Sat, 07 May 2016 07:38:03 -0400
[Interpreter] ProfileInterpreter: fix unaligned lwu
When running compress in debug mode,
/mnt/j2sdk-image/bin/java \
-Xmx68M -Xms68M \
-XX:CompileCommand="compileonly,spec/benchmarks/compress/Decompressor\$SuffixTable.of1" \
-XX:+PrintCompilation \
-XX:-CICompileNatives \
-XX:+ProfileInterpreter \
-XX:-UseTLAB \
-XX:+UseLoopCounter \
-XX:+UseOnStackReplacement \
-XX:+UseSerialGC \
-jar SPECjvm2008.jar -ikv -coe -ict -bt 1 \
compress
Though no method is compiled, the unaligned counter reaches 779990 /s.
This error doesn't exist in product version.
Effect:
- compress + debug + +ProfileInterpreter: 0 unaligned access
1 /*
2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2015, 2016, Loongson Technology. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
26 #include "precompiled.hpp"
27 #include "interp_masm_mips_64.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/interpreterRuntime.hpp"
30 #include "oops/arrayOop.hpp"
31 #include "oops/markOop.hpp"
32 #include "oops/methodData.hpp"
33 #include "oops/method.hpp"
34 #include "prims/jvmtiExport.hpp"
35 #include "prims/jvmtiRedefineClassesTrace.hpp"
36 #include "prims/jvmtiThreadState.hpp"
37 #include "runtime/basicLock.hpp"
38 #include "runtime/biasedLocking.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/thread.inline.hpp"
43 // Implementation of InterpreterMacroAssembler
45 #ifdef CC_INTERP
46 void InterpreterMacroAssembler::get_method(Register reg) {
47 }
48 #endif // CC_INTERP
50 #ifndef CC_INTERP
52 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
53 int number_of_arguments) {
54 // interpreter specific
55 //
56 // Note: No need to save/restore bcp & locals (r13 & r14) pointer
57 // since these are callee saved registers and no blocking/
58 // GC can happen in leaf calls.
59 // Further Note: DO NOT save/restore bcp/locals. If a caller has
60 // already saved them so that it can use esi/edi as temporaries
61 // then a save/restore here will DESTROY the copy the caller
62 // saved! There used to be a save_bcp() that only happened in
63 // the ASSERT path (no restore_bcp). Which caused bizarre failures
64 // when jvm built with ASSERTs.
65 /*
66 #ifdef ASSERT
67 {
68 Label L;
69 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
70 jcc(Assembler::equal, L);
71 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
72 " last_sp != NULL");
73 bind(L);
74 }
75 #endif
76 // super call
77 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
78 // interpreter specific
79 // Used to ASSERT that r13/r14 were equal to frame's bcp/locals
80 // but since they may not have been saved (and we don't want to
81 // save thme here (see note above) the assert is invalid.
82 */
83 #ifdef ASSERT
84 save_bcp();
85 { Label L;
86 //cmpl(Address(ebp, frame::interpreter_frame_last_sp_offset * wordSize),
87 //NULL_WORD);
88 ld(AT,FP,frame::interpreter_frame_last_sp_offset * wordSize);
89 // jcc(Assembler::equal, L);
90 beq(AT,R0,L);
91 delayed()->nop();
92 stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL");
93 bind(L);
94 }
95 #endif
96 // super call
97 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
98 // interpreter specific
99 #ifdef ASSERT
100 { Label L;
101 ld(T3, FP, frame::interpreter_frame_bcx_offset * wordSize);
102 Assembler::beq(BCP, T3, L);
103 delayed()->nop();
104 stop("InterpreterMacroAssembler::call_VM_leaf_base: esi not callee saved?");
105 bind(L);
106 }
107 { Label L;
108 ld(T3, FP, frame::interpreter_frame_locals_offset * wordSize);
109 Assembler::beq(LVP, T3, L);
110 delayed()->nop();
111 stop("InterpreterMacroAssembler::call_VM_leaf_base: edi not callee saved?");
112 bind(L);
113 }
114 #endif
115 }
117 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
118 Register java_thread,
119 Register last_java_sp,
120 address entry_point,
121 int number_of_arguments,
122 bool check_exceptions) {
123 #if 0
124 // interpreter specific
125 //
126 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
127 // really make a difference for these runtime calls, since they are
128 // slow anyway. Btw., bcp must be saved/restored since it may change
129 // due to GC.
130 // assert(java_thread == noreg , "not expecting a precomputed java thread");
131 save_bcp();
132 #ifdef ASSERT
133 {
134 Label L;
135 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
136 jcc(Assembler::equal, L);
137 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
138 " last_sp != NULL");
139 bind(L);
140 }
141 #endif /* ASSERT */
142 // super call
143 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
144 entry_point, number_of_arguments,
145 check_exceptions);
146 // interpreter specific
147 restore_bcp();
148 restore_locals();
149 #endif
150 #ifdef ASSERT
151 { Label L;
152 // cmpl(Address(ebp, frame::interpreter_frame_last_sp_offset * wordSize),
153 // NULL_WORD);
154 // jcc(Assembler::equal, L);
155 ld(AT, FP, frame::interpreter_frame_last_sp_offset * wordSize);
156 beq(AT, R0, L);
157 delayed()->nop();
158 stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL");
159 bind(L);
160 }
161 #endif /* ASSERT */
162 // interpreter specific
163 //
164 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
165 // really make a difference for these runtime calls, since they are
166 // slow anyway. Btw., bcp must be saved/restored since it may change
167 // due to GC.
168 assert(java_thread == noreg , "not expecting a precomputed java thread");
169 save_bcp();
170 // super call
171 MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
172 restore_bcp();
173 restore_locals();
174 }
177 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
178 if (JvmtiExport::can_pop_frame()) {
179 Label L;
180 // Initiate popframe handling only if it is not already being
181 // processed. If the flag has the popframe_processing bit set, it
182 // means that this code is called *during* popframe handling - we
183 // don't want to reenter.
184 // This method is only called just after the call into the vm in
185 // call_VM_base, so the arg registers are available.
186 /*
187 movl(c_rarg0, Address(r15_thread, JavaThread::popframe_condition_offset()));
188 testl(c_rarg0, JavaThread::popframe_pending_bit);
189 jcc(Assembler::zero, L);
190 testl(c_rarg0, JavaThread::popframe_processing_bit);
191 jcc(Assembler::notZero, L);
192 // Call Interpreter::remove_activation_preserving_args_entry() to get the
193 // address of the same-named entrypoint in the generated interpreter code.
194 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
195 jmp(rax);
196 bind(L);
197 */
198 Register pop_cond = java_thread;
199 // Not clear if any other register is available...
200 lw(pop_cond, java_thread, in_bytes(JavaThread::popframe_condition_offset()));
201 andi(AT, pop_cond, JavaThread::popframe_pending_bit);
202 beq(AT, R0, L);
203 delayed()->andi(AT, pop_cond, JavaThread::popframe_processing_bit);
204 bne(AT, R0, L);
205 delayed()->nop();
206 call( CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry), relocInfo::runtime_call_type);
207 delayed()->nop();
208 jr(V0);
209 delayed()->nop();
210 bind(L);
211 get_thread(java_thread);
212 }
213 }
216 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
217 //T8, thread
218 get_thread(T8);
219 ld_ptr(T8, T8,in_bytes(JavaThread::jvmti_thread_state_offset()));
220 /*
221 const Address tos_addr (ecx, JvmtiThreadState::earlyret_tos_offset());
222 const Address oop_addr (ecx, JvmtiThreadState::earlyret_oop_offset());
223 const Address val_addr (ecx, JvmtiThreadState::earlyret_value_offset());
224 const Address val_addr1(ecx, JvmtiThreadState::earlyret_value_offset()
225 + in_ByteSize(wordSize));
226 */
227 const Address tos_addr (T8, in_bytes(JvmtiThreadState::earlyret_tos_offset()));
228 const Address oop_addr (T8, in_bytes(JvmtiThreadState::earlyret_oop_offset()));
229 const Address val_addr (T8, in_bytes(JvmtiThreadState::earlyret_value_offset()));
230 //V0, oop_addr,V1,val_addr
231 switch (state) {
232 case atos:
233 //movl(eax, oop_addr);
234 ld_ptr(V0, oop_addr);
235 // movl(oop_addr, NULL_WORD);
236 st_ptr(R0, oop_addr);
237 //verify_oop(eax, state); break;
238 verify_oop(V0, state);
239 break;
240 case ltos:
241 // movl(edx, val_addr1); // fall through
242 ld_ptr(V0, val_addr); // fall through
243 break;
244 case btos: // fall through
245 case ctos: // fall through
246 case stos: // fall through
247 case itos:
248 // movl(eax, val_addr);
249 lw(V0, val_addr);
250 break;
251 //FIXME ,I hava no idear fld store to where @jerome
252 case ftos:
253 //fld_s(val_addr);
254 lwc1(F0,T8, in_bytes(JvmtiThreadState::earlyret_value_offset()));
255 break;
256 case dtos:
257 //fld_d(val_addr);
258 ldc1(F0,T8, in_bytes(JvmtiThreadState::earlyret_value_offset()));
259 break;
260 case vtos: /* nothing to do */ break;
261 default : ShouldNotReachHere();
262 }
263 // Clean up tos value in the thread object
264 // movl(tos_addr, (int) ilgl);
265 //addi(AT,R0,(int)ilgl);
266 move(AT, (int)ilgl);
267 sw(AT, tos_addr);
268 // movl(val_addr, NULL_WORD);
269 sw(R0,T8, in_bytes(JvmtiThreadState::earlyret_value_offset()));
270 }
273 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
274 if (JvmtiExport::can_force_early_return()) {
275 Label L;
276 Register tmp = T9;
278 //movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
279 ld_ptr(AT,java_thread, in_bytes(JavaThread::jvmti_thread_state_offset()));
280 //testptr(c_rarg0, c_rarg0);
281 //jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
282 beq(AT,R0,L);
283 delayed()->nop();
285 // Initiate earlyret handling only if it is not already being processed.
286 // If the flag has the earlyret_processing bit set, it means that this code
287 // is called *during* earlyret handling - we don't want to reenter.
288 //movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_state_offset()));
289 lw(AT, AT, in_bytes(JvmtiThreadState::earlyret_state_offset()));
290 //cmpl(c_rarg0, JvmtiThreadState::earlyret_pending);
291 //jcc(Assembler::notEqual, L);
292 move(tmp, JvmtiThreadState::earlyret_pending);
293 bne(tmp, AT, L);
294 delayed()->nop();
295 get_thread(java_thread);
297 // Call Interpreter::remove_activation_early_entry() to get the address of the
298 // same-named entrypoint in the generated interpreter code.
