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.
22 *
23 */
24
25 #include "compiler/compiler_globals.hpp"
26 #include "interp_masm_x86.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "logging/log.hpp"
30 #include "oops/arrayOop.hpp"
31 #include "oops/markWord.hpp"
32 #include "oops/methodData.hpp"
33 #include "oops/method.hpp"
34 #include "oops/resolvedFieldEntry.hpp"
35 #include "oops/resolvedIndyEntry.hpp"
36 #include "oops/resolvedMethodEntry.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "prims/jvmtiThreadState.hpp"
39 #include "runtime/basicLock.hpp"
40 #include "runtime/frame.inline.hpp"
41 #include "runtime/javaThread.hpp"
42 #include "runtime/safepointMechanism.hpp"
43 #include "runtime/sharedRuntime.hpp"
44 #include "utilities/powerOfTwo.hpp"
45
46 // Implementation of InterpreterMacroAssembler
47
48 void InterpreterMacroAssembler::jump_to_entry(address entry) {
49 assert(entry, "Entry must have been generated by now");
50 jump(RuntimeAddress(entry));
51 }
52
53 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
148 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
149 profile_obj_type(tmp, mdo_arg_addr);
150
151 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
152 addptr(mdp, to_add);
153 off_to_args += to_add;
154 }
155
156 if (MethodData::profile_return()) {
157 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
158 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
159 }
160
161 bind(done);
162
163 if (MethodData::profile_return()) {
164 // We're right after the type profile for the last
165 // argument. tmp is the number of cells left in the
166 // CallTypeData/VirtualCallTypeData to reach its end. Non null
167 // if there's a return to profile.
168 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
169 shll(tmp, log2i_exact((int)DataLayout::cell_size));
170 addptr(mdp, tmp);
171 }
172 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
173 } else {
174 assert(MethodData::profile_return(), "either profile call args or call ret");
175 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
176 }
177
178 // mdp points right after the end of the
179 // CallTypeData/VirtualCallTypeData, right after the cells for the
180 // return value type if there's one
181
182 bind(profile_continue);
183 }
184 }
185
186 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
187 assert_different_registers(mdp, ret, tmp, _bcp_register);
188 if (ProfileInterpreter && MethodData::profile_return()) {
193 if (MethodData::profile_return_jsr292_only()) {
194 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
195
196 // If we don't profile all invoke bytecodes we must make sure
197 // it's a bytecode we indeed profile. We can't go back to the
198 // beginning of the ProfileData we intend to update to check its
199 // type because we're right after it and we don't known its
200 // length
201 Label do_profile;
202 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
203 jcc(Assembler::equal, do_profile);
204 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
205 jcc(Assembler::equal, do_profile);
206 get_method(tmp);
207 cmpw(Address(tmp, Method::intrinsic_id_offset()), static_cast<int>(vmIntrinsics::_compiledLambdaForm));
208 jcc(Assembler::notEqual, profile_continue);
209
210 bind(do_profile);
211 }
212
213 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
214 mov(tmp, ret);
215 profile_obj_type(tmp, mdo_ret_addr);
216
217 bind(profile_continue);
218 }
219 }
220
221 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
222 if (ProfileInterpreter && MethodData::profile_parameters()) {
223 Label profile_continue;
224
225 test_method_data_pointer(mdp, profile_continue);
226
227 // Load the offset of the area within the MDO used for
228 // parameters. If it's negative we're not profiling any parameters
229 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
230 testl(tmp1, tmp1);
231 jcc(Assembler::negative, profile_continue);
232
233 // Compute a pointer to the area for parameters from the offset
565 Register cpool,
566 Register index) {
567 assert_different_registers(cpool, index);
568
569 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
570 Register resolved_klasses = cpool;
571 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset()));
572 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
573 }
574
575 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
576 // subtype of super_klass.
