Tue, 21 Jun 2011 09:04:55 -0700
7056380: VM crashes with SIGSEGV in compiled code
Summary: code was using andq reg, imm instead of addq addr, imm
Reviewed-by: kvn, jrose, twisti
1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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23 */
25 #include "precompiled.hpp"
26 #include "interp_masm_x86_32.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "oops/arrayOop.hpp"
30 #include "oops/markOop.hpp"
31 #include "oops/methodDataOop.hpp"
32 #include "oops/methodOop.hpp"
33 #include "prims/jvmtiExport.hpp"
34 #include "prims/jvmtiRedefineClassesTrace.hpp"
35 #include "prims/jvmtiThreadState.hpp"
36 #include "runtime/basicLock.hpp"
37 #include "runtime/biasedLocking.hpp"
38 #include "runtime/sharedRuntime.hpp"
39 #ifdef TARGET_OS_FAMILY_linux
40 # include "thread_linux.inline.hpp"
41 #endif
42 #ifdef TARGET_OS_FAMILY_solaris
43 # include "thread_solaris.inline.hpp"
44 #endif
45 #ifdef TARGET_OS_FAMILY_windows
46 # include "thread_windows.inline.hpp"
47 #endif
50 // Implementation of InterpreterMacroAssembler
51 #ifdef CC_INTERP
52 void InterpreterMacroAssembler::get_method(Register reg) {
53 movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize)));
54 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method)));
55 }
56 #endif // CC_INTERP
59 #ifndef CC_INTERP
60 void InterpreterMacroAssembler::call_VM_leaf_base(
61 address entry_point,
62 int number_of_arguments
63 ) {
64 // interpreter specific
65 //
66 // Note: No need to save/restore bcp & locals (rsi & rdi) pointer
67 // since these are callee saved registers and no blocking/
68 // GC can happen in leaf calls.
69 // Further Note: DO NOT save/restore bcp/locals. If a caller has
70 // already saved them so that it can use rsi/rdi as temporaries
71 // then a save/restore here will DESTROY the copy the caller
72 // saved! There used to be a save_bcp() that only happened in
73 // the ASSERT path (no restore_bcp). Which caused bizarre failures
74 // when jvm built with ASSERTs.
75 #ifdef ASSERT
76 { Label L;
77 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
78 jcc(Assembler::equal, L);
79 stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL");
80 bind(L);
81 }
82 #endif
83 // super call
84 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
85 // interpreter specific
87 // Used to ASSERT that rsi/rdi were equal to frame's bcp/locals
88 // but since they may not have been saved (and we don't want to
89 // save them here (see note above) the assert is invalid.
90 }
93 void InterpreterMacroAssembler::call_VM_base(
94 Register oop_result,
95 Register java_thread,
96 Register last_java_sp,
97 address entry_point,
98 int number_of_arguments,
99 bool check_exceptions
100 ) {
101 #ifdef ASSERT
102 { Label L;
103 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
104 jcc(Assembler::equal, L);
105 stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL");
106 bind(L);
107 }
108 #endif /* ASSERT */
109 // interpreter specific
110 //
111 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
112 // really make a difference for these runtime calls, since they are
113 // slow anyway. Btw., bcp must be saved/restored since it may change
114 // due to GC.
115 assert(java_thread == noreg , "not expecting a precomputed java thread");
116 save_bcp();
117 // super call
118 MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
119 // interpreter specific
120 restore_bcp();
121 restore_locals();
122 }
125 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
126 if (JvmtiExport::can_pop_frame()) {
127 Label L;
128 // Initiate popframe handling only if it is not already being processed. If the flag
129 // has the popframe_processing bit set, it means that this code is called *during* popframe
130 // handling - we don't want to reenter.
131 Register pop_cond = java_thread; // Not clear if any other register is available...
132 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
133 testl(pop_cond, JavaThread::popframe_pending_bit);
134 jcc(Assembler::zero, L);
135 testl(pop_cond, JavaThread::popframe_processing_bit);
136 jcc(Assembler::notZero, L);
137 // Call Interpreter::remove_activation_preserving_args_entry() to get the
138 // address of the same-named entrypoint in the generated interpreter code.
139 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
140 jmp(rax);
141 bind(L);
142 get_thread(java_thread);
143 }
144 }
147 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
148 get_thread(rcx);
149 movl(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset()));
150 const Address tos_addr (rcx, JvmtiThreadState::earlyret_tos_offset());
151 const Address oop_addr (rcx, JvmtiThreadState::earlyret_oop_offset());
152 const Address val_addr (rcx, JvmtiThreadState::earlyret_value_offset());
153 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
154 + in_ByteSize(wordSize));
155 switch (state) {
156 case atos: movptr(rax, oop_addr);
157 movptr(oop_addr, NULL_WORD);
158 verify_oop(rax, state); break;
159 case ltos:
160 movl(rdx, val_addr1); // fall through
161 case btos: // fall through
162 case ctos: // fall through
163 case stos: // fall through
164 case itos: movl(rax, val_addr); break;
165 case ftos: fld_s(val_addr); break;
166 case dtos: fld_d(val_addr); break;
167 case vtos: /* nothing to do */ break;
168 default : ShouldNotReachHere();
169 }
170 // Clean up tos value in the thread object
171 movl(tos_addr, (int32_t) ilgl);
172 movptr(val_addr, NULL_WORD);
173 NOT_LP64(movptr(val_addr1, NULL_WORD));
174 }
177 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
178 if (JvmtiExport::can_force_early_return()) {
179 Label L;
180 Register tmp = java_thread;
181 movptr(tmp, Address(tmp, JavaThread::jvmti_thread_state_offset()));
182 testptr(tmp, tmp);
183 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
185 // Initiate earlyret handling only if it is not already being processed.