299 //movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
300 ld_ptr(tmp,java_thread, in_bytes(JavaThread::jvmti_thread_state_offset()));
301 //movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_tos_offset()));
302 lw(AT,tmp, in_bytes(JvmtiThreadState::earlyret_tos_offset()));
303 move(A0, AT);
304 //push(AT);
305 call(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry),
306 relocInfo::runtime_call_type);
307 //call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), c_rarg0);
308 //jmp(rax);
309 //bind(L);
310 jr(V0);
311 delayed()->nop();
312 bind(L);
313 get_thread(java_thread);
314 }
315 }
318 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(
319 Register reg,
320 int bcp_offset) {
321 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
322 load_two_bytes_from_at_bcp(reg, AT, bcp_offset);
323 hswap(reg);
324 }
327 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
328 Register index,
329 int bcp_offset,
330 size_t index_size) {
331 assert_different_registers(cache, index);
332 get_cache_index_at_bcp(index, bcp_offset, index_size);
333 ld(cache, FP, frame::interpreter_frame_cache_offset * wordSize);
334 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
335 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
336 shl(index, 2);
337 }
339 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
340 Register index,
341 Register bytecode,
342 int byte_no,
343 int bcp_offset,
344 size_t index_size) {
345 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
346 // We use a 32-bit load here since the layout of 64-bit words on
347 // little-endian machines allow us that.
348 dsll(AT, index, Address::times_ptr);
349 dadd(AT, cache, AT);
350 lw(bytecode, AT, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
352 const int shift_count = (1 + byte_no) * BitsPerByte;
353 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
354 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
355 "correct shift count");
356 dsrl(bytecode, bytecode, shift_count);
357 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
358 move(AT, ConstantPoolCacheEntry::bytecode_1_mask);
359 andr(bytecode, bytecode, AT);
360 }
362 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
363 Register tmp,
364 int bcp_offset, size_t index_size) {
365 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
366 assert(cache != tmp, "must use different register");
368 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
369 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
370 // convert from field index to ConstantPoolCacheEntry index
371 // and from word offset to byte offset
372 dsll(tmp, tmp, 2+LogBytesPerWord);
373 ld(cache, FP, frame::interpreter_frame_cache_offset * wordSize);
374 // skip past the header
375 daddi(cache, cache, in_bytes(ConstantPoolCache::base_offset()));
376 dadd(cache, cache, AT);
377 }
379 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
380 int bcp_offset,
381 size_t index_size) {
382 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
383 if (index_size == sizeof(u2)) {
384 load_two_bytes_from_at_bcp(index, AT, bcp_offset);
385 } else if (index_size == sizeof(u4)) {
386 assert(EnableInvokeDynamic, "giant index used only for JSR 292");
387 lwu(index, BCP, bcp_offset);
388 // Check if the secondary index definition is still ~x, otherwise
389 // we have to change the following assembler code to calculate the
390 // plain index.
391 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
392 nor(index, index, R0);
393 sll(index, index, 0);
394 } else if (index_size == sizeof(u1)) {
395 lbu(index, BCP, bcp_offset);
396 } else {
397 ShouldNotReachHere();
398 }
399 }
401 void InterpreterMacroAssembler::get_method_counters(Register method,
402 Register mcs, Label& skip) {
403 Label has_counters;
404 ld(mcs, method, in_bytes(Method::method_counters_offset()));
405 bne(mcs, R0, has_counters);
406 nop();
407 call_VM(noreg, CAST_FROM_FN_PTR(address,
408 InterpreterRuntime::build_method_counters), method);
409 ld(mcs, method, in_bytes(Method::method_counters_offset()));
410 beq(mcs, R0, skip); // No MethodCounters allocated, OutOfMemory
411 nop();
412 bind(has_counters);
413 }
415 // Load object from cpool->resolved_references(index)
416 void InterpreterMacroAssembler::load_resolved_reference_at_index(
417 Register result, Register index) {
418 assert_different_registers(result, index);
419 // convert from field index to resolved_references() index and from
420 // word index to byte offset. Since this is a java object, it can be compressed
421 Register tmp = index; // reuse
422 shl(tmp, LogBytesPerHeapOop);
424 get_constant_pool(result);
425 // load pointer for resolved_references[] objArray
426 ld(result, result, ConstantPool::resolved_references_offset_in_bytes());
427 // JNIHandles::resolve(obj);
428 // movptr(result, Address(result, 0));
429 ld(result, result, 0); //? is needed?
430 // Add in the index
431 dadd(result, result, tmp);
432 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
433 }
435 // Resets LVP to locals. Register sub_klass cannot be any of the above.
436 void InterpreterMacroAssembler::gen_subtype_check( Register Rsup_klass, Register Rsub_klass, Label &ok_is_subtype ) {
437 assert( Rsub_klass != Rsup_klass, "Rsup_klass holds superklass" );
438 assert( Rsub_klass != T1, "T1 holds 2ndary super array length" );
439 assert( Rsub_klass != T0, "T0 holds 2ndary super array scan ptr" );
440 // Profile the not-null value's klass.
441 // [20130904] Fu: Here T9 and T1 are used as temporary registers.
442 profile_typecheck(T9, Rsub_klass, T1); // blows rcx, reloads rdi
444 // Do the check.
445 check_klass_subtype(Rsub_klass, Rsup_klass, T1, ok_is_subtype); // blows rcx
447 // Profile the failure of the check.
448 profile_typecheck_failed(T9); // blows rcx
449 }
453 // Java Expression Stack
455 void InterpreterMacroAssembler::pop_ptr(Register r) {
456 pop(r);
457 //if (TaggedStackInterpreter) addptr(rsp, 1 * wordSize);
458 // if (TaggedStackInterpreter) addi(SP,SP, 1 * wordSize);
459 }
460 /*
461 void InterpreterMacroAssembler::pop_ptr(Register r, Register tag) {
462 pop(r);
463 // if (TaggedStackInterpreter) pop(tag);
464 }*/
466 void InterpreterMacroAssembler::pop_i(Register r) {
467 // XXX can't use pop currently, upper half non clean
468 //movl(r, Address(rsp, 0));
469 //addptr(rsp, wordSize);
470 lw(r, SP, 0);
471 daddi(SP, SP, 8);
472 //if (TaggedStackInterpreter) addptr(rsp, 1 * wordSize);
473 // if (TaggedStackInterpreter) addi(SP,SP, 1 * wordSize);
474 }
475 /*
476 void InterpreterMacroAssembler::pop_l(Register r) {
477 //movq(r, Address(rsp, 0));
478 //addptr(rsp, 2 * Interpreter::stackElementSize());
479 //FIXME, this directly call assembler. by aoqi
480 ld(r, SP, 0);
481 addi(SP, SP, 8);
482 if (TaggedStackInterpreter) addi(SP,SP, 2 * wordSize);
483 }
484 */
485 //FIXME How many registers do push_l & pop_l use? aoqi
486 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
487 pop(lo);
488 //if (TaggedStackInterpreter) daddi(SP,SP, 1 * wordSize);
489 pop(hi);
490 //if (TaggedStackInterpreter) daddi(SP,SP, 1 * wordSize);
491 }
493 void InterpreterMacroAssembler::pop_f() {
494 lwc1(FSF, SP, 0);
495 daddi(SP, SP, 1 * wordSize);
496 // if (TaggedStackInterpreter) addi(SP,SP, 1 * wordSize);
497 }
499 void InterpreterMacroAssembler::pop_d() {
500 pop_dtos_to_esp();
501 ldc1(FSF, SP, 0);
502 daddi(SP, SP, 2 * wordSize);
503 }
505 // Pop the top of the java expression stack to execution stack (which
506 // happens to be the same place).
507 //FIXME ,I hava no idea which register to use
508 void InterpreterMacroAssembler::pop_dtos_to_esp() {
509 /* if (TaggedStackInterpreter) {
510 // Pop double value into scratch registers
511 // popl(eax);
512 pop(V0);
513 //addl(esp, 1* wordSize);
514 addi(SP,SP, 1* wordSize);
515 //popl(edx);
516 pop(V1);
517 //addl(esp, 1* wordSize);
518 addi(SP,SP, 1* wordSize);
519 // pushl(edx);
520 push(V1);
521 //pushl(eax);
522 push(V0);
523 }*/
524 }
526 void InterpreterMacroAssembler::pop_ftos_to_esp() {
527 /* if (TaggedStackInterpreter) {
528 // popl(eax);
529 pop(V0);
530 //addl(esp, 1 * wordSize);
531 addi(SP,SP, 1 * wordSize);
532 // pushl(eax); // ftos is at esp
533 push(V0); // ftos is at esp
534 }*/
535 }
537 void InterpreterMacroAssembler::push_ptr(Register r) {
538 //if (TaggedStackInterpreter) push(frame::TagReference);
539 /* if (TaggedStackInterpreter) {
540 move(AT, frame::TagReference);
541 push(AT);
542 }//pushl(r);*/
543 push(r);
544 }
545 /*
546 void InterpreterMacroAssembler::push_ptr(Register r, Register tag) {
547 //if (TaggedStackInterpreter) push(tag);
548 if (TaggedStackInterpreter){
549 move(AT, tag);
550 push(AT); // tag first
551 }
552 push(r);
553 }*/
555 void InterpreterMacroAssembler::push_i(Register r) {
556 //if (TaggedStackInterpreter) push(frame::TagValue);
557 /* if (TaggedStackInterpreter) {
558 move(AT, frame::TagValue);
559 push(AT);
560 }*/
561 push(r);
562 }
563 /*
564 void InterpreterMacroAssembler::push_l(Register r) {
565 if (TaggedStackInterpreter) {
566 //push(frame::TagValue);
567 //subptr(rsp, 1 * wordSize);
568 //push(frame::TagValue);
569 //subptr(rsp, 1 * wordSize);
570 move(AT, frame::TagValue);
571 push(AT);
572 } else {
573 addi(SP, SP, (-2) * wordSize);
574 }
575 //movq(Address(rsp, 0), r);
576 //FIXME, same as pop_l
577 sd(r, SP, 0);
578 }
579 */
580 //FIXME How many registers do push_l & pop_l use? aoqi
581 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
582 //if (TaggedStackInterpreter) pushl(frame::TagValue);
583 /*if (TaggedStackInterpreter) {
584 move(AT, frame::TagValue);
585 push(AT);
586 }*/
587 //pushl(hi);
588 push(hi);
589 //if (TaggedStackInterpreter) pushl(frame::TagValue);
590 /* if (TaggedStackInterpreter) {
591 move(AT, frame::TagValue);
592 push(AT);
593 }*/
594 //pushl(lo);
595 push(lo);
596 }
597 //void InterpreterMacroAssembler::push_f(XMMRegister r) {
598 void InterpreterMacroAssembler::push_f() {
599 /* if (TaggedStackInterpreter) {
600 move(AT, frame::TagValue);
601 push(AT);
602 }// Do not schedule for no AGI! Never write beyond esp!*/
603 daddi(SP, SP, (-1) * wordSize);
604 swc1(FSF, SP, 0 * wordSize);
605 sw(R0, SP, 4);
606 }
608 //FIXME. aoqi
609 void InterpreterMacroAssembler::push_d(FloatRegister r) {
610 /* if (TaggedStackInterpreter) {
611 move(AT, frame::TagValue);
612 push(AT);
613 addi(SP, SP, (-3) * wordSize);
614 swc1(FSF, SP, 0 * wordSize);
615 swc1(SSF, SP, 1 * wordSize);
617 lwc1(r, SP, 1*wordSize);
618 swc1(r, SP, 2*wordSize);
619 move(AT, frame::TagValue);
620 sw(AT, SP, 1*wordSize);
621 } else {*/
622 daddi(SP, SP, (-2) * wordSize);
623 sdc1(FSF, SP, 0 * wordSize);
624 sdc1(SSF, SP, 1 * wordSize);
625 // }
626 }
628 void InterpreterMacroAssembler::pop(TosState state) {
629 switch (state) {
630 case atos: pop(FSR); break;
631 case btos:
632 case ctos:
633 case stos:
634 case itos:
635 pop_i(FSR);
636 break;
637 case ltos:
638 pop_l(FSR, SSR);
639 break;
640 case ftos: pop_f(); break;
641 case dtos: pop_d(); break;
642 case vtos: /* nothing to do */ break;
643 default: ShouldNotReachHere();
644 }
645 verify_oop(V0, state);
646 }
648 //FSR=V0,SSR=V1
649 void InterpreterMacroAssembler::push(TosState state) {
650 verify_oop(V0, state);
651 switch (state) {
652 case atos: push(FSR); break;
653 case btos: // fall through
654 case ctos: // fall through
655 case stos: // fall through
656 case itos:
657 push_i(FSR);
658 break;
659 case ltos:
660 //FIXME aoqi.