577 //
578 // Args:
579 // rax: superklass
580 // Rsub_klass: subklass
581 //
582 // Kills:
583 // rcx, rdi
584 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
585 Label& ok_is_subtype) {
586 assert(Rsub_klass != rax, "rax holds superklass");
587 assert(Rsub_klass != r14, "r14 holds locals");
588 assert(Rsub_klass != r13, "r13 holds bcp");
589 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
590 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
591
592 // Profile the not-null value's klass.
593 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
594
595 // Do the check.
596 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
597 }
598
599
600 // Java Expression Stack
601
602 void InterpreterMacroAssembler::pop_ptr(Register r) {
603 pop(r);
604 }
605
606 void InterpreterMacroAssembler::push_ptr(Register r) {
607 push(r);
608 }
609
610 void InterpreterMacroAssembler::push_i(Register r) {
611 push(r);
612 }
613
867 Label unlocked, unlock, no_unlock;
868
869 #ifdef ASSERT
870 Label not_preempted;
871 cmpptr(Address(r15_thread, JavaThread::preempt_alternate_return_offset()), NULL_WORD);
872 jcc(Assembler::equal, not_preempted);
873 stop("remove_activation: should not have alternate return address set");
874 bind(not_preempted);
875 #endif /* ASSERT */
876
877 const Register rthread = r15_thread;
878 const Register robj = c_rarg1;
879 const Register rmon = c_rarg1;
880
881 // get the value of _do_not_unlock_if_synchronized into rdx
882 const Address do_not_unlock_if_synchronized(rthread,
883 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
884 movbool(rbx, do_not_unlock_if_synchronized);
885 movbool(do_not_unlock_if_synchronized, false); // reset the flag
886
887 // get method access flags
888 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
889 load_unsigned_short(rcx, Address(rcx, Method::access_flags_offset()));
890 testl(rcx, JVM_ACC_SYNCHRONIZED);
891 jcc(Assembler::zero, unlocked);
892
893 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
894 // is set.
895 testbool(rbx);
896 jcc(Assembler::notZero, no_unlock);
897
898 // unlock monitor
899 push(state); // save result
900
901 // BasicObjectLock will be first in list, since this is a
902 // synchronized method. However, need to check that the object has
903 // not been unlocked by an explicit monitorexit bytecode.
904 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
905 wordSize - (int) sizeof(BasicObjectLock));
906 // We use c_rarg1/rdx so that if we go slow path it will be the correct
907 // register for unlock_object to pass to VM directly
1006 // the stack, will call InterpreterRuntime::at_unwind.
1007 Label slow_path;
1008 Label fast_path;
1009 safepoint_poll(slow_path, true /* at_return */, false /* in_nmethod */);
1010 jmp(fast_path);
1011 bind(slow_path);
1012 push(state);
1013 set_last_Java_frame(noreg, rbp, (address)pc(), rscratch1);
1014 super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), r15_thread);
1015 reset_last_Java_frame(true);
1016 pop(state);
1017 bind(fast_path);
1018
1019 // JVMTI support. Make sure the safepoint poll test is issued prior.