186 // If the flag has the earlyret_processing bit set, it means that this code
187 // is called *during* earlyret handling - we don't want to reenter.
188 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
189 cmpl(tmp, JvmtiThreadState::earlyret_pending);
190 jcc(Assembler::notEqual, L);
192 // Call Interpreter::remove_activation_early_entry() to get the address of the
193 // same-named entrypoint in the generated interpreter code.
194 get_thread(java_thread);
195 movptr(tmp, Address(java_thread, JavaThread::jvmti_thread_state_offset()));
196 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
197 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
198 jmp(rax);
199 bind(L);
200 get_thread(java_thread);
201 }
202 }
205 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
206 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
207 movl(reg, Address(rsi, bcp_offset));
208 bswapl(reg);
209 shrl(reg, 16);
210 }
213 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register reg, int bcp_offset, size_t index_size) {
214 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
215 if (index_size == sizeof(u2)) {
216 load_unsigned_short(reg, Address(rsi, bcp_offset));
217 } else if (index_size == sizeof(u4)) {
218 assert(EnableInvokeDynamic, "giant index used only for JSR 292");
219 movl(reg, Address(rsi, bcp_offset));
220 // Check if the secondary index definition is still ~x, otherwise
221 // we have to change the following assembler code to calculate the
222 // plain index.
223 assert(constantPoolCacheOopDesc::decode_secondary_index(~123) == 123, "else change next line");
224 notl(reg); // convert to plain index
225 } else if (index_size == sizeof(u1)) {
226 assert(EnableInvokeDynamic, "tiny index used only for JSR 292");
227 load_unsigned_byte(reg, Address(rsi, bcp_offset));
228 } else {
229 ShouldNotReachHere();
230 }
231 }
234 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index,
235 int bcp_offset, size_t index_size) {
236 assert(cache != index, "must use different registers");
237 get_cache_index_at_bcp(index, bcp_offset, index_size);
238 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
239 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
240 shlptr(index, 2); // convert from field index to ConstantPoolCacheEntry index
241 }
244 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
245 int bcp_offset, size_t index_size) {
246 assert(cache != tmp, "must use different register");
247 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
248 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
249 // convert from field index to ConstantPoolCacheEntry index
250 // and from word offset to byte offset
251 shll(tmp, 2 + LogBytesPerWord);
252 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
253 // skip past the header
254 addptr(cache, in_bytes(constantPoolCacheOopDesc::base_offset()));
255 addptr(cache, tmp); // construct pointer to cache entry
256 }
259 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
260 // a subtype of super_klass. EAX holds the super_klass. Blows ECX.
261 // Resets EDI to locals. Register sub_klass cannot be any of the above.
262 void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) {
263 assert( Rsub_klass != rax, "rax, holds superklass" );
264 assert( Rsub_klass != rcx, "used as a temp" );
265 assert( Rsub_klass != rdi, "used as a temp, restored from locals" );
267 // Profile the not-null value's klass.
268 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
270 // Do the check.
271 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
273 // Profile the failure of the check.
274 profile_typecheck_failed(rcx); // blows rcx
275 }
277 void InterpreterMacroAssembler::f2ieee() {
278 if (IEEEPrecision) {
279 fstp_s(Address(rsp, 0));
280 fld_s(Address(rsp, 0));
281 }
282 }
285 void InterpreterMacroAssembler::d2ieee() {
286 if (IEEEPrecision) {
287 fstp_d(Address(rsp, 0));
288 fld_d(Address(rsp, 0));
289 }
290 }
292 // Java Expression Stack
294 void InterpreterMacroAssembler::pop_ptr(Register r) {
295 pop(r);
296 }
298 void InterpreterMacroAssembler::pop_i(Register r) {
299 pop(r);
300 }
302 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
303 pop(lo);
304 pop(hi);
305 }
307 void InterpreterMacroAssembler::pop_f() {
308 fld_s(Address(rsp, 0));
309 addptr(rsp, 1 * wordSize);
310 }
312 void InterpreterMacroAssembler::pop_d() {
313 fld_d(Address(rsp, 0));
314 addptr(rsp, 2 * wordSize);
315 }
318 void InterpreterMacroAssembler::pop(TosState state) {
319 switch (state) {
320 case atos: pop_ptr(rax); break;
321 case btos: // fall through
322 case ctos: // fall through
323 case stos: // fall through
324 case itos: pop_i(rax); break;
325 case ltos: pop_l(rax, rdx); break;
326 case ftos: pop_f(); break;
327 case dtos: pop_d(); break;
328 case vtos: /* nothing to do */ break;
329 default : ShouldNotReachHere();
330 }
331 verify_oop(rax, state);
332 }
334 void InterpreterMacroAssembler::push_ptr(Register r) {
335 push(r);
336 }
338 void InterpreterMacroAssembler::push_i(Register r) {
339 push(r);
340 }
342 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
343 push(hi);
344 push(lo);
345 }
347 void InterpreterMacroAssembler::push_f() {
348 // Do not schedule for no AGI! Never write beyond rsp!