661 daddi(SP, SP, (-2) * wordSize);
662 //sd(SSR, SP, 1 * wordSize);
663 sd(R0, SP, 1 * wordSize);
664 sd(FSR, SP, 0 * wordSize);
665 break;
666 case ftos:
667 push_f();
668 break;
669 case dtos:
670 //FIXME, I have no idea which register to use
671 push_d(FSF);
672 break;
673 case vtos: /* nothing to do */ break;
674 default : ShouldNotReachHere();
675 }
676 }
681 // Tagged stack helpers for swap and dup
682 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
683 ld(val, SP, Interpreter::expr_offset_in_bytes(n));
684 /*if (TaggedStackInterpreter) {
685 ld(tag, SP, Interpreter::expr_tag_offset_in_bytes(n));
686 }*/
687 }
689 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
690 sd(val, SP, Interpreter::expr_offset_in_bytes(n));
691 /* if (TaggedStackInterpreter) {
692 //movptr(Address(rsp, Interpreter::expr_tag_offset_in_bytes(n)), tag);
693 sd(tag, SP, Interpreter::expr_tag_offset_in_bytes(n));
694 }*/
695 }
697 /*
698 // Tagged local support
699 //LVP=S7, local variable pointer register , FIXME
700 void InterpreterMacroAssembler::tag_local(frame::Tag tag, int n) {
701 if (TaggedStackInterpreter) {
702 if (tag == frame::TagCategory2) {
703 //movptr(Address(r14, Interpreter::local_tag_offset_in_bytes(n+1)),
704 // (int32_t)frame::TagValue);
705 move(AT, (int)frame::TagValue);
706 sw(AT,LVP, Interpreter::local_tag_offset_in_bytes(n+1));
707 //movptr(Address(r14, Interpreter::local_tag_offset_in_bytes(n)),
708 // (int32_t)frame::TagValue);
709 sw(AT,LVP, Interpreter::local_tag_offset_in_bytes(n));
710 } else {
711 //movptr(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), (int32_t)tag);
712 move(AT, (int)tag);
713 sw(AT,LVP, Interpreter::local_tag_offset_in_bytes(n));
714 }
715 }
716 }
718 void InterpreterMacroAssembler::tag_local(frame::Tag tag, Register idx) {
719 if (TaggedStackInterpreter) {
720 if (tag == frame::TagCategory2) {
721 //movptr(Address(r14, idx, Address::times_8,
722 // Interpreter::local_tag_offset_in_bytes(1)), (int32_t)frame::TagValue);
723 //movptr(Address(r14, idx, Address::times_8,
724 // Interpreter::local_tag_offset_in_bytes(0)), (int32_t)frame::TagValue);
725 shl(idx, 3);
726 add(idx,LVP,idx);
727 move(AT,(int)frame::TagValue);
728 sw(AT, idx, Interpreter::local_tag_offset_in_bytes(1));
729 shl(idx, 3);
730 add(idx,LVP,idx);
731 move(AT,(int)frame::TagValue);
732 sw(AT, idx, Interpreter::local_tag_offset_in_bytes(0));
733 } else {
734 //movptr(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)),
735 // (int32_t)tag);
736 shl(idx, 3);
737 add(idx,LVP,idx);
738 move(AT,(int)tag);
739 sw(AT, idx, Interpreter::local_tag_offset_in_bytes(0));
740 }
741 }
742 }
744 void InterpreterMacroAssembler::tag_local(Register tag, Register idx) {
745 if (TaggedStackInterpreter) {
746 // can only be TagValue or TagReference
747 //movptr(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), tag);
748 shl(idx, 3);
749 add(idx,LVP,idx);
750 sw(tag, idx, Interpreter::local_tag_offset_in_bytes(0));
751 }
752 }
755 void InterpreterMacroAssembler::tag_local(Register tag, int n) {
756 if (TaggedStackInterpreter) {
757 // can only be TagValue or TagReference
758 //movptr(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), tag);
759 sw(tag, LVP, Interpreter::local_tag_offset_in_bytes(n));
760 }
761 }
763 #ifdef ASSERT
764 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, int n) {
765 if (TaggedStackInterpreter) {
766 frame::Tag t = tag;
767 if (tag == frame::TagCategory2) {
768 Label nbl;
769 t = frame::TagValue; // change to what is stored in locals
770 //cmpptr(Address(r14, Interpreter::local_tag_offset_in_bytes(n+1)), (int32_t)t);
771 //jcc(Assembler::equal, nbl);
772 lw(AT, LVP, Interpreter::local_tag_offset_in_bytes(n+1));
773 addi(AT,AT, -(int)t);
774 beq(AT, R0, nbl);
775 delayed()->nop();
776 stop("Local tag is bad for long/double");
777 bind(nbl);
778 }
779 Label notBad;
780 //cmpq(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), (int32_t)t);
781 //jcc(Assembler::equal, notBad);
782 lw(AT, LVP, Interpreter::local_tag_offset_in_bytes(n));
783 addi(AT,AT, -(int)t);
784 beq(AT, R0, notBad);
785 delayed()->nop();
787 // Also compare if the local value is zero, then the tag might
788 // not have been set coming from deopt.
789 //cmpptr(Address(r14, Interpreter::local_offset_in_bytes(n)), 0);
790 //jcc(Assembler::equal, notBad);
791 lw(AT, LVP, Interpreter::local_tag_offset_in_bytes(n+1));
792 beq(AT, R0, notBad);
793 delayed()->nop();
794 stop("Local tag is bad");
795 bind(notBad);
796 }
797 }
799 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, Register idx) {
800 if (TaggedStackInterpreter) {
801 frame::Tag t = tag;
802 if (tag == frame::TagCategory2) {
803 Label nbl;
804 t = frame::TagValue; // change to what is stored in locals
805 //cmpptr(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(1)), (int32_t)t);
806 //jcc(Assembler::equal, nbl);
807 shl(idx, 3);
808 add(idx,LVP,idx);
809 lw(AT, idx, Interpreter::local_tag_offset_in_bytes(1));
810 addi(AT,AT, -(int)t);
811 beq(AT,R0, nbl);
812 delayed()->nop();
813 stop("Local tag is bad for long/double");
814 bind(nbl);
815 }
816 Label notBad;
817 //cmpptr(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), (int32_t)t);
818 //jcc(Assembler::equal, notBad);
819 shl(idx, 3);
820 add(idx,LVP,idx);
821 lw(AT, idx, Interpreter::local_tag_offset_in_bytes(0));
822 addi(AT,AT, -(int)t);
823 beq(AT,R0, notBad);
824 delayed()->nop();
826 // Also compare if the local value is zero, then the tag might
827 // not have been set coming from deopt.
828 //cmpptr(Address(r14, idx, Address::times_8, Interpreter::local_offset_in_bytes(0)), 0);
829 //jcc(Assembler::equal, notBad);
830 shl(idx, 3);
831 add(idx,LVP,idx);
832 lw(AT, idx, Interpreter::local_tag_offset_in_bytes(0));
833 beq(AT,R0, notBad);
834 delayed()->nop();
835 stop("Local tag is bad");
836 bind(notBad);
837 }
838 }
839 #endif // ASSERT
840 */
841 /*
842 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point) {
843 MacroAssembler::call_VM_leaf_base(entry_point, 0);
844 }
847 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
848 Register arg_1) {
849 if (arg_1 != A0) move(A0, arg_1);
850 MacroAssembler::call_VM_leaf_base(entry_point, 1);
851 }
854 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
855 Register arg_1,
856 Register arg_2) {
857 if (arg_1 != A0) move(A0, arg_1);
858 if (arg_2 != A1) move(A1, arg_2); assert(arg_2 != A0, "smashed argument");
859 MacroAssembler::call_VM_leaf_base(entry_point, 2);
860 }
862 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
863 Register arg_1,
864 Register arg_2,
865 Register arg_3) {
866 if (arg_1 != A0) move(A0, arg_1);
867 if (arg_2 != A1) move(A1, arg_2); assert(arg_2 != A0, "smashed argument");
868 if (arg_3 != A2) move(A2, arg_3); assert(arg_3 != A0 && arg_3 != A1, "smashed argument");
869 MacroAssembler::call_VM_leaf_base(entry_point, 3);
870 }
871 */
872 // Jump to from_interpreted entry of a call unless single stepping is possible
873 // in this thread in which case we must call the i2i entry
874 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
875 // record last_sp
876 move(Rsender, SP);
877 sd(SP, FP, frame::interpreter_frame_last_sp_offset * wordSize);
879 if (JvmtiExport::can_post_interpreter_events()) {
880 Label run_compiled_code;
881 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
882 // compiled code in threads for which the event is enabled. Check here for
883 // interp_only_mode if these events CAN be enabled.
884 #ifndef OPT_THREAD
885 get_thread(temp);
886 #else
887 move(temp, TREG);
888 #endif
889 // interp_only is an int, on little endian it is sufficient to test the byte only
890 // Is a cmpl faster (ce
891 //cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
892 //jcc(Assembler::zero, run_compiled_code);
893 lw(AT, temp, in_bytes(JavaThread::interp_only_mode_offset()));
894 beq(AT, R0, run_compiled_code);
895 delayed()->nop();
896 //jmp(Address(method, methodOopDesc::interpreter_entry_offset()));
897 ld(AT, method, in_bytes(Method::interpreter_entry_offset()));
898 jr(AT);
899 delayed()->nop();
900 bind(run_compiled_code);
901 }
903 ld(AT, method, in_bytes(Method::from_interpreted_offset()));
904 jr(AT);
905 delayed()->nop();
906 }
909 // The following two routines provide a hook so that an implementation
910 // can schedule the dispatch in two parts. amd64 does not do this.