1020 if (notify_jvmdi) {
1021 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1022 } else {
1023 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1024 }
1025
1026 // remove activation
1027 // get sender sp
1028 movptr(rbx,
1029 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1030 if (StackReservedPages > 0) {
1031 // testing if reserved zone needs to be re-enabled
1032 Register rthread = r15_thread;
1033 Label no_reserved_zone_enabling;
1034
1035 // check if already enabled - if so no re-enabling needed
1036 assert(sizeof(StackOverflow::StackGuardState) == 4, "unexpected size");
1037 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), StackOverflow::stack_guard_enabled);
1038 jcc(Assembler::equal, no_reserved_zone_enabling);
1039
1040 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1041 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1042
1043 JFR_ONLY(leave_jfr_critical_section();)
1044
1045 call_VM_leaf(
1046 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1047 call_VM(noreg, CAST_FROM_FN_PTR(address,
1048 InterpreterRuntime::throw_delayed_StackOverflowError));
1049 should_not_reach_here();
1050
1051 bind(no_reserved_zone_enabling);
1052 }
1053
1054 leave(); // remove frame anchor
1055
1056 JFR_ONLY(leave_jfr_critical_section();)
1057
1058 pop(ret_addr); // get return address
1059 mov(rsp, rbx); // set sp to sender sp
1060 pop_cont_fastpath();
1061
1062 }
1063
1064 #if INCLUDE_JFR
1065 void InterpreterMacroAssembler::enter_jfr_critical_section() {
1066 const Address sampling_critical_section(r15_thread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
1067 movbool(sampling_critical_section, true);
1068 }
1069
1070 void InterpreterMacroAssembler::leave_jfr_critical_section() {
1071 const Address sampling_critical_section(r15_thread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
1072 movbool(sampling_critical_section, false);
1073 }
1074 #endif // INCLUDE_JFR
1075
1076 void InterpreterMacroAssembler::get_method_counters(Register method,
1077 Register mcs, Label& skip) {
1078 Label has_counters;
1079 movptr(mcs, Address(method, Method::method_counters_offset()));
1080 testptr(mcs, mcs);
1081 jcc(Assembler::notZero, has_counters);
1082 call_VM(noreg, CAST_FROM_FN_PTR(address,
1083 InterpreterRuntime::build_method_counters), method);
1084 movptr(mcs, Address(method,Method::method_counters_offset()));
1085 testptr(mcs, mcs);
1086 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1087 bind(has_counters);
1088 }
1089
1090
1091 // Lock object
1092 //
1093 // Args:
1094 // rdx, c_rarg1: BasicObjectLock to be used for locking
1095 //
1096 // Kills:
1097 // rax, rbx
1098 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1099 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1");
1100
1101 Label done, slow_case;
1102
1103 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1104 const Register tmp_reg = rbx;
1105 const Register obj_reg = c_rarg3; // Will contain the oop
1106
1107 // Load object pointer into obj_reg
1108 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset()));
1109
1322 }
1323
1324
1325 void InterpreterMacroAssembler::profile_taken_branch(Register mdp) {
1326 if (ProfileInterpreter) {
1327 Label profile_continue;
1328
1329 // If no method data exists, go to profile_continue.
1330 test_method_data_pointer(mdp, profile_continue);
1331
1332 // We are taking a branch. Increment the taken count.
1333 increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1334
1335 // The method data pointer needs to be updated to reflect the new target.
1336 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1337 bind(profile_continue);
1338 }
1339 }
1340
1341
1342 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1343 if (ProfileInterpreter) {
1344 Label profile_continue;
1345
1346 // If no method data exists, go to profile_continue.
1347 test_method_data_pointer(mdp, profile_continue);
1348
1349 // We are not taking a branch. Increment the not taken count.
1350 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1351
1352 // The method data pointer needs to be updated to correspond to
1353 // the next bytecode
1354 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1355 bind(profile_continue);
1356 }
1357 }
1358
1359 void InterpreterMacroAssembler::profile_call(Register mdp) {
1360 if (ProfileInterpreter) {
1361 Label profile_continue;
1362
1363 // If no method data exists, go to profile_continue.
1364 test_method_data_pointer(mdp, profile_continue);
1365
1366 // We are making a call. Increment the count.
1367 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1368
1369 // The method data pointer needs to be updated to reflect the new target.
1370 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1371 bind(profile_continue);
1372 }
1373 }
1374
1397 Register reg2,
1398 bool receiver_can_be_null) {
1399 if (ProfileInterpreter) {
1400 Label profile_continue;
1401
1402 // If no method data exists, go to profile_continue.
1403 test_method_data_pointer(mdp, profile_continue);
1404
1405 Label skip_receiver_profile;
1406 if (receiver_can_be_null) {
1407 Label not_null;
1408 testptr(receiver, receiver);
1409 jccb(Assembler::notZero, not_null);
1410 // We are making a call. Increment the count for null receiver.