349 subptr(rsp, 1 * wordSize);
350 fstp_s(Address(rsp, 0));
351 }
353 void InterpreterMacroAssembler::push_d(Register r) {
354 // Do not schedule for no AGI! Never write beyond rsp!
355 subptr(rsp, 2 * wordSize);
356 fstp_d(Address(rsp, 0));
357 }
360 void InterpreterMacroAssembler::push(TosState state) {
361 verify_oop(rax, state);
362 switch (state) {
363 case atos: push_ptr(rax); break;
364 case btos: // fall through
365 case ctos: // fall through
366 case stos: // fall through
367 case itos: push_i(rax); break;
368 case ltos: push_l(rax, rdx); break;
369 case ftos: push_f(); break;
370 case dtos: push_d(rax); break;
371 case vtos: /* nothing to do */ break;
372 default : ShouldNotReachHere();
373 }
374 }
377 // Helpers for swap and dup
378 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
379 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
380 }
382 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
383 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
384 }
386 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
387 // set sender sp
388 lea(rsi, Address(rsp, wordSize));
389 // record last_sp
390 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi);
391 }
394 // Jump to from_interpreted entry of a call unless single stepping is possible
395 // in this thread in which case we must call the i2i entry
396 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
397 prepare_to_jump_from_interpreted();
399 if (JvmtiExport::can_post_interpreter_events()) {
400 Label run_compiled_code;
401 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
402 // compiled code in threads for which the event is enabled. Check here for
403 // interp_only_mode if these events CAN be enabled.
404 get_thread(temp);
405 // interp_only is an int, on little endian it is sufficient to test the byte only
406 // Is a cmpl faster (ce
407 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
408 jcc(Assembler::zero, run_compiled_code);
409 jmp(Address(method, methodOopDesc::interpreter_entry_offset()));
410 bind(run_compiled_code);
411 }
413 jmp(Address(method, methodOopDesc::from_interpreted_offset()));
415 }
418 // The following two routines provide a hook so that an implementation
419 // can schedule the dispatch in two parts. Intel does not do this.
420 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
421 // Nothing Intel-specific to be done here.
422 }
424 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
425 dispatch_next(state, step);
426 }
428 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table,
429 bool verifyoop) {
430 verify_FPU(1, state);
431 if (VerifyActivationFrameSize) {
432 Label L;
433 mov(rcx, rbp);
434 subptr(rcx, rsp);
435 int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize;
436 cmpptr(rcx, min_frame_size);
437 jcc(Assembler::greaterEqual, L);
438 stop("broken stack frame");
439 bind(L);
440 }
441 if (verifyoop) verify_oop(rax, state);
442 Address index(noreg, rbx, Address::times_ptr);
443 ExternalAddress tbl((address)table);
444 ArrayAddress dispatch(tbl, index);
445 jump(dispatch);
446 }
449 void InterpreterMacroAssembler::dispatch_only(TosState state) {
450 dispatch_base(state, Interpreter::dispatch_table(state));
451 }
454 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
455 dispatch_base(state, Interpreter::normal_table(state));
456 }
458 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
459 dispatch_base(state, Interpreter::normal_table(state), false);
460 }
463 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
464 // load next bytecode (load before advancing rsi to prevent AGI)
465 load_unsigned_byte(rbx, Address(rsi, step));
466 // advance rsi
467 increment(rsi, step);
468 dispatch_base(state, Interpreter::dispatch_table(state));
469 }
472 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
473 // load current bytecode
474 load_unsigned_byte(rbx, Address(rsi, 0));
475 dispatch_base(state, table);
476 }
478 // remove activation
479 //
480 // Unlock the receiver if this is a synchronized method.
481 // Unlock any Java monitors from syncronized blocks.
482 // Remove the activation from the stack.