911 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
912 // Nothing amd64 specific to be done here
913 }
915 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
916 dispatch_next(state, step);
917 }
919 // assume the next bytecode in T8.
920 void InterpreterMacroAssembler::dispatch_base(TosState state,
921 address* table,
922 bool verifyoop) {
923 if (VerifyActivationFrameSize) {
924 Label L;
926 dsub(T2, FP, SP);
927 int min_frame_size = (frame::link_offset -
928 frame::interpreter_frame_initial_sp_offset) * wordSize;
929 daddi(T2, T2,- min_frame_size);
930 bgez(T2, L);
931 delayed()->nop();
932 stop("broken stack frame");
933 bind(L);
934 }
935 // FIXME: I do not know which register should pass to verify_oop
936 if (verifyoop) verify_oop(FSR, state);
937 dsll(T2, Rnext, LogBytesPerWord);
939 if((long)table >= (long)Interpreter::dispatch_table(btos) &&
940 (long)table <= (long)Interpreter::dispatch_table(vtos)
941 ) {
942 int table_size = (long)Interpreter::dispatch_table(ctos) - (long)Interpreter::dispatch_table(btos);
943 int table_offset = ((int)state - (int)itos) * table_size;
945 // 2013/12/17 Fu: GP points to the starting address of Interpreter::dispatch_table(itos).
946 // See StubGenerator::generate_call_stub(address& return_address) for the initialization of GP.
947 if(table_offset != 0) {
948 daddiu(T3, GP, table_offset);
949 gsldx(T3, T2, T3, 0); // 2013/5/7 Jin: Godson3 extension instruction
950 } else {
951 gsldx(T3, T2, GP, 0);
952 }
953 } else {
954 li(T3, (long)table);
955 gsldx(T3, T2, T3, 0);
956 }
958 jr(T3);
959 delayed()->nop();
960 }
962 void InterpreterMacroAssembler::dispatch_only(TosState state) {
963 dispatch_base(state, Interpreter::dispatch_table(state));
964 }
966 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
967 dispatch_base(state, Interpreter::normal_table(state));
968 }
970 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
971 dispatch_base(state, Interpreter::normal_table(state), false);
972 }
975 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
976 // load next bytecode (load before advancing r13 to prevent AGI)
977 lbu(Rnext, BCP, step);
978 increment(BCP, step);
979 dispatch_base(state, Interpreter::dispatch_table(state));
980 }
982 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
983 // load current bytecode
984 lbu(Rnext, BCP, 0);
985 dispatch_base(state, table);
986 }
988 // remove activation
989 //
990 // Unlock the receiver if this is a synchronized method.
991 // Unlock any Java monitors from syncronized blocks.
992 // Remove the activation from the stack.
993 //
994 // If there are locked Java monitors
995 // If throw_monitor_exception
996 // throws IllegalMonitorStateException
997 // Else if install_monitor_exception
998 // installs IllegalMonitorStateException
999 // Else
1000 // no error processing
1001 // used registers : T1, T2, T3, T8
1002 // T1 : thread, method access flags
1003 // T2 : monitor entry pointer
1004 // T3 : method, monitor top
1005 // T8 : unlock flag
1006 void InterpreterMacroAssembler::remove_activation(
1007 TosState state,
1008 Register ret_addr,
1009 bool throw_monitor_exception,
1010 bool install_monitor_exception,
1011 bool notify_jvmdi) {
1012 // Note: Registers V0, V1 and F0, F1 may be in use for the result
1013 // check if synchronized method
1014 Label unlocked, unlock, no_unlock;
1016 // get the value of _do_not_unlock_if_synchronized into T8
1017 #ifndef OPT_THREAD
1018 Register thread = T1;
1019 get_thread(thread);
1020 #else
1021 Register thread = TREG;
1022 #endif
1023 lb(T8, thread, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1024 // reset the flag
1025 sb(R0, thread, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1026 // get method access flags
1027 ld(T3, FP, frame::interpreter_frame_method_offset * wordSize);
1028 lw(T1, T3, in_bytes(Method::access_flags_offset()));
1029 andi(T1, T1, JVM_ACC_SYNCHRONIZED);
1030 beq(T1, R0, unlocked);
1031 delayed()->nop();
1033 // Don't unlock anything if the _do_not_unlock_if_synchronized flag is set.
1034 bne(T8, R0, no_unlock);
1035 delayed()->nop();
1036 // unlock monitor
1037 push(state); // save result
1039 // BasicObjectLock will be first in list,
1040 // since this is a synchronized method. However, need
1041 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
1042 daddiu(c_rarg0, FP, frame::interpreter_frame_initial_sp_offset * wordSize
1043 - (int)sizeof(BasicObjectLock));
1044 // address of first monitor
1045 lw(T1, c_rarg0, BasicObjectLock::obj_offset_in_bytes());
1046 bne(T1, R0, unlock);
1047 delayed()->nop();
1048 pop(state);
1049 if (throw_monitor_exception) {
1050 // Entry already unlocked, need to throw exception
1051 //I think mips do not need empty_FPU_stack
1052 // remove possible return value from FPU-stack, otherwise stack could overflow
1054 empty_FPU_stack();
1055 call_VM(NOREG, CAST_FROM_FN_PTR(address,
1056 InterpreterRuntime::throw_illegal_monitor_state_exception));
1057 should_not_reach_here();
1058 } else {
1059 // Monitor already unlocked during a stack unroll.
1060 // If requested, install an illegal_monitor_state_exception.
1061 // Continue with stack unrolling.
1062 if (install_monitor_exception) {
1063 // remove possible return value from FPU-stack,
1064 // otherwise stack could overflow
1065 empty_FPU_stack();
1066 call_VM(NOREG, CAST_FROM_FN_PTR(address,
1067 InterpreterRuntime::new_illegal_monitor_state_exception));
1069 }
1071 b(unlocked);
1072 delayed()->nop();
1073 }
1075 bind(unlock);
1077 unlock_object(c_rarg0);
1078 pop(state);
1079 // Check that for block-structured locking (i.e., that all locked objects has been unlocked)
1080 bind(unlocked);
1082 // V0, V1: Might contain return value
1084 // Check that all monitors are unlocked
1085 {
1086 Label loop, exception, entry, restart;
1087 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
1088 const Address monitor_block_top(FP,
1089 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1091 bind(restart);
1092 // points to current entry, starting with top-most entry (ecx)
1093 ld(c_rarg0, monitor_block_top);
1094 // points to word before bottom of monitor block (ebx)
1095 daddiu(T3, FP, frame::interpreter_frame_initial_sp_offset * wordSize);
1096 // lw(AT, R0, 12);
1097 b(entry);
1098 delayed()->nop();
1100 // Entry already locked, need to throw exception
1101 bind(exception);
1103 if (throw_monitor_exception) {
1104 // Throw exception
1105 // remove possible return value from FPU-stack,
1106 // otherwise stack could overflow
1107 empty_FPU_stack();
1108 MacroAssembler::call_VM(NOREG, CAST_FROM_FN_PTR(address,
1109 InterpreterRuntime::throw_illegal_monitor_state_exception));
1110 should_not_reach_here();
1111 } else {
1112 // Stack unrolling. Unlock object and install illegal_monitor_exception
1113 // Unlock does not block, so don't have to worry about the frame
1114 // We don't have to preserve eax, edx since we are going to
1115 // throw an exception
1116 unlock_object(c_rarg0);
1117 if (install_monitor_exception) {
1118 empty_FPU_stack();
1119 call_VM(NOREG, CAST_FROM_FN_PTR(address,
1120 InterpreterRuntime::new_illegal_monitor_state_exception));
1121 }
1123 b(restart);
1124 delayed()->nop();
1125 }
1127 bind(loop);
1128 // stop("before object excetpion");
1130 ld(T1, c_rarg0, BasicObjectLock::obj_offset_in_bytes());
1131 bne(T1, R0, exception);// check if current entry is used
1132 delayed()->nop();
1135 daddiu(c_rarg0, c_rarg0, entry_size);// otherwise advance to next entry
1136 bind(entry);
1137 bne(c_rarg0, T3, loop); // check if bottom reached
1138 delayed()->nop(); // if not at bottom then check this entry
1139 }
1141 bind(no_unlock);
1143 // jvmpi support (jvmdi does not generate MethodExit on exception / popFrame)
1144 if (notify_jvmdi) {
1145 //notify_method_exit(state); // preserve TOSCA
1146 notify_method_exit(false,state,NotifyJVMTI); // preserve TOSCA
1147 } else {
1148 // notify_jvmpi_method_exit(state); // preserve TOSCA
1149 notify_method_exit(false,state,SkipNotifyJVMTI);// preserve TOSCA
1150 }
1152 // remove activation
1153 ld(SP, FP, frame::interpreter_frame_sender_sp_offset * wordSize);
1154 ld(ret_addr, FP, frame::interpreter_frame_return_addr_offset * wordSize);
1155 ld(FP, FP, frame::interpreter_frame_sender_fp_offset * wordSize);
1156 }
1158 #endif // C_INTERP
1160 // Lock object
1161 //
1162 // Args:
1163 // c_rarg1: BasicObjectLock to be used for locking
1164 //
1165 // Kills:
1166 // rax
1167 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs)
1168 // rscratch1, rscratch2 (scratch regs)
1169 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1170 assert(lock_reg == c_rarg0, "The argument is only for looks. It must be c_rarg0");
1172 if (UseHeavyMonitors) {
1173 call_VM(NOREG, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1174 lock_reg);
1175 } else {
1177 Label done;
1179 const Register swap_reg = T2; // Must use eax for cmpxchg instruction
1180 const Register obj_reg = T1; // Will contain the oop
1182 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1183 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1184 const int mark_offset = lock_offset
1185 + BasicLock::displaced_header_offset_in_bytes();
1187 Label slow_case;
1188 // Load object pointer into obj_reg %ecx
1189 ld(obj_reg, lock_reg, obj_offset);
1190 if (UseBiasedLocking) {
1191 // Note: we use noreg for the temporary register since it's hard
1192 // to come up with a free register on all incoming code paths
1193 biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false,
1194 done, &slow_case);
1195 }
1198 // Load (object->mark() | 1) into swap_reg %eax
1199 ld(AT, obj_reg, 0);
1200 ori(swap_reg, AT, 1);
1203 // Save (object->mark() | 1) into BasicLock's displaced header
1204 sd(swap_reg, lock_reg, mark_offset);
1206 assert(lock_offset == 0, "displached header must be first word in BasicObjectLock");
1207 if (os::is_MP()) {
1208 // lock();
1209 }
1210 cmpxchg(lock_reg, Address(obj_reg, 0), swap_reg);
1212 if (PrintBiasedLockingStatistics) {
1213 //cond_incl(AT, Address((int) BiasedLocking::fast_path_entry_count_addr(), relocInfo::none));
1214 }
1216 bne(AT, R0, done);
1218 // Test if the oopMark is an obvious stack pointer, i.e.,
1219 // 1) (mark & 3) == 0, and
1220 // 2) SP <= mark < SP + os::pagesize()
1221 //
1222 // These 3 tests can be done by evaluating the following
1223 // expression: ((mark - esp) & (3 - os::vm_page_size())),
1224 // assuming both stack pointer and pagesize have their
1225 // least significant 2 bits clear.