1411 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1412 jmp(skip_receiver_profile);
1413 bind(not_null);
1414 }
1415
1416 // Record the receiver type.
1417 record_klass_in_profile(receiver, mdp, reg2, true);
1418 bind(skip_receiver_profile);
1419
1420 // The method data pointer needs to be updated to reflect the new target.
1421 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1422 bind(profile_continue);
1423 }
1424 }
1425
1426 // This routine creates a state machine for updating the multi-row
1427 // type profile at a virtual call site (or other type-sensitive bytecode).
1428 // The machine visits each row (of receiver/count) until the receiver type
1429 // is found, or until it runs out of rows. At the same time, it remembers
1430 // the location of the first empty row. (An empty row records null for its
1431 // receiver, and can be allocated for a newly-observed receiver type.)
1432 // Because there are two degrees of freedom in the state, a simple linear
1433 // search will not work; it must be a decision tree. Hence this helper
1434 // function is recursive, to generate the required tree structured code.
1435 // It's the interpreter, so we are trading off code space for speed.
1436 // See below for example code.
1437 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1438 Register receiver, Register mdp,
1439 Register reg2, int start_row,
1440 Label& done, bool is_virtual_call) {
1441 if (TypeProfileWidth == 0) {
1442 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1443 } else {
1444 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1445 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset);
1446 }
1447 }
1448
1449 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, Register reg2, int start_row,
1450 Label& done, int total_rows,
1451 OffsetFunction item_offset_fn,
1452 OffsetFunction item_count_offset_fn) {
1453 int last_row = total_rows - 1;
1454 assert(start_row <= last_row, "must be work left to do");
1455 // Test this row for both the item and for null.
1456 // Take any of three different outcomes:
1457 // 1. found item => increment count and goto done
1458 // 2. found null => keep looking for case 1, maybe allocate this cell
1459 // 3. found something else => keep looking for cases 1 and 2
1460 // Case 3 is handled by a recursive call.
1524 // // inner copy of decision tree, rooted at row[1]
1525 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1526 // if (row[1].rec != nullptr) {
1527 // // degenerate decision tree, rooted at row[2]
1528 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1529 // if (row[2].rec != nullptr) { count.incr(); goto done; } // overflow
1530 // row[2].init(rec); goto done;
1531 // } else {
1532 // // remember row[1] is empty
1533 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1534 // row[1].init(rec); goto done;
1535 // }
1536 // } else {
1537 // // remember row[0] is empty
1538 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1539 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1540 // row[0].init(rec); goto done;
1541 // }
1542 // done:
1543
1544 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1545 Register mdp, Register reg2,
1546 bool is_virtual_call) {
1547 assert(ProfileInterpreter, "must be profiling");
1548 Label done;
1549
1550 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1551
1552 bind (done);
1553 }
1554
1555 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1556 Register mdp) {
1557 if (ProfileInterpreter) {
1558 Label profile_continue;
1559 uint row;
1560
1561 // If no method data exists, go to profile_continue.
1562 test_method_data_pointer(mdp, profile_continue);
1563
1564 // Update the total ret count.
1565 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1566
1567 for (row = 0; row < RetData::row_limit(); row++) {
1568 Label next_test;
1569
1570 // See if return_bci is equal to bci[n]:
1607 update_mdp_by_constant(mdp, mdp_delta);
1608
1609 bind(profile_continue);
1610 }
1611 }
1612
1613
1614 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1615 if (ProfileInterpreter) {
1616 Label profile_continue;
1617
1618 // If no method data exists, go to profile_continue.
1619 test_method_data_pointer(mdp, profile_continue);
1620
1621 // The method data pointer needs to be updated.
1622 int mdp_delta = in_bytes(BitData::bit_data_size());
1623 if (TypeProfileCasts) {
1624 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1625
1626 // Record the object type.