483 //
484 // If there are locked Java monitors
485 // If throw_monitor_exception
486 // throws IllegalMonitorStateException
487 // Else if install_monitor_exception
488 // installs IllegalMonitorStateException
489 // Else
490 // no error processing
491 void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr,
492 bool throw_monitor_exception,
493 bool install_monitor_exception,
494 bool notify_jvmdi) {
495 // Note: Registers rax, rdx and FPU ST(0) may be in use for the result
496 // check if synchronized method
497 Label unlocked, unlock, no_unlock;
499 get_thread(rcx);
500 const Address do_not_unlock_if_synchronized(rcx,
501 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
503 movbool(rbx, do_not_unlock_if_synchronized);
504 mov(rdi,rbx);
505 movbool(do_not_unlock_if_synchronized, false); // reset the flag
507 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags
508 movl(rcx, Address(rbx, methodOopDesc::access_flags_offset()));
510 testl(rcx, JVM_ACC_SYNCHRONIZED);
511 jcc(Assembler::zero, unlocked);
513 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
514 // is set.
515 mov(rcx,rdi);
516 testbool(rcx);
517 jcc(Assembler::notZero, no_unlock);
519 // unlock monitor
520 push(state); // save result
522 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
523 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
524 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
525 lea (rdx, monitor); // address of first monitor
527 movptr (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
528 testptr(rax, rax);
529 jcc (Assembler::notZero, unlock);
531 pop(state);
532 if (throw_monitor_exception) {
533 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
535 // Entry already unlocked, need to throw exception
536 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
537 should_not_reach_here();
538 } else {
539 // Monitor already unlocked during a stack unroll.
540 // If requested, install an illegal_monitor_state_exception.
541 // Continue with stack unrolling.
542 if (install_monitor_exception) {
543 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
544 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
545 }
546 jmp(unlocked);
547 }
549 bind(unlock);
550 unlock_object(rdx);
551 pop(state);
553 // Check that for block-structured locking (i.e., that all locked objects has been unlocked)
554 bind(unlocked);
556 // rax, rdx: Might contain return value
558 // Check that all monitors are unlocked
559 {
560 Label loop, exception, entry, restart;
561 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
562 const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
563 const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
565 bind(restart);
566 movptr(rcx, monitor_block_top); // points to current entry, starting with top-most entry
567 lea(rbx, monitor_block_bot); // points to word before bottom of monitor block
568 jmp(entry);
570 // Entry already locked, need to throw exception
571 bind(exception);
573 if (throw_monitor_exception) {
574 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
576 // Throw exception
577 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
578 should_not_reach_here();
579 } else {
580 // Stack unrolling. Unlock object and install illegal_monitor_exception
581 // Unlock does not block, so don't have to worry about the frame
583 push(state);
584 mov(rdx, rcx);
585 unlock_object(rdx);
586 pop(state);
588 if (install_monitor_exception) {
589 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
590 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
591 }
593 jmp(restart);
594 }
596 bind(loop);
597 cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); // check if current entry is used
598 jcc(Assembler::notEqual, exception);
600 addptr(rcx, entry_size); // otherwise advance to next entry
601 bind(entry);
602 cmpptr(rcx, rbx); // check if bottom reached
603 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
604 }
606 bind(no_unlock);
608 // jvmti support
609 if (notify_jvmdi) {
610 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
611 } else {
612 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
613 }
615 // remove activation
616 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
617 leave(); // remove frame anchor
618 pop(ret_addr); // get return address
619 mov(rsp, rbx); // set sp to sender sp
620 if (UseSSE) {
621 // float and double are returned in xmm register in SSE-mode
622 if (state == ftos && UseSSE >= 1) {
623 subptr(rsp, wordSize);
624 fstp_s(Address(rsp, 0));
625 movflt(xmm0, Address(rsp, 0));
626 addptr(rsp, wordSize);
627 } else if (state == dtos && UseSSE >= 2) {
628 subptr(rsp, 2*wordSize);
629 fstp_d(Address(rsp, 0));
630 movdbl(xmm0, Address(rsp, 0));
631 addptr(rsp, 2*wordSize);
632 }
633 }
634 }
636 #endif /* !CC_INTERP */
639 // Lock object
640 //
641 // Argument: rdx : Points to BasicObjectLock to be used for locking. Must
642 // be initialized with object to lock
643 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
644 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
646 if (UseHeavyMonitors) {
647 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
648 } else {
650 Label done;
652 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
653 const Register obj_reg = rcx; // Will contain the oop
655 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
656 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
657 const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes();
659 Label slow_case;
661 // Load object pointer into obj_reg %rcx
662 movptr(obj_reg, Address(lock_reg, obj_offset));
664 if (UseBiasedLocking) {
665 // Note: we use noreg for the temporary register since it's hard
666 // to come up with a free register on all incoming code paths
667 biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case);
668 }
670 // Load immediate 1 into swap_reg %rax,
671 movptr(swap_reg, (int32_t)1);
673 // Load (object->mark() | 1) into swap_reg %rax,
674 orptr(swap_reg, Address(obj_reg, 0));
676 // Save (object->mark() | 1) into BasicLock's displaced header
677 movptr(Address(lock_reg, mark_offset), swap_reg);
679 assert(lock_offset == 0, "displached header must be first word in BasicObjectLock");
680 if (os::is_MP()) {
681 lock();
682 }
683 cmpxchgptr(lock_reg, Address(obj_reg, 0));
684 if (PrintBiasedLockingStatistics) {
685 cond_inc32(Assembler::zero,
686 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
687 }
688 jcc(Assembler::zero, done);
690 // Test if the oopMark is an obvious stack pointer, i.e.,
691 // 1) (mark & 3) == 0, and
692 // 2) rsp <= mark < mark + os::pagesize()
693 //
694 // These 3 tests can be done by evaluating the following
695 // expression: ((mark - rsp) & (3 - os::vm_page_size())),
696 // assuming both stack pointer and pagesize have their
697 // least significant 2 bits clear.