1226 // NOTE: the oopMark is in swap_reg %eax as the result of cmpxchg
1227 delayed()->nop();
1229 dsub(swap_reg, swap_reg, SP);
1230 move(AT, 3 - os::vm_page_size());
1231 andr(swap_reg, swap_reg, AT);
1232 // Save the test result, for recursive case, the result is zero
1233 sd(swap_reg, lock_reg, mark_offset);
1234 if (PrintBiasedLockingStatistics) {
1235 // cond_incl(AT, Address((int) BiasedLocking::fast_path_entry_count_addr(), relocInfo::none));
1236 }
1238 beq(swap_reg, R0, done);
1239 delayed()->nop();
1240 bind(slow_case);
1241 // Call the runtime routine for slow case
1242 call_VM(NOREG, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
1244 bind(done);
1245 }
1246 }
1249 // Unlocks an object. Used in monitorexit bytecode and
1250 // remove_activation. Throws an IllegalMonitorException if object is
1251 // not locked by current thread.
1252 //
1253 // Args:
1254 // c_rarg1: BasicObjectLock for lock
1255 //
1256 // Kills:
1257 // rax
1258 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1259 // rscratch1, rscratch2 (scratch regs)
1260 // Argument: T6 : Points to BasicObjectLock structure for lock
1261 // Argument: c_rarg0 : Points to BasicObjectLock structure for lock
1262 // Throw an IllegalMonitorException if object is not locked by current thread
1263 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1264 assert(lock_reg == c_rarg0, "The argument is only for looks. It must be c_rarg0");
1266 if (UseHeavyMonitors) {
1267 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1268 } else {
1269 Label done;
1271 const Register swap_reg = T2; // Must use eax for cmpxchg instruction
1272 const Register header_reg = T3; // Will contain the old oopMark
1273 const Register obj_reg = T1; // Will contain the oop
1275 save_bcp(); // Save in case of exception
1277 // Convert from BasicObjectLock structure to object and BasicLock structure
1278 // Store the BasicLock address into %eax
1279 daddi(swap_reg, lock_reg, BasicObjectLock::lock_offset_in_bytes());
1281 // Load oop into obj_reg(%ecx)
1282 ld(obj_reg, lock_reg, BasicObjectLock::obj_offset_in_bytes ());
1283 //free entry
1284 sd(R0, lock_reg, BasicObjectLock::obj_offset_in_bytes());
1285 if (UseBiasedLocking) {
1286 biased_locking_exit(obj_reg, header_reg, done);
1287 }
1289 // Load the old header from BasicLock structure
1290 ld(header_reg, swap_reg, BasicLock::displaced_header_offset_in_bytes());
1291 /*
1292 // Free entry
1293 sw(R0, lock_reg, BasicObjectLock::obj_offset_in_bytes());
1294 */
1295 // zero for recursive case
1296 beq(header_reg, R0, done);
1297 delayed()->nop();
1299 // Atomic swap back the old header
1300 if (os::is_MP()); //lock();
1301 cmpxchg(header_reg, Address(obj_reg, 0), swap_reg);
1303 // zero for recursive case
1304 bne(AT, R0, done);
1305 delayed()->nop();
1307 // Call the runtime routine for slow case.
1308 sd(obj_reg, lock_reg, BasicObjectLock::obj_offset_in_bytes()); // restore obj
1309 call_VM(NOREG, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1310 lock_reg);
1312 bind(done);
1314 restore_bcp();
1315 }
1316 }
1318 #ifndef CC_INTERP
1320 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1321 Label& zero_continue) {
1322 assert(ProfileInterpreter, "must be profiling interpreter");
1323 ld(mdp, Address(FP, frame::interpreter_frame_mdx_offset * wordSize));
1324 beq(mdp, R0, zero_continue);
1325 delayed()->nop();
1326 }
1329 // Set the method data pointer for the current bcp.
1330 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1331 assert(ProfileInterpreter, "must be profiling interpreter");
1332 Label set_mdp;
1334 // V0 and T0 will be used as two temporary registers.
1335 sd(V0, SP, (-1) * wordSize);
1336 sd(T0, SP, (-2) * wordSize);
1337 daddiu(SP, SP, (-2) * wordSize);
1339 get_method(T0);
1340 // Test MDO to avoid the call if it is NULL.
1341 ld(V0, T0, in_bytes(Method::method_data_offset()));
1342 beq(V0, R0, set_mdp);
1343 delayed()->nop();
1345 // method: T0
1346 // bcp: BCP --> S0
1347 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), T0, BCP);
1348 // mdi: V0
1349 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1350 /* Jin: reload T0 */
1351 get_method(T0);
1352 ld(T0, T0, in_bytes(Method::method_data_offset()));
1353 daddiu(T0, T0, in_bytes(MethodData::data_offset()));
1354 daddu(V0, T0, V0);
1356 bind(set_mdp);
1358 sd(V0, FP, frame::interpreter_frame_mdx_offset * wordSize);
1360 daddiu(SP, SP, 2 * wordSize);
1361 ld(V0, SP, (-1) * wordSize);
1362 ld(T0, SP, (-2) * wordSize);
1363 }
1365 void InterpreterMacroAssembler::verify_method_data_pointer() {
1366 assert(ProfileInterpreter, "must be profiling interpreter");
1367 #ifdef ASSERT
1368 Label verify_continue;
1369 Register method = V0;
1370 Register mdp = V1;
1371 Register tmp = A0;
1372 push(method);
1373 push(mdp);
1374 push(tmp);
1375 test_method_data_pointer(mdp, verify_continue); // If mdp is zero, continue
1376 get_method(method);
1378 // If the mdp is valid, it will point to a DataLayout header which is
1379 // consistent with the bcp. The converse is highly probable also.
1380 lhu(tmp, mdp, in_bytes(DataLayout::bci_offset()));
1381 ld(AT, method, in_bytes(Method::const_offset()));
1382 daddu(tmp, tmp, AT);
1383 daddiu(tmp, tmp, in_bytes(ConstMethod::codes_offset()));
1384 beq(tmp, BCP, verify_continue);
1385 nop();
1386 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), method, BCP, mdp);
1387 bind(verify_continue);
1388 pop(tmp);
1389 pop(mdp);
1390 pop(method);
1391 #endif // ASSERT
1392 }
1395 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1396 int constant,
1397 Register value) {
1398 assert(ProfileInterpreter, "must be profiling interpreter");
1399 Address data(mdp_in, constant);
1400 sd(value, data);
1401 }
1404 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1405 int constant,
1406 bool decrement) {
1407 // Counter address
1408 Address data(mdp_in, constant);
1410 increment_mdp_data_at(data, decrement);
1411 }
1413 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1414 bool decrement) {
1415 assert(ProfileInterpreter, "must be profiling interpreter");
1416 // %%% this does 64bit counters at best it is wasting space
1417 // at worst it is a rare bug when counters overflow
1418 Register tmp = S0;
1419 push(tmp);
1420 if (decrement) {
1421 // Decrement the register.
1422 ld(AT, data);
1423 daddiu(tmp, AT, (int32_t) -DataLayout::counter_increment);
1424 // If the decrement causes the counter to overflow, stay negative
1425 Label L;
1426 slt(AT, tmp, R0);
1427 bne(AT, R0, L);
1428 nop();
1429 daddi(tmp, tmp, (int32_t) DataLayout::counter_increment);
1430 bind(L);
1431 sd(tmp, data);
1432 } else {
1433 assert(DataLayout::counter_increment == 1,
1434 "flow-free idiom only works with 1");
1435 ld(AT, data);
1436 // Increment the register.
1437 daddiu(tmp, AT, DataLayout::counter_increment);
1438 // If the increment causes the counter to overflow, pull back by 1.
1439 slt(AT, tmp, R0);
1440 dsubu(tmp, tmp, AT);
1441 sd(tmp, data);
1442 }
1443 pop(tmp);
1444 }
1447 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1448 Register reg,
1449 int constant,
1450 bool decrement) {
1451 Register tmp = S0;
1452 push(S0);
1453 if (decrement) {
1454 // Decrement the register.
1455 daddu(AT, mdp_in, reg);
1456 assert(Assembler::is_simm16(constant), "constant is not a simm16 !");
1457 ld(AT, AT, constant);
1459 daddiu(tmp, AT, (int32_t) -DataLayout::counter_increment);
1460 // If the decrement causes the counter to overflow, stay negative
1461 Label L;
1462 slt(AT, tmp, R0);
1463 bne(AT, R0, L);
1464 nop();
1465 daddi(tmp, tmp, (int32_t) DataLayout::counter_increment);
1466 bind(L);
1468 daddu(AT, mdp_in, reg);
1469 sd(tmp, AT, constant);
1470 } else {
1471 daddu(AT, mdp_in, reg);
1472 assert(Assembler::is_simm16(constant), "constant is not a simm16 !");
1473 ld(AT, AT, constant);
1475 // Increment the register.
1476 daddiu(tmp, AT, DataLayout::counter_increment);
1477 // If the increment causes the counter to overflow, pull back by 1.
1478 slt(AT, tmp, R0);
1479 dsubu(tmp, tmp, AT);
1481 daddu(AT, mdp_in, reg);
1482 sd(tmp, AT, constant);
1483 }
1484 pop(S0);
1485 }
1487 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1488 int flag_byte_constant) {
1489 assert(ProfileInterpreter, "must be profiling interpreter");
1490 int header_offset = in_bytes(DataLayout::header_offset());
1491 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
1492 // Set the flag
1493 lw(AT, Address(mdp_in, header_offset));
1494 if(Assembler::is_simm16(header_bits)) {
1495 ori(AT, AT, header_bits);
1496 } else {
1497 push(T8);
1498 // T8 is used as a temporary register.
1499 move(T8, header_bits);
1500 orr(AT, AT, T8);
1501 pop(T8);
1502 }
1503 sw(AT, Address(mdp_in, header_offset));
1504 }
1508 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1509 int offset,
1510 Register value,
1511 Register test_value_out,
1512 Label& not_equal_continue) {
1513 assert(ProfileInterpreter, "must be profiling interpreter");
1514 if (test_value_out == noreg) {
1515 ld(AT, Address(mdp_in, offset));
1516 bne(AT, value, not_equal_continue);
1517 nop();
1518 } else {
1519 // Put the test value into a register, so caller can use it:
1520 ld(test_value_out, Address(mdp_in, offset));
1521 bne(value, test_value_out, not_equal_continue);
1522 nop();
1523 }
1524 }
1527 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1528 int offset_of_disp) {
1529 assert(ProfileInterpreter, "must be profiling interpreter");
1530 assert(Assembler::is_simm16(offset_of_disp), "offset is not an simm16");
1531 ld(AT, mdp_in, offset_of_disp);
1532 daddu(mdp_in, mdp_in, AT);
1533 sd(mdp_in, Address(FP, frame::interpreter_frame_mdx_offset * wordSize));
1534 }
1537 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1538 Register reg,
1539 int offset_of_disp) {
1540 assert(ProfileInterpreter, "must be profiling interpreter");
1541 // Attention: Until now (20121217), we do not support this kind of addressing on Loongson.