1627 record_klass_in_profile(klass, mdp, reg2, false);
1628 }
1629 update_mdp_by_constant(mdp, mdp_delta);
1630
1631 bind(profile_continue);
1632 }
1633 }
1634
1635
1636 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1637 if (ProfileInterpreter) {
1638 Label profile_continue;
1639
1640 // If no method data exists, go to profile_continue.
1641 test_method_data_pointer(mdp, profile_continue);
1642
1643 // Update the default case count
1644 increment_mdp_data_at(mdp,
1645 in_bytes(MultiBranchData::default_count_offset()));
1646
1647 // The method data pointer needs to be updated.
1667 // case_array_offset_in_bytes()
1668 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1669 imulptr(index, reg2); // XXX l ?
1670 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1671
1672 // Update the case count
1673 increment_mdp_data_at(mdp,
1674 index,
1675 in_bytes(MultiBranchData::relative_count_offset()));
1676
1677 // The method data pointer needs to be updated.
1678 update_mdp_by_offset(mdp,
1679 index,
1680 in_bytes(MultiBranchData::
1681 relative_displacement_offset()));
1682
1683 bind(profile_continue);
1684 }
1685 }
1686
1687
1688
1689 void InterpreterMacroAssembler::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
1690 if (state == atos) {
1691 MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
1692 }
1693 }
1694
1695
1696 // Jump if ((*counter_addr += increment) & mask) == 0
1697 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, Address mask,
1698 Register scratch, Label* where) {
1699 // This update is actually not atomic and can lose a number of updates
1700 // under heavy contention, but the alternative of using the (contended)
1701 // atomic update here penalizes profiling paths too much.
1702 movl(scratch, counter_addr);
1703 incrementl(scratch, InvocationCounter::count_increment);
1704 movl(counter_addr, scratch);
1705 andl(scratch, mask);
1706 if (where != nullptr) {
|
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.
22 *
23 */
24
25 #include "compiler/compiler_globals.hpp"
26 #include "interp_masm_x86.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "logging/log.hpp"
30 #include "oops/arrayOop.hpp"
31 #include "oops/constMethodFlags.hpp"
32 #include "oops/markWord.hpp"
33 #include "oops/methodData.hpp"
34 #include "oops/method.hpp"
35 #include "oops/inlineKlass.hpp"
36 #include "oops/resolvedFieldEntry.hpp"
37 #include "oops/resolvedIndyEntry.hpp"
38 #include "oops/resolvedMethodEntry.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "prims/jvmtiThreadState.hpp"
41 #include "runtime/basicLock.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/javaThread.hpp"
44 #include "runtime/safepointMechanism.hpp"
45 #include "runtime/sharedRuntime.hpp"
46 #include "utilities/powerOfTwo.hpp"
47
48 // Implementation of InterpreterMacroAssembler
49
50 void InterpreterMacroAssembler::jump_to_entry(address entry) {
51 assert(entry, "Entry must have been generated by now");
52 jump(RuntimeAddress(entry));
53 }
54
55 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
150 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
151 profile_obj_type(tmp, mdo_arg_addr);
152
153 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
154 addptr(mdp, to_add);
155 off_to_args += to_add;
156 }
157
158 if (MethodData::profile_return()) {
159 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
160 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
161 }
162
163 bind(done);
164
165 if (MethodData::profile_return()) {
166 // We're right after the type profile for the last
167 // argument. tmp is the number of cells left in the
168 // CallTypeData/VirtualCallTypeData to reach its end. Non null
169 // if there's a return to profile.