698 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg
699 subptr(swap_reg, rsp);
700 andptr(swap_reg, 3 - os::vm_page_size());
702 // Save the test result, for recursive case, the result is zero
703 movptr(Address(lock_reg, mark_offset), swap_reg);
705 if (PrintBiasedLockingStatistics) {
706 cond_inc32(Assembler::zero,
707 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
708 }
709 jcc(Assembler::zero, done);
711 bind(slow_case);
713 // Call the runtime routine for slow case
714 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
716 bind(done);
717 }
718 }
721 // Unlocks an object. Used in monitorexit bytecode and remove_activation.
722 //
723 // Argument: rdx : Points to BasicObjectLock structure for lock
724 // Throw an IllegalMonitorException if object is not locked by current thread
725 //
726 // Uses: rax, rbx, rcx, rdx
727 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
728 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
730 if (UseHeavyMonitors) {
731 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
732 } else {
733 Label done;
735 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
736 const Register header_reg = rbx; // Will contain the old oopMark
737 const Register obj_reg = rcx; // Will contain the oop
739 save_bcp(); // Save in case of exception
741 // Convert from BasicObjectLock structure to object and BasicLock structure
742 // Store the BasicLock address into %rax,
743 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
745 // Load oop into obj_reg(%rcx)
746 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ()));
748 // Free entry
749 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
751 if (UseBiasedLocking) {
752 biased_locking_exit(obj_reg, header_reg, done);
753 }
755 // Load the old header from BasicLock structure
756 movptr(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes()));
758 // Test for recursion
759 testptr(header_reg, header_reg);
761 // zero for recursive case
762 jcc(Assembler::zero, done);
764 // Atomic swap back the old header
765 if (os::is_MP()) lock();
766 cmpxchgptr(header_reg, Address(obj_reg, 0));
768 // zero for recursive case
769 jcc(Assembler::zero, done);
771 // Call the runtime routine for slow case.
772 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj
773 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
775 bind(done);
777 restore_bcp();
778 }
779 }
782 #ifndef CC_INTERP
784 // Test ImethodDataPtr. If it is null, continue at the specified label
785 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) {
786 assert(ProfileInterpreter, "must be profiling interpreter");
787 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize));
788 testptr(mdp, mdp);
789 jcc(Assembler::zero, zero_continue);
790 }
793 // Set the method data pointer for the current bcp.
794 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
795 assert(ProfileInterpreter, "must be profiling interpreter");
796 Label set_mdp;
797 push(rax);
798 push(rbx);
800 get_method(rbx);
801 // Test MDO to avoid the call if it is NULL.
802 movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
803 testptr(rax, rax);
804 jcc(Assembler::zero, set_mdp);
805 // rbx,: method
806 // rsi: bcp
807 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi);
808 // rax,: mdi
809 // mdo is guaranteed to be non-zero here, we checked for it before the call.
810 movptr(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
811 addptr(rbx, in_bytes(methodDataOopDesc::data_offset()));
812 addptr(rax, rbx);
813 bind(set_mdp);
814 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
815 pop(rbx);
816 pop(rax);
817 }
819 void InterpreterMacroAssembler::verify_method_data_pointer() {
820 assert(ProfileInterpreter, "must be profiling interpreter");
821 #ifdef ASSERT
822 Label verify_continue;
823 push(rax);
824 push(rbx);
825 push(rcx);
826 push(rdx);
827 test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue
828 get_method(rbx);
830 // If the mdp is valid, it will point to a DataLayout header which is
831 // consistent with the bcp. The converse is highly probable also.
832 load_unsigned_short(rdx, Address(rcx, in_bytes(DataLayout::bci_offset())));
833 addptr(rdx, Address(rbx, methodOopDesc::const_offset()));
834 lea(rdx, Address(rdx, constMethodOopDesc::codes_offset()));
835 cmpptr(rdx, rsi);
836 jcc(Assembler::equal, verify_continue);
837 // rbx,: method
838 // rsi: bcp
839 // rcx: mdp
840 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx);
841 bind(verify_continue);
842 pop(rdx);
843 pop(rcx);
844 pop(rbx);
845 pop(rax);
846 #endif // ASSERT
847 }
850 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) {
851 // %%% this seems to be used to store counter data which is surely 32bits
852 // however 64bit side stores 64 bits which seems wrong
853 assert(ProfileInterpreter, "must be profiling interpreter");
854 Address data(mdp_in, constant);
855 movptr(data, value);
856 }
859 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
860 int constant,
861 bool decrement) {
862 // Counter address
863 Address data(mdp_in, constant);
865 increment_mdp_data_at(data, decrement);
866 }
869 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
870 bool decrement) {
872 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
873 assert(ProfileInterpreter, "must be profiling interpreter");
875 // %%% 64bit treats this as 64 bit which seems unlikely
876 if (decrement) {
877 // Decrement the register. Set condition codes.