1542 // Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1543 daddu(AT, reg, mdp_in);
1544 assert(Assembler::is_simm16(offset_of_disp), "offset is not an simm16");
1545 ld(AT, AT, offset_of_disp);
1546 daddu(mdp_in, mdp_in, AT);
1547 sd(mdp_in, Address(FP, frame::interpreter_frame_mdx_offset * wordSize));
1548 }
1551 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1552 int constant) {
1553 assert(ProfileInterpreter, "must be profiling interpreter");
1554 if(Assembler::is_simm16(constant)) {
1555 daddiu(mdp_in, mdp_in, constant);
1556 } else {
1557 move(AT, constant);
1558 daddu(mdp_in, mdp_in, AT);
1559 }
1560 sd(mdp_in, Address(FP, frame::interpreter_frame_mdx_offset * wordSize));
1561 }
1564 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1565 assert(ProfileInterpreter, "must be profiling interpreter");
1566 push(return_bci); // save/restore across call_VM
1567 call_VM(noreg,
1568 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1569 return_bci);
1570 pop(return_bci);
1571 }
1574 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1575 Register bumped_count) {
1576 if (ProfileInterpreter) {
1577 Label profile_continue;
1579 // If no method data exists, go to profile_continue.
1580 // Otherwise, assign to mdp
1581 test_method_data_pointer(mdp, profile_continue);
1583 // We are taking a branch. Increment the taken count.
1584 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1585 // We inline increment_mdp_data_at to return bumped_count in a register
1586 ld(bumped_count, mdp, in_bytes(JumpData::taken_offset()));
1587 assert(DataLayout::counter_increment == 1,
1588 "flow-free idiom only works with 1");
1589 push(T8);
1590 // T8 is used as a temporary register.
1591 daddiu(T8, bumped_count, DataLayout::counter_increment);
1592 slt(AT, T8, R0);
1593 dsubu(bumped_count, T8, AT);
1594 pop(T8);
1595 sd(bumped_count, mdp, in_bytes(JumpData::taken_offset())); // Store back out
1596 // The method data pointer needs to be updated to reflect the new target.
1597 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1598 bind(profile_continue);
1599 }
1600 }
1603 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1604 if (ProfileInterpreter) {
1605 Label profile_continue;
1607 // If no method data exists, go to profile_continue.
1608 test_method_data_pointer(mdp, profile_continue);
1610 // We are taking a branch. Increment the not taken count.
1611 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1613 // The method data pointer needs to be updated to correspond to
1614 // the next bytecode
1615 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1616 bind(profile_continue);
1617 }
1618 }
1621 void InterpreterMacroAssembler::profile_call(Register mdp) {
1622 if (ProfileInterpreter) {
1623 Label profile_continue;
1625 // If no method data exists, go to profile_continue.
1626 test_method_data_pointer(mdp, profile_continue);
1628 // We are making a call. Increment the count.
1629 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1631 // The method data pointer needs to be updated to reflect the new target.
1632 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1633 bind(profile_continue);
1634 }
1635 }
1638 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1639 if (ProfileInterpreter) {
1640 Label profile_continue;
1642 // If no method data exists, go to profile_continue.
1643 test_method_data_pointer(mdp, profile_continue);
1644 // We are making a call. Increment the count.
1645 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1647 // The method data pointer needs to be updated to reflect the new target.
1648 update_mdp_by_constant(mdp, in_bytes(VirtualCallData:: virtual_call_data_size()));
1649 bind(profile_continue);
1650 }
1651 }
1654 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1655 Register mdp,
1656 Register reg2,
1657 bool receiver_can_be_null) {
1658 if (ProfileInterpreter) {
1659 Label profile_continue;
1661 // If no method data exists, go to profile_continue.
1662 test_method_data_pointer(mdp, profile_continue);
1664 Label skip_receiver_profile;
1665 if (receiver_can_be_null) {
1666 Label not_null;
1667 bne(receiver, R0, not_null);
1668 nop();
1669 // We are making a call. Increment the count.
1670 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1671 beq(R0, R0, skip_receiver_profile);
1672 nop();
1673 bind(not_null);
1674 }
1676 // Record the receiver type.
1677 record_klass_in_profile(receiver, mdp, reg2, true);
1678 bind(skip_receiver_profile);
1680 // The method data pointer needs to be updated to reflect the new target.
1681 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1682 bind(profile_continue);
1683 }
1684 }
1686 void InterpreterMacroAssembler::profile_checkcast(bool is_null, Register mdp) {
1687 // In x86, this method does not exist.
1688 #ifndef CORE
1689 if (ProfileInterpreter) {
1690 Label profile_continue;
1692 // If no method data exists, go to profile_continue.
1693 test_method_data_pointer(mdp, profile_continue);
1695 if (is_null) // Set the flag to true.
1696 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1697 //set_mdp_flag_at(mdp, BitData::null_flag_constant());
1699 // The method data pointer needs to be updated.
1700 update_mdp_by_constant(mdp, in_bytes(BitData::bit_data_size()));
1702 bind (profile_continue);
1703 }
1704 #endif // !CORE
1705 }
1707 // This routine creates a state machine for updating the multi-row
1708 // type profile at a virtual call site (or other type-sensitive bytecode).
1709 // The machine visits each row (of receiver/count) until the receiver type
1710 // is found, or until it runs out of rows. At the same time, it remembers
1711 // the location of the first empty row. (An empty row records null for its
1712 // receiver, and can be allocated for a newly-observed receiver type.)
1713 // Because there are two degrees of freedom in the state, a simple linear
1714 // search will not work; it must be a decision tree. Hence this helper
1715 // function is recursive, to generate the required tree structured code.
1716 // It's the interpreter, so we are trading off code space for speed.
1717 // See below for example code.
1718 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1719 Register receiver, Register mdp,
1720 Register reg2,
1721 int start_row, Label& done, bool is_virtual_call) {
1722 if (TypeProfileWidth == 0) {
1723 if (is_virtual_call) {
1724 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1725 }
1726 return;
1727 }
1729 int last_row = VirtualCallData::row_limit() - 1;
1730 assert(start_row <= last_row, "must be work left to do");
1731 // Test this row for both the receiver and for null.
1732 // Take any of three different outcomes:
1733 // 1. found receiver => increment count and goto done
1734 // 2. found null => keep looking for case 1, maybe allocate this cell
1735 // 3. found something else => keep looking for cases 1 and 2
1736 // Case 3 is handled by a recursive call.
1737 for (int row = start_row; row <= last_row; row++) {
1738 Label next_test;
1739 bool test_for_null_also = (row == start_row);
1741 // See if the receiver is receiver[n].
1742 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1743 test_mdp_data_at(mdp, recvr_offset, receiver,
1744 (test_for_null_also ? reg2 : noreg),
1745 next_test);
1746 // (Reg2 now contains the receiver from the CallData.)
1748 // The receiver is receiver[n]. Increment count[n].
1749 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1750 increment_mdp_data_at(mdp, count_offset);
1751 beq(R0, R0, done);
1752 nop();
1753 bind(next_test);
1755 if (test_for_null_also) {
1756 Label found_null;
1757 // Failed the equality check on receiver[n]... Test for null.
1758 if (start_row == last_row) {
1759 // The only thing left to do is handle the null case.
1760 if (is_virtual_call) {
1761 beq(reg2, R0, found_null);
1762 nop();
1763 // Receiver did not match any saved receiver and there is no empty row for it.
1764 // Increment total counter to indicate polymorphic case.
1765 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1766 beq(R0, R0, done);
1767 nop();
1768 bind(found_null);
1769 } else {
1770 bne(reg2, R0, done);
1771 nop();
1772 }
1773 break;
1774 }
1775 // Since null is rare, make it be the branch-taken case.
1776 beq(reg2, R0, found_null);
1777 nop();
1779 // Put all the "Case 3" tests here.
1780 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
1782 // Found a null. Keep searching for a matching receiver,
1783 // but remember that this is an empty (unused) slot.
1784 bind(found_null);
1785 }
1786 }
1788 // In the fall-through case, we found no matching receiver, but we
1789 // observed the receiver[start_row] is NULL.
1791 // Fill in the receiver field and increment the count.
1792 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1793 set_mdp_data_at(mdp, recvr_offset, receiver);
1794 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1795 move(reg2, DataLayout::counter_increment);
1796 set_mdp_data_at(mdp, count_offset, reg2);
1797 if (start_row > 0) {
1798 beq(R0, R0, done);
1799 nop();
1800 }
1801 }
1803 // Example state machine code for three profile rows:
1804 // // main copy of decision tree, rooted at row[1]
1805 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1806 // if (row[0].rec != NULL) {
1807 // // inner copy of decision tree, rooted at row[1]
1808 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1809 // if (row[1].rec != NULL) {
1810 // // degenerate decision tree, rooted at row[2]
1811 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1812 // if (row[2].rec != NULL) { goto done; } // overflow
1813 // row[2].init(rec); goto done;
1814 // } else {
1815 // // remember row[1] is empty
1816 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1817 // row[1].init(rec); goto done;
1818 // }
1819 // } else {
1820 // // remember row[0] is empty
1821 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1822 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1823 // row[0].init(rec); goto done;
1824 // }
1826 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1827 Register mdp,
1828 Register reg2, bool is_virtual_call) {
1829 assert(ProfileInterpreter, "must be profiling");
1830 Label done;
1832 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1834 bind (done);
1835 }
1837 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1838 Register mdp) {
1839 if (ProfileInterpreter) {
1840 Label profile_continue;
1841 uint row;
1843 // If no method data exists, go to profile_continue.
1844 test_method_data_pointer(mdp, profile_continue);
1846 // Update the total ret count.
1847 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1849 for (row = 0; row < RetData::row_limit(); row++) {
1850 Label next_test;
1852 // See if return_bci is equal to bci[n]:
1853 test_mdp_data_at(mdp,
1854 in_bytes(RetData::bci_offset(row)),
1855 return_bci, noreg,
1856 next_test);
1858 // return_bci is equal to bci[n]. Increment the count.
1859 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1861 // The method data pointer needs to be updated to reflect the new target.
1862 update_mdp_by_offset(mdp,
1863 in_bytes(RetData::bci_displacement_offset(row)));
1864 beq(R0, R0, profile_continue);
1865 nop();
1866 bind(next_test);
1867 }
1869 update_mdp_for_ret(return_bci);
1871 bind(profile_continue);
1872 }
1873 }
1876 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1877 if (ProfileInterpreter) {
1878 Label profile_continue;
1880 // If no method data exists, go to profile_continue.
