |
1513 | |
1514 // The method data pointer needs to be updated. | |
1515 update_mdp_by_offset(mdp, | |
1516 in_bytes(MultiBranchData:: | |
1517 default_displacement_offset())); | |
1518 | |
1519 bind(profile_continue); | |
1520 } | |
1521 } | |
1522 | |
1523 | |
1524 void InterpreterMacroAssembler::profile_switch_case(Register index, | |
1525 Register mdp, | |
1526 Register reg2) { | |
1527 if (ProfileInterpreter) { | |
1528 Label profile_continue; | |
1529 | |
1530 // If no method data exists, go to profile_continue. | |
1531 test_method_data_pointer(mdp, profile_continue); | |
1532 | |
1533 // Build the base (index * per_case_size_in_bytes()) + | |
1534 // case_array_offset_in_bytes() | |
1535 movl(reg2, in_bytes(MultiBranchData::per_case_size())); | |
1536 imulq(index, reg2); // XXX l ? | |
1537 addq(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? | |
1538 | |
1539 // Update the case count | |
1540 increment_mdp_data_at(mdp, | |
1541 index, | |
1542 in_bytes(MultiBranchData::relative_count_offset())); | |
1543 | |
1544 // The method data pointer needs to be updated. | |
1545 update_mdp_by_offset(mdp, | |
1546 index, | |
1547 in_bytes(MultiBranchData:: | |
1548 relative_displacement_offset())); | |
1549 | |
1550 bind(profile_continue); | |
1551 } | |
1552 } | |
1553 | |
1554 | |
1555 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { | |
1556 if (state == atos) { | |
1557 MacroAssembler::verify_oop(reg); | |
1558 } | |
1559 } | |
1560 | |
1561 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { | |
1562 } | |
1563 | |
1564 | |
1565 void InterpreterMacroAssembler::notify_method_entry() { | |
1566 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1567 // track stack depth. If it is possible to enter interp_only_mode we add | |
1568 // the code to check if the event should be sent. | |
1569 if (JvmtiExport::can_post_interpreter_events()) { | |
1570 Label L; | |
1571 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); | |
1572 testl(rdx, rdx); | |
1573 jcc(Assembler::zero, L); | |
1574 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
1575 InterpreterRuntime::post_method_entry)); | |
1576 bind(L); | |
1577 } | |
1578 | |
1579 { | |
1580 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
1581 get_method(c_rarg1); | |
1582 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1583 r15_thread, c_rarg1); | |
1584 } | |
1585 } | |
1586 | |
1587 | |
1588 void InterpreterMacroAssembler::notify_method_exit( | |
1589 TosState state, NotifyMethodExitMode mode) { | |
1590 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1591 // track stack depth. If it is possible to enter interp_only_mode we add | |
1592 // the code to check if the event should be sent. | |
1593 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { | |
1594 Label L; | |
1595 // Note: frame::interpreter_frame_result has a dependency on how the | |
1596 // method result is saved across the call to post_method_exit. If this | |
1597 // is changed then the interpreter_frame_result implementation will | |
1598 // need to be updated too. | |
1599 push(state); | |
1600 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); | |
1601 testl(rdx, rdx); | |
1602 jcc(Assembler::zero, L); | |
1603 call_VM(noreg, | |
1604 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); | |
1605 bind(L); | |
1606 pop(state); | |
1607 } | |
1608 | |
1609 { | |
1610 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
1611 push(state); | |
1612 get_method(c_rarg1); | |
1613 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1614 r15_thread, c_rarg1); | |
1615 pop(state); | |
1616 } | |
1617 } |