878 addl(data, -DataLayout::counter_increment);
879 // If the decrement causes the counter to overflow, stay negative
880 Label L;
881 jcc(Assembler::negative, L);
882 addl(data, DataLayout::counter_increment);
883 bind(L);
884 } else {
885 assert(DataLayout::counter_increment == 1,
886 "flow-free idiom only works with 1");
887 // Increment the register. Set carry flag.
888 addl(data, DataLayout::counter_increment);
889 // If the increment causes the counter to overflow, pull back by 1.
890 sbbl(data, 0);
891 }
892 }
895 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
896 Register reg,
897 int constant,
898 bool decrement) {
899 Address data(mdp_in, reg, Address::times_1, constant);
901 increment_mdp_data_at(data, decrement);
902 }
905 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) {
906 assert(ProfileInterpreter, "must be profiling interpreter");
907 int header_offset = in_bytes(DataLayout::header_offset());
908 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
909 // Set the flag
910 orl(Address(mdp_in, header_offset), header_bits);
911 }
915 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
916 int offset,
917 Register value,
918 Register test_value_out,
919 Label& not_equal_continue) {
920 assert(ProfileInterpreter, "must be profiling interpreter");
921 if (test_value_out == noreg) {
922 cmpptr(value, Address(mdp_in, offset));
923 } else {
924 // Put the test value into a register, so caller can use it:
925 movptr(test_value_out, Address(mdp_in, offset));
926 cmpptr(test_value_out, value);
927 }
928 jcc(Assembler::notEqual, not_equal_continue);
929 }
932 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) {
933 assert(ProfileInterpreter, "must be profiling interpreter");
934 Address disp_address(mdp_in, offset_of_disp);
935 addptr(mdp_in,disp_address);
936 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
937 }
940 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) {
941 assert(ProfileInterpreter, "must be profiling interpreter");
942 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
943 addptr(mdp_in, disp_address);
944 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
945 }
948 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) {
949 assert(ProfileInterpreter, "must be profiling interpreter");
950 addptr(mdp_in, constant);
951 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
952 }
955 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
956 assert(ProfileInterpreter, "must be profiling interpreter");
957 push(return_bci); // save/restore across call_VM
958 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
959 pop(return_bci);
960 }
963 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) {
964 if (ProfileInterpreter) {
965 Label profile_continue;
967 // If no method data exists, go to profile_continue.
968 // Otherwise, assign to mdp
969 test_method_data_pointer(mdp, profile_continue);
971 // We are taking a branch. Increment the taken count.
972 // We inline increment_mdp_data_at to return bumped_count in a register
973 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
974 Address data(mdp, in_bytes(JumpData::taken_offset()));
976 // %%% 64bit treats these cells as 64 bit but they seem to be 32 bit
977 movl(bumped_count,data);
978 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
979 addl(bumped_count, DataLayout::counter_increment);
980 sbbl(bumped_count, 0);
981 movl(data,bumped_count); // Store back out
983 // The method data pointer needs to be updated to reflect the new target.
984 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
985 bind (profile_continue);
986 }
987 }
990 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
991 if (ProfileInterpreter) {
992 Label profile_continue;
994 // If no method data exists, go to profile_continue.
995 test_method_data_pointer(mdp, profile_continue);
997 // We are taking a branch. Increment the not taken count.
998 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1000 // The method data pointer needs to be updated to correspond to the next bytecode
1001 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1002 bind (profile_continue);
1003 }
1004 }
1007 void InterpreterMacroAssembler::profile_call(Register mdp) {
1008 if (ProfileInterpreter) {
1009 Label profile_continue;
1011 // If no method data exists, go to profile_continue.
1012 test_method_data_pointer(mdp, profile_continue);
1014 // We are making a call. Increment the count.
1015 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1017 // The method data pointer needs to be updated to reflect the new target.
1018 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1019 bind (profile_continue);
1020 }
1021 }
1024 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1025 if (ProfileInterpreter) {
1026 Label profile_continue;
1028 // If no method data exists, go to profile_continue.
1029 test_method_data_pointer(mdp, profile_continue);
1031 // We are making a call. Increment the count.
1032 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1034 // The method data pointer needs to be updated to reflect the new target.
1035 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1036 bind (profile_continue);
1037 }
1038 }
1041 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp,
1042 Register reg2,
1043 bool receiver_can_be_null) {
1044 if (ProfileInterpreter) {
1045 Label profile_continue;
1047 // If no method data exists, go to profile_continue.