1881 test_method_data_pointer(mdp, profile_continue);
1883 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1885 // The method data pointer needs to be updated.
1886 int mdp_delta = in_bytes(BitData::bit_data_size());
1887 if (TypeProfileCasts) {
1888 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1889 }
1890 update_mdp_by_constant(mdp, mdp_delta);
1892 bind(profile_continue);
1893 }
1894 }
1897 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1898 if (ProfileInterpreter && TypeProfileCasts) {
1899 Label profile_continue;
1901 // If no method data exists, go to profile_continue.
1902 test_method_data_pointer(mdp, profile_continue);
1904 int count_offset = in_bytes(CounterData::count_offset());
1905 // Back up the address, since we have already bumped the mdp.
1906 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1908 // *Decrement* the counter. We expect to see zero or small negatives.
1909 increment_mdp_data_at(mdp, count_offset, true);
1911 bind (profile_continue);
1912 }
1913 }
1916 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1917 if (ProfileInterpreter) {
1918 Label profile_continue;
1920 // If no method data exists, go to profile_continue.
1921 test_method_data_pointer(mdp, profile_continue);
1923 // The method data pointer needs to be updated.
1924 int mdp_delta = in_bytes(BitData::bit_data_size());
1925 if (TypeProfileCasts) {
1927 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1929 // Record the object type.
1930 record_klass_in_profile(klass, mdp, reg2, false);
1931 }
1932 update_mdp_by_constant(mdp, mdp_delta);
1934 bind(profile_continue);
1935 }
1936 }
1939 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1940 if (ProfileInterpreter) {
1941 Label profile_continue;
1943 // If no method data exists, go to profile_continue.
1944 test_method_data_pointer(mdp, profile_continue);
1946 // Update the default case count
1947 increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset()));
1949 // The method data pointer needs to be updated.
1950 update_mdp_by_offset(mdp, in_bytes(MultiBranchData:: default_displacement_offset()));
1952 bind(profile_continue);
1953 }
1954 }
1957 void InterpreterMacroAssembler::profile_switch_case(Register index,
1958 Register mdp,
1959 Register reg2) {
1960 if (ProfileInterpreter) {
1961 Label profile_continue;
1963 // If no method data exists, go to profile_continue.
1964 test_method_data_pointer(mdp, profile_continue);
1966 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
1967 move(reg2, in_bytes(MultiBranchData::per_case_size()));
1968 dmult(index, reg2);
1969 mflo(index);
1970 // addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1971 daddiu(index, index, in_bytes(MultiBranchData::case_array_offset()));
1973 // Update the case count
1974 increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset()));
1976 // The method data pointer needs to be updated.
1977 update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData:: relative_displacement_offset()));
1979 bind(profile_continue);
1980 }
1981 }
1983 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
1984 Label update, next, none;
1986 verify_oop(obj);
1988 //testptr(obj, obj);
1989 //jccb(Assembler::notZero, update);
1990 bne(obj, R0, update);
1991 nop();
1993 //orptr(mdo_addr, TypeEntries::null_seen);
1994 push(T1);
1995 if (mdo_addr.index() == noreg) {
1996 ld(T1, mdo_addr);
1997 } else {
1998 guarantee(T1 != mdo_addr.base(), "The base register will be corrupted !");
1999 guarantee(T1 != mdo_addr.index(), "The index register will be corrupted !");
2001 dsll(AT, mdo_addr.index(), mdo_addr.scale());
2002 daddu(AT, AT, mdo_addr.base());
2003 ld(T1, AT, mdo_addr.disp());
2004 }
2005 li(AT, TypeEntries::null_seen);
2006 orr(AT, T1, AT);
2007 if (mdo_addr.index() == noreg) {
2008 sd(AT, mdo_addr);
2009 } else {
2010 guarantee(T1 != mdo_addr.base(), "The base register will be corrupted !");
2011 guarantee(T1 != mdo_addr.index(), "The index register will be corrupted !");
2013 dsll(T1, mdo_addr.index(), mdo_addr.scale());
2014 daddu(T1, T1, mdo_addr.base());
2015 sd(AT, T1, mdo_addr.disp());
2016 }
2017 pop(T1);
2019 //jmpb(next);
2020 beq(R0, R0, next);
2021 nop();
2023 bind(update);
2024 load_klass(obj, obj);
2026 //xorptr(obj, mdo_addr);
2027 if (mdo_addr.index() == noreg) {
2028 ld(AT, mdo_addr);
2029 } else {
2030 dsll(AT, mdo_addr.index(), mdo_addr.scale());
2031 daddu(AT, AT, mdo_addr.base());
2032 ld(AT, AT, mdo_addr.disp());
2033 }
2034 xorr(obj, obj, AT);
2036 //testptr(obj, TypeEntries::type_klass_mask);
2037 //jccb(Assembler::zero, next); // klass seen before, nothing to
2038 // do. The unknown bit may have been
2039 // set already but no need to check.
2040 li(AT, TypeEntries::type_klass_mask);
2041 andr(AT, obj, AT);
2042 beq(AT, R0, next);
2043 nop();
2045 //testptr(obj, TypeEntries::type_unknown);
2046 //jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
2047 li(AT, TypeEntries::type_unknown);
2048 andr(AT, AT, obj);
2049 bne(AT, R0, next);
2050 nop();
2052 //cmpptr(mdo_addr, 0);
2053 //jccb(Assembler::equal, none);
2054 if (mdo_addr.index() == noreg) {
2055 ld(AT, mdo_addr);
2056 } else {
2057 dsll(AT, mdo_addr.index(), mdo_addr.scale());
2058 daddu(AT, AT, mdo_addr.base());
2059 ld(AT, AT, mdo_addr.disp());
2060 }
2061 beq(AT, R0, none);
2062 nop();
2065 //cmpptr(mdo_addr, TypeEntries::null_seen);
2066 //jccb(Assembler::equal, none);
2067 push(T1);
2068 if (mdo_addr.index() == noreg) {
2069 ld(T1, mdo_addr);
2070 } else {
2071 guarantee(T1 != mdo_addr.base(), "The base register will be corrupted !");
2072 guarantee(T1 != mdo_addr.index(), "The index register will be corrupted !");
2074 dsll(AT, mdo_addr.index(), mdo_addr.scale());
2075 daddu(AT, AT, mdo_addr.base());
2076 ld(T1, AT, mdo_addr.disp());
2077 }
2078 li(AT, TypeEntries::null_seen);
2079 subu(AT, AT, T1);
2080 pop(T1);
2081 beq(AT, R0, none);
2082 nop();
2084 // There is a chance that the checks above (re-reading profiling
2085 // data from memory) fail if another thread has just set the
2086 // profiling to this obj's klass
2087 //xorptr(obj, mdo_addr);
2088 //testptr(obj, TypeEntries::type_klass_mask);
2089 //jccb(Assembler::zero, next);
2090 if (mdo_addr.index() == noreg) {
2091 ld(AT, mdo_addr);
2092 } else {
2093 dsll(AT, mdo_addr.index(), mdo_addr.scale());
2094 daddu(AT, AT, mdo_addr.base());
2095 ld(AT, AT, mdo_addr.disp());
2096 }
2097 xorr(obj, obj, AT);
2098 li(AT, TypeEntries::type_klass_mask);
2099 andr(AT, obj, AT);
2100 beq(AT, R0, next);
2101 nop();
2103 // different than before. Cannot keep accurate profile.
2104 //orptr(mdo_addr, TypeEntries::type_unknown);
2105 //jmpb(next);
2106 push(T1);
2107 if (mdo_addr.index() == noreg) {
2108 ld(T1, mdo_addr);
2109 } else {
2110 guarantee(T1 != mdo_addr.base(), "The base register will be corrupted !");
2111 guarantee(T1 != mdo_addr.index(), "The index register will be corrupted !");
2113 dsll(AT, mdo_addr.index(), mdo_addr.scale());
2114 daddu(AT, AT, mdo_addr.base());
2115 ld(T1, AT, mdo_addr.disp());
2116 }
2117 li(AT, TypeEntries::type_unknown);
2118 orr(AT, T1, AT);
2119 if (mdo_addr.index() == noreg) {
2120 sd(AT, mdo_addr);
2121 } else {
2122 guarantee(T1 != mdo_addr.base(), "The base register will be corrupted !");
2123 guarantee(T1 != mdo_addr.index(), "The index register will be corrupted !");
2125 dsll(T1, mdo_addr.index(), mdo_addr.scale());
2126 daddu(T1, T1, mdo_addr.base());
2127 sd(AT, T1, mdo_addr.disp());
2128 }
2129 pop(T1);
2130 beq(R0, R0, next);
2131 nop();
2134 bind(none);
2135 // first time here. Set profile type.
2136 //movptr(mdo_addr, obj);
2137 if (mdo_addr.index() == noreg) {
2138 sd(obj, mdo_addr);
2139 } else {
2140 dsll(AT, mdo_addr.index(), mdo_addr.scale());
2141 daddu(AT, AT, mdo_addr.base());
2142 sd(obj, AT, mdo_addr.disp());
2143 }
2145 bind(next);
2146 }
2148 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
2149 if (!ProfileInterpreter) {
2150 return;
2151 }
2153 if (MethodData::profile_arguments() || MethodData::profile_return()) {
2154 Label profile_continue;
2156 test_method_data_pointer(mdp, profile_continue);
2158 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
2160 //cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
2161 //jcc(Assembler::notEqual, profile_continue);
2162 lb(AT, mdp, in_bytes(DataLayout::tag_offset()) - off_to_start);
2163 li(tmp, is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
2164 bne(tmp, AT, profile_continue);
2165 nop();
2168 if (MethodData::profile_arguments()) {
2169 Label done;
2170 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
2171 //addptr(mdp, off_to_args);
2172 if (Assembler::is_simm16(off_to_args)) {
2173 daddiu(mdp, mdp, off_to_args);
2174 } else {
2175 move(AT, off_to_args);
2176 daddu(mdp, mdp, AT);
2177 }
2180 for (int i = 0; i < TypeProfileArgsLimit; i++) {
2181 if (i > 0 || MethodData::profile_return()) {
2182 // If return value type is profiled we may have no argument to profile
2183 //movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
2184 ld(tmp, mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args);
2186 //subl(tmp, i*TypeStackSlotEntries::per_arg_count());
2187 if (Assembler::is_simm16(-1 * i * TypeStackSlotEntries::per_arg_count())) {
2188 addiu32(tmp, tmp, -1 * i * TypeStackSlotEntries::per_arg_count());
2189 } else {
2190 li(AT, i*TypeStackSlotEntries::per_arg_count());
2191 subu32(tmp, tmp, AT);
2192 }
2194 //cmpl(tmp, TypeStackSlotEntries::per_arg_count());
2195 //jcc(Assembler::less, done);
2196 li(AT, TypeStackSlotEntries::per_arg_count());
2197 slt(AT, tmp, AT);
2198 bne(AT, R0, done);
2199 nop();
2200 }
2201 //movptr(tmp, Address(callee, Method::const_offset()));
2202 ld(tmp, callee, in_bytes(Method::const_offset()));
2204 //load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
2205 lhu(tmp, tmp, in_bytes(ConstMethod::size_of_parameters_offset()));
2207 // stack offset o (zero based) from the start of the argument
2208 // list, for n arguments translates into offset n - o - 1 from
2209 // the end of the argument list
2210 //subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
2211 ld(AT, mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args);
2212 subu(tmp, tmp, AT);
2214 //subl(tmp, 1);
2215 addiu32(tmp, tmp, -1);
2217 Address arg_addr = argument_address(tmp);
2218 //movptr(tmp, arg_addr);
2219 ld(tmp, arg_addr);
2221 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
2222 profile_obj_type(tmp, mdo_arg_addr);
2224 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
2225 //addptr(mdp, to_add);
2226 if (Assembler::is_simm16(to_add)) {
2227 daddiu(mdp, mdp, to_add);
2228 } else {
2229 move(AT, to_add);
2230 daddu(mdp, mdp, AT);
2231 }
2233 off_to_args += to_add;
2234 }
2236 if (MethodData::profile_return()) {
2237 //movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
2238 ld(tmp, mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args);
2240 //subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
2241 int tmp_arg_counts = TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count();
2242 if (Assembler::is_simm16(-1 * tmp_arg_counts)) {
2243 addiu32(tmp, tmp, -1 * tmp_arg_counts);
2244 } else {
2245 move(AT, tmp_arg_counts);
2246 subu32(mdp, mdp, AT);
2247 }
2248 }
2250 bind(done);
2252 if (MethodData::profile_return()) {
2253 // We're right after the type profile for the last
2254 // argument. tmp is the number of cells left in the
2255 // CallTypeData/VirtualCallTypeData to reach its end. Non null
2256 // if there's a return to profile.