170 assert(SingleTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
171 shll(tmp, log2i_exact((int)DataLayout::cell_size));
172 addptr(mdp, tmp);
173 }
174 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
175 } else {
176 assert(MethodData::profile_return(), "either profile call args or call ret");
177 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
178 }
179
180 // mdp points right after the end of the
181 // CallTypeData/VirtualCallTypeData, right after the cells for the
182 // return value type if there's one
183
184 bind(profile_continue);
185 }
186 }
187
188 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
189 assert_different_registers(mdp, ret, tmp, _bcp_register);
190 if (ProfileInterpreter && MethodData::profile_return()) {
195 if (MethodData::profile_return_jsr292_only()) {
196 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
197
198 // If we don't profile all invoke bytecodes we must make sure
199 // it's a bytecode we indeed profile. We can't go back to the
200 // beginning of the ProfileData we intend to update to check its
201 // type because we're right after it and we don't known its
202 // length
203 Label do_profile;
204 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
205 jcc(Assembler::equal, do_profile);
206 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
207 jcc(Assembler::equal, do_profile);
208 get_method(tmp);
209 cmpw(Address(tmp, Method::intrinsic_id_offset()), static_cast<int>(vmIntrinsics::_compiledLambdaForm));
210 jcc(Assembler::notEqual, profile_continue);
211
212 bind(do_profile);
213 }
214
215 Address mdo_ret_addr(mdp, -in_bytes(SingleTypeEntry::size()));
216 mov(tmp, ret);
217 profile_obj_type(tmp, mdo_ret_addr);
218
219 bind(profile_continue);
220 }
221 }
222
223 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
224 if (ProfileInterpreter && MethodData::profile_parameters()) {
225 Label profile_continue;
226
227 test_method_data_pointer(mdp, profile_continue);
228
229 // Load the offset of the area within the MDO used for
230 // parameters. If it's negative we're not profiling any parameters
231 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
232 testl(tmp1, tmp1);
233 jcc(Assembler::negative, profile_continue);
234
235 // Compute a pointer to the area for parameters from the offset
567 Register cpool,
568 Register index) {
569 assert_different_registers(cpool, index);
570
571 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
572 Register resolved_klasses = cpool;
573 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset()));
574 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
575 }
576
577 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
578 // subtype of super_klass.
579 //
580 // Args:
581 // rax: superklass
582 // Rsub_klass: subklass
583 //
584 // Kills:
585 // rcx, rdi
586 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
587 Label& ok_is_subtype,
588 bool profile) {
589 assert(Rsub_klass != rax, "rax holds superklass");
590 assert(Rsub_klass != r14, "r14 holds locals");
591 assert(Rsub_klass != r13, "r13 holds bcp");
592 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
593 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
594
595 // Profile the not-null value's klass.
596 if (profile) {
597 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
598 }
599
600 // Do the check.
601 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
602 }
603
604
605 // Java Expression Stack
606
607 void InterpreterMacroAssembler::pop_ptr(Register r) {
608 pop(r);
609 }
610
611 void InterpreterMacroAssembler::push_ptr(Register r) {
612 push(r);
613 }
614
615 void InterpreterMacroAssembler::push_i(Register r) {
616 push(r);
617 }
618
872 Label unlocked, unlock, no_unlock;
873
874 #ifdef ASSERT
875 Label not_preempted;
876 cmpptr(Address(r15_thread, JavaThread::preempt_alternate_return_offset()), NULL_WORD);
877 jcc(Assembler::equal, not_preempted);
878 stop("remove_activation: should not have alternate return address set");
879 bind(not_preempted);
880 #endif /* ASSERT */
881
882 const Register rthread = r15_thread;
883 const Register robj = c_rarg1;
884 const Register rmon = c_rarg1;
885
886 // get the value of _do_not_unlock_if_synchronized into rdx
887 const Address do_not_unlock_if_synchronized(rthread,
888 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
889 movbool(rbx, do_not_unlock_if_synchronized);
890 movbool(do_not_unlock_if_synchronized, false); // reset the flag
891
892 // get method access flags
893 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
894 load_unsigned_short(rcx, Address(rcx, Method::access_flags_offset()));
895 testl(rcx, JVM_ACC_SYNCHRONIZED);
896 jcc(Assembler::zero, unlocked);
897
898 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
899 // is set.
900 testbool(rbx);
901 jcc(Assembler::notZero, no_unlock);
902
903 // unlock monitor
904 push(state); // save result
905
906 // BasicObjectLock will be first in list, since this is a
907 // synchronized method. However, need to check that the object has
908 // not been unlocked by an explicit monitorexit bytecode.
909 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
910 wordSize - (int) sizeof(BasicObjectLock));
911 // We use c_rarg1/rdx so that if we go slow path it will be the correct
912 // register for unlock_object to pass to VM directly
1011 // the stack, will call InterpreterRuntime::at_unwind.
1012 Label slow_path;
1013 Label fast_path;
1014 safepoint_poll(slow_path, true /* at_return */, false /* in_nmethod */);
1015 jmp(fast_path);
1016 bind(slow_path);
1017 push(state);
1018 set_last_Java_frame(noreg, rbp, (address)pc(), rscratch1);
1019 super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), r15_thread);
1020 reset_last_Java_frame(true);
1021 pop(state);
1022 bind(fast_path);
1023
1024 // JVMTI support. Make sure the safepoint poll test is issued prior.
1025 if (notify_jvmdi) {
1026 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1027 } else {
1028 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1029 }
1030
1031 if (StackReservedPages > 0) {
1032 movptr(rbx,
1033 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1034 // testing if reserved zone needs to be re-enabled
1035 Register rthread = r15_thread;
1036 Label no_reserved_zone_enabling;
1037
1038 // check if already enabled - if so no re-enabling needed
1039 assert(sizeof(StackOverflow::StackGuardState) == 4, "unexpected size");
1040 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), StackOverflow::stack_guard_enabled);
1041 jcc(Assembler::equal, no_reserved_zone_enabling);
1042
1043 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1044 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1045
1046 JFR_ONLY(leave_jfr_critical_section();)
1047
1048 call_VM_leaf(
1049 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1050 call_VM(noreg, CAST_FROM_FN_PTR(address,
1051 InterpreterRuntime::throw_delayed_StackOverflowError));
1052 should_not_reach_here();
1053
1054 bind(no_reserved_zone_enabling);
1055 }
1056
1057 // remove activation
1058 // get sender sp
1059 movptr(rbx,
1060 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1061
1062 if (state == atos && InlineTypeReturnedAsFields) {
1063 Label skip;
1064 Label not_null;
1065 testptr(rax, rax);
1066 jcc(Assembler::notZero, not_null);
1067 // Returned value is null, zero all return registers because they may belong to oop fields
1068 xorq(j_rarg1, j_rarg1);
1069 xorq(j_rarg2, j_rarg2);
1070 xorq(j_rarg3, j_rarg3);
1071 xorq(j_rarg4, j_rarg4);
1072 xorq(j_rarg5, j_rarg5);
1073 jmp(skip);
1074 bind(not_null);
1075
1076 // Check if we are returning an non-null inline type and load its fields into registers
1077 test_oop_is_not_inline_type(rax, rscratch1, skip, /* can_be_null= */ false);
1078
1079 #ifndef _LP64
1080 super_call_VM_leaf(StubRoutines::load_inline_type_fields_in_regs());
1081 #else
1082 // Load fields from a buffered value with an inline class specific handler
1083 load_klass(rdi, rax, rscratch1);
1084 movptr(rdi, Address(rdi, InstanceKlass::adr_inlineklass_fixed_block_offset()));
1085 movptr(rdi, Address(rdi, InlineKlass::unpack_handler_offset()));
1086 // Unpack handler can be null if inline type is not scalarizable in returns
1087 testptr(rdi, rdi);
1088 jcc(Assembler::zero, skip);
1089 call(rdi);
1090 #endif
1091 #ifdef ASSERT
1092 // TODO 8284443 Enable
1093 if (StressCallingConvention && false) {
1094 Label skip_stress;
1095 movptr(rscratch1, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
1096 movl(rscratch1, Address(rscratch1, Method::flags_offset()));
1097 testl(rcx, MethodFlags::has_scalarized_return_flag());
1098 jcc(Assembler::zero, skip_stress);
1099 load_klass(rax, rax, rscratch1);
1100 orptr(rax, 1);
1101 bind(skip_stress);
1102 }
1103 #endif
1104 // call above kills the value in rbx. Reload it.
1105 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1106 bind(skip);
1107 }
1108
1109 leave(); // remove frame anchor
1110
1111 JFR_ONLY(leave_jfr_critical_section();)
1112
1113 pop(ret_addr); // get return address
1114 mov(rsp, rbx); // set sp to sender sp
1115 pop_cont_fastpath();
1116
1117 }
1118
1119 #if INCLUDE_JFR
1120 void InterpreterMacroAssembler::enter_jfr_critical_section() {
1121 const Address sampling_critical_section(r15_thread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
1122 movbool(sampling_critical_section, true);
1123 }
1124
1125 void InterpreterMacroAssembler::leave_jfr_critical_section() {
1126 const Address sampling_critical_section(r15_thread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
1127 movbool(sampling_critical_section, false);
1128 }
1129 #endif // INCLUDE_JFR
1130
1131 void InterpreterMacroAssembler::get_method_counters(Register method,
1132 Register mcs, Label& skip) {
1133 Label has_counters;
1134 movptr(mcs, Address(method, Method::method_counters_offset()));
1135 testptr(mcs, mcs);
1136 jcc(Assembler::notZero, has_counters);
1137 call_VM(noreg, CAST_FROM_FN_PTR(address,
1138 InterpreterRuntime::build_method_counters), method);
1139 movptr(mcs, Address(method,Method::method_counters_offset()));
1140 testptr(mcs, mcs);
1141 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1142 bind(has_counters);
1143 }
1144
1145 void InterpreterMacroAssembler::allocate_instance(Register klass, Register new_obj,
1146 Register t1, Register t2,
1147 bool clear_fields, Label& alloc_failed) {
1148 MacroAssembler::allocate_instance(klass, new_obj, t1, t2, clear_fields, alloc_failed);
1149 if (DTraceAllocProbes) {
1150 // Trigger dtrace event for fastpath
1151 push(atos);
1152 call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), new_obj);
1153 pop(atos);
1154 }
1155 }
1156
1157 void InterpreterMacroAssembler::read_flat_field(Register entry, Register tmp1, Register tmp2, Register obj) {
1158 Label alloc_failed, slow_path, done;
1159 const Register alloc_temp = LP64_ONLY(rscratch1) NOT_LP64(rsi);
1160 const Register dst_temp = LP64_ONLY(rscratch2) NOT_LP64(rdi);
1161 assert_different_registers(obj, entry, tmp1, tmp2, dst_temp, r8, r9);
1162
1163 // If the field is nullable, jump to slow path
1164 load_unsigned_byte(tmp1, Address(entry, in_bytes(ResolvedFieldEntry::flags_offset())));
1165 testl(tmp1, 1 << ResolvedFieldEntry::is_null_free_inline_type_shift);
1166 jcc(Assembler::equal, slow_path);
1167
1168 // Grap the inline field klass
1169 const Register field_klass = tmp1;
1170 load_unsigned_short(tmp2, Address(entry, in_bytes(ResolvedFieldEntry::field_index_offset())));
1171
1172 movptr(tmp1, Address(entry, ResolvedFieldEntry::field_holder_offset()));
1173 get_inline_type_field_klass(tmp1, tmp2, field_klass);
1174
1175 // allocate buffer
1176 push(obj); // push object being read from
1177 allocate_instance(field_klass, obj, alloc_temp, dst_temp, false, alloc_failed);
1178
1179 // Have an oop instance buffer, copy into it
1180 load_unsigned_short(r9, Address(entry, in_bytes(ResolvedFieldEntry::field_index_offset())));
1181 movptr(r8, Address(entry, in_bytes(ResolvedFieldEntry::field_holder_offset())));
1182 inline_layout_info(r8, r9, r8); // holder, index, info => InlineLayoutInfo