1048 test_method_data_pointer(mdp, profile_continue);
1050 Label skip_receiver_profile;
1051 if (receiver_can_be_null) {
1052 Label not_null;
1053 testptr(receiver, receiver);
1054 jccb(Assembler::notZero, not_null);
1055 // We are making a call. Increment the count for null receiver.
1056 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1057 jmp(skip_receiver_profile);
1058 bind(not_null);
1059 }
1061 // Record the receiver type.
1062 record_klass_in_profile(receiver, mdp, reg2, true);
1063 bind(skip_receiver_profile);
1065 // The method data pointer needs to be updated to reflect the new target.
1066 update_mdp_by_constant(mdp,
1067 in_bytes(VirtualCallData::
1068 virtual_call_data_size()));
1069 bind(profile_continue);
1070 }
1071 }
1074 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1075 Register receiver, Register mdp,
1076 Register reg2, int start_row,
1077 Label& done, bool is_virtual_call) {
1078 if (TypeProfileWidth == 0) {
1079 if (is_virtual_call) {
1080 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1081 }
1082 return;
1083 }
1085 int last_row = VirtualCallData::row_limit() - 1;
1086 assert(start_row <= last_row, "must be work left to do");
1087 // Test this row for both the receiver and for null.
1088 // Take any of three different outcomes:
1089 // 1. found receiver => increment count and goto done
1090 // 2. found null => keep looking for case 1, maybe allocate this cell
1091 // 3. found something else => keep looking for cases 1 and 2
1092 // Case 3 is handled by a recursive call.
1093 for (int row = start_row; row <= last_row; row++) {
1094 Label next_test;
1095 bool test_for_null_also = (row == start_row);
1097 // See if the receiver is receiver[n].
1098 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1099 test_mdp_data_at(mdp, recvr_offset, receiver,
1100 (test_for_null_also ? reg2 : noreg),
1101 next_test);
1102 // (Reg2 now contains the receiver from the CallData.)
1104 // The receiver is receiver[n]. Increment count[n].
1105 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1106 increment_mdp_data_at(mdp, count_offset);
1107 jmp(done);
1108 bind(next_test);
1110 if (row == start_row) {
1111 Label found_null;
1112 // Failed the equality check on receiver[n]... Test for null.
1113 testptr(reg2, reg2);
1114 if (start_row == last_row) {
1115 // The only thing left to do is handle the null case.
1116 if (is_virtual_call) {
1117 jccb(Assembler::zero, found_null);
1118 // Receiver did not match any saved receiver and there is no empty row for it.
1119 // Increment total counter to indicate polymorphic case.
1120 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1121 jmp(done);
1122 bind(found_null);
1123 } else {
1124 jcc(Assembler::notZero, done);
1125 }
1126 break;
1127 }
1128 // Since null is rare, make it be the branch-taken case.
1129 jcc(Assembler::zero, found_null);
1131 // Put all the "Case 3" tests here.
1132 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
1134 // Found a null. Keep searching for a matching receiver,
1135 // but remember that this is an empty (unused) slot.
1136 bind(found_null);
1137 }
1138 }
1140 // In the fall-through case, we found no matching receiver, but we
1141 // observed the receiver[start_row] is NULL.
1143 // Fill in the receiver field and increment the count.
1144 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1145 set_mdp_data_at(mdp, recvr_offset, receiver);
1146 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1147 movptr(reg2, (int32_t)DataLayout::counter_increment);
1148 set_mdp_data_at(mdp, count_offset, reg2);
1149 if (start_row > 0) {
1150 jmp(done);
1151 }
1152 }
1154 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1155 Register mdp, Register reg2,
1156 bool is_virtual_call) {
1157 assert(ProfileInterpreter, "must be profiling");
1158 Label done;
1160 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1162 bind (done);
1163 }
1165 void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) {
1166 if (ProfileInterpreter) {
1167 Label profile_continue;
1168 uint row;
1170 // If no method data exists, go to profile_continue.
1171 test_method_data_pointer(mdp, profile_continue);
1173 // Update the total ret count.
1174 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1176 for (row = 0; row < RetData::row_limit(); row++) {
1177 Label next_test;
1179 // See if return_bci is equal to bci[n]:
1180 test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci,
1181 noreg, next_test);
1183 // return_bci is equal to bci[n]. Increment the count.
1184 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1186 // The method data pointer needs to be updated to reflect the new target.
1187 update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row)));
1188 jmp(profile_continue);
1189 bind(next_test);
1190 }
1192 update_mdp_for_ret(return_bci);
1194 bind (profile_continue);
1195 }
1196 }
1199 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1200 if (ProfileInterpreter) {
1201 Label profile_continue;
1203 // If no method data exists, go to profile_continue.
1204 test_method_data_pointer(mdp, profile_continue);
1206 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1208 // The method data pointer needs to be updated.
1209 int mdp_delta = in_bytes(BitData::bit_data_size());
1210 if (TypeProfileCasts) {
1211 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1212 }
1213 update_mdp_by_constant(mdp, mdp_delta);
1215 bind (profile_continue);
1216 }
1217 }
1220 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1221 if (ProfileInterpreter && TypeProfileCasts) {
1222 Label profile_continue;
1224 // If no method data exists, go to profile_continue.