2257 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
2258 //shll(tmp, exact_log2(DataLayout::cell_size));
2259 //addptr(mdp, tmp);
2260 sll(tmp, tmp, exact_log2(DataLayout::cell_size));
2261 daddu(mdp, mdp, tmp);
2262 }
2263 //movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp);
2264 sd(mdp, FP, frame::interpreter_frame_mdx_offset * wordSize);
2265 } else {
2266 assert(MethodData::profile_return(), "either profile call args or call ret");
2267 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
2268 }
2270 // mdp points right after the end of the
2271 // CallTypeData/VirtualCallTypeData, right after the cells for the
2272 // return value type if there's one
2274 bind(profile_continue);
2275 }
2276 }
2278 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
2279 assert_different_registers(mdp, ret, tmp, _bcp_register);
2280 if (ProfileInterpreter && MethodData::profile_return()) {
2281 Label profile_continue, done;
2283 test_method_data_pointer(mdp, profile_continue);
2285 if (MethodData::profile_return_jsr292_only()) {
2286 // If we don't profile all invoke bytecodes we must make sure
2287 // it's a bytecode we indeed profile. We can't go back to the
2288 // begining of the ProfileData we intend to update to check its
2289 // type because we're right after it and we don't known its
2290 // length
2291 Label do_profile;
2292 //cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
2293 //jcc(Assembler::equal, do_profile);
2294 lb(AT, _bcp_register, 0);
2295 daddiu(AT, AT, -1 * Bytecodes::_invokedynamic);
2296 beq(AT, R0, do_profile);
2297 nop();
2299 //cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
2300 //jcc(Assembler::equal, do_profile);
2301 lb(AT, _bcp_register, 0);
2302 daddiu(AT, AT, -1 * Bytecodes::_invokehandle);
2303 beq(AT, R0, do_profile);
2304 nop();
2306 get_method(tmp);
2307 //cmpb(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm);
2308 //jcc(Assembler::notEqual, profile_continue);
2309 lb(tmp, tmp, Method::intrinsic_id_offset_in_bytes());
2310 li(AT, vmIntrinsics::_compiledLambdaForm);
2311 bne(tmp, AT, profile_continue);
2312 nop();
2314 bind(do_profile);
2315 }
2317 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
2318 //mov(tmp, ret);
2319 daddu(tmp, ret, R0);
2320 profile_obj_type(tmp, mdo_ret_addr);
2322 bind(profile_continue);
2323 }
2324 }
2326 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
2327 guarantee(T9 == tmp1, "You are reqired to use T9 as the index register for MIPS !");
2329 if (ProfileInterpreter && MethodData::profile_parameters()) {
2330 Label profile_continue, done;
2332 test_method_data_pointer(mdp, profile_continue);
2334 // Load the offset of the area within the MDO used for
2335 // parameters. If it's negative we're not profiling any parameters
2336 //movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
2337 //testl(tmp1, tmp1);
2338 //jcc(Assembler::negative, profile_continue);
2339 lw(tmp1, mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset()));
2340 bltz(tmp1, profile_continue);
2341 nop();
2343 // Compute a pointer to the area for parameters from the offset
2344 // and move the pointer to the slot for the last
2345 // parameters. Collect profiling from last parameter down.
2346 // mdo start + parameters offset + array length - 1
2347 //addptr(mdp, tmp1);
2348 //movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
2349 daddu(mdp, mdp, tmp1);
2350 ld(tmp1, mdp, in_bytes(ArrayData::array_len_offset()));
2351 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
2354 Label loop;
2355 bind(loop);
2357 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
2358 int type_base = in_bytes(ParametersTypeData::type_offset(0));
2359 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
2360 //Address arg_off(mdp, tmp1, per_arg_scale, off_base);
2361 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
2363 // load offset on the stack from the slot for this parameter
2364 //movptr(tmp2, arg_off);
2365 dsll(AT, tmp1, per_arg_scale);
2366 daddu(AT, AT, mdp);
2367 ld(tmp2, AT, off_base);
2369 //negptr(tmp2);
2370 subu(tmp2, R0, tmp2);
2372 // read the parameter from the local area
2373 //movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
2374 dsll(AT, tmp2, Interpreter::stackElementScale());
2375 daddu(AT, AT, _locals_register);
2376 ld(tmp2, AT, 0);
2378 // profile the parameter
2379 profile_obj_type(tmp2, arg_type);
2381 // go to next parameter
2382 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
2383 //jcc(Assembler::positive, loop);
2384 bgtz(tmp1, loop);
2385 nop();
2387 bind(profile_continue);
2388 }
2389 }
2391 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
2392 if (state == atos) {
2393 MacroAssembler::verify_oop(reg);
2394 }
2395 }
2397 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
2398 // only if +VerifyFPU && (state == ftos || state == dtos)
2399 // For now, do nothing.
2400 }
2401 #endif // !CC_INTERP
2404 //FIXME, aoqi:see UltraViolet
2405 void InterpreterMacroAssembler::notify_method_entry() {
2406 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2407 // track stack depth. If it is possible to enter interp_only_mode we add
2408 // the code to check if the event should be sent.
2409 //Register tempreg = Rscratch0;
2410 Register tempreg = T0;
2411 if (JvmtiExport::can_post_interpreter_events()) {
2412 Label L;
2413 //movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset()));
2414 //testl(rdx, rdx);
2415 //jcc(Assembler::zero, L);
2416 //lw(tempreg, in_bytes(JavaThread::interp_only_mode_offset()), Rthread);
2417 get_thread(AT);
2418 lw(tempreg, AT, in_bytes(JavaThread::interp_only_mode_offset()));
2419 beq(tempreg, R0, L);
2420 delayed()->nop();
2421 call_VM(noreg, CAST_FROM_FN_PTR(address,
2422 InterpreterRuntime::post_method_entry));
2423 bind(L);
2424 }
2426 {
2427 //SkipIfEqual skip_if(this, tempreg, R0, &DTraceMethodProbes, 1);
2428 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
2429 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
2430 //Rthread,
2431 AT,
2432 //Rmethod);
2433 S3);
2434 }
2436 }
2438 //FIXME, aoqi:see UltraViolet
2439 void InterpreterMacroAssembler::notify_method_exit(
2440 //TosState state, NotifyMethodExitMode mode) {
2441 bool is_native_method, TosState state, NotifyMethodExitMode mode) {
2442 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2443 // track stack depth. If it is possible to enter interp_only_mode we add
2444 // the code to check if the event should be sent.
2445 //Register tempreg = Rscratch0;
2446 Register tempreg = T0;
2447 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2448 Label skip;
2449 //lw(tempreg, in_bytes(JavaThread::interp_only_mode_offset()), Rthread);
2450 get_thread(AT);
2451 lw(tempreg, AT, in_bytes(JavaThread::interp_only_mode_offset()));
2452 beq(tempreg, R0, skip);
2453 delayed()->nop();
2454 // Note: frame::interpreter_frame_result has a dependency on how the
2455 // method result is saved across the call to post_method_exit. If this
2456 // is changed then the interpreter_frame_result implementation will
2457 // need to be updated too.
2459 // For c++ interpreter the result is always stored at a known location in the frame
2460 // template interpreter will leave it on the top of the stack.
2461 save_return_value(state, is_native_method);
2462 call_VM(noreg,
2463 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2464 restore_return_value(state, is_native_method);
2465 bind(skip);
2466 }
2468 {
2469 // Dtrace notification
2470 //SkipIfEqual skip_if(this, tempreg, R0, &DTraceMethodProbes, equal);
2471 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
2472 save_return_value(state, is_native_method);
2473 call_VM_leaf(
2474 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2475 //Rthread, Rmethod);
2476 AT, S3);
2477 restore_return_value(state, is_native_method);
2478 }
2479 }
2481 //FIXME yyq native return 64 bits
2482 void InterpreterMacroAssembler::save_return_value(
2483 TosState state, bool is_native_call) {
2484 if (is_native_call) {
2485 // save any potential method result value
2486 //sd(V0, frame::interpreter_frame_l_scratch_offset * wordSize, FP);
2487 //sdc1(F0, frame::interpreter_frame_d_scratch_offset * wordSize, FP);
2488 sw(V0, FP, (-9) * wordSize);
2489 swc1(F0, FP, (-10) * wordSize);
2491 // sd(V0, FP, (-9) * wordSize);
2492 // sdc1(F0, FP, (-10) * wordSize);
2493 } else {
2494 push(state);
2495 }
2496 }
2498 //FIXME yyq native return 64 bits
2499 void InterpreterMacroAssembler::restore_return_value(
2500 TosState state, bool is_native_call) {
2501 if (is_native_call) {
2502 // Restore any method result value
2503 //ld(V0, frame::interpreter_frame_l_scratch_offset * wordSize, FP);
2504 //ldc1(F0, frame::interpreter_frame_d_scratch_offset * wordSize, FP);
2505 lw(V0, FP, (-9) * wordSize);
2506 lwc1(F0, FP, (-10) * wordSize);
2507 } else {
2508 pop(state);
2509 }
2510 }