1225 test_method_data_pointer(mdp, profile_continue);
1227 int count_offset = in_bytes(CounterData::count_offset());
1228 // Back up the address, since we have already bumped the mdp.
1229 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1231 // *Decrement* the counter. We expect to see zero or small negatives.
1232 increment_mdp_data_at(mdp, count_offset, true);
1234 bind (profile_continue);
1235 }
1236 }
1239 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2)
1240 {
1241 if (ProfileInterpreter) {
1242 Label profile_continue;
1244 // If no method data exists, go to profile_continue.
1245 test_method_data_pointer(mdp, profile_continue);
1247 // The method data pointer needs to be updated.
1248 int mdp_delta = in_bytes(BitData::bit_data_size());
1249 if (TypeProfileCasts) {
1250 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1252 // Record the object type.
1253 record_klass_in_profile(klass, mdp, reg2, false);
1254 assert(reg2 == rdi, "we know how to fix this blown reg");
1255 restore_locals(); // Restore EDI
1256 }
1257 update_mdp_by_constant(mdp, mdp_delta);
1259 bind(profile_continue);
1260 }
1261 }
1264 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1265 if (ProfileInterpreter) {
1266 Label profile_continue;
1268 // If no method data exists, go to profile_continue.
1269 test_method_data_pointer(mdp, profile_continue);
1271 // Update the default case count
1272 increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset()));
1274 // The method data pointer needs to be updated.
1275 update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset()));
1277 bind (profile_continue);
1278 }
1279 }
1282 void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) {
1283 if (ProfileInterpreter) {
1284 Label profile_continue;
1286 // If no method data exists, go to profile_continue.
1287 test_method_data_pointer(mdp, profile_continue);
1289 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
1290 movptr(reg2, (int32_t)in_bytes(MultiBranchData::per_case_size()));
1291 // index is positive and so should have correct value if this code were
1292 // used on 64bits
1293 imulptr(index, reg2);
1294 addptr(index, in_bytes(MultiBranchData::case_array_offset()));
1296 // Update the case count
1297 increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset()));
1299 // The method data pointer needs to be updated.
1300 update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset()));
1302 bind (profile_continue);
1303 }
1304 }
1306 #endif // !CC_INTERP
1310 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1311 if (state == atos) MacroAssembler::verify_oop(reg);
1312 }
1315 #ifndef CC_INTERP
1316 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1317 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
1318 }
1320 #endif /* CC_INTERP */
1323 void InterpreterMacroAssembler::notify_method_entry() {
1324 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1325 // track stack depth. If it is possible to enter interp_only_mode we add
1326 // the code to check if the event should be sent.
1327 if (JvmtiExport::can_post_interpreter_events()) {
1328 Label L;
1329 get_thread(rcx);
1330 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1331 testl(rcx,rcx);
1332 jcc(Assembler::zero, L);
1333 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
1334 bind(L);
1335 }
1337 {
1338 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1339 get_thread(rcx);
1340 get_method(rbx);
1341 call_VM_leaf(
1342 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx);
1343 }
1345 // RedefineClasses() tracing support for obsolete method entry
1346 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
1347 get_thread(rcx);
1348 get_method(rbx);
1349 call_VM_leaf(
1350 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1351 rcx, rbx);
1352 }
1353 }
1356 void InterpreterMacroAssembler::notify_method_exit(
1357 TosState state, NotifyMethodExitMode mode) {
1358 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1359 // track stack depth. If it is possible to enter interp_only_mode we add
1360 // the code to check if the event should be sent.
1361 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1362 Label L;
1363 // Note: frame::interpreter_frame_result has a dependency on how the
1364 // method result is saved across the call to post_method_exit. If this
1365 // is changed then the interpreter_frame_result implementation will
1366 // need to be updated too.
1368 // For c++ interpreter the result is always stored at a known location in the frame
1369 // template interpreter will leave it on the top of the stack.
1370 NOT_CC_INTERP(push(state);)
1371 get_thread(rcx);
1372 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1373 testl(rcx,rcx);
1374 jcc(Assembler::zero, L);
1375 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1376 bind(L);
1377 NOT_CC_INTERP(pop(state);)
1378 }
1380 {
1381 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1382 NOT_CC_INTERP(push(state));
1383 get_thread(rbx);
1384 get_method(rcx);
1385 call_VM_leaf(
1386 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1387 rbx, rcx);
1388 NOT_CC_INTERP(pop(state));
1389 }
1390 }
1392 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1393 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1394 int increment, int mask,
1395 Register scratch, bool preloaded,
1396 Condition cond, Label* where) {
1397 if (!preloaded) {
1398 movl(scratch, counter_addr);
1399 }
1400 incrementl(scratch, increment);
1401 movl(counter_addr, scratch);
1402 andl(scratch, mask);
1403 jcc(cond, *where);
1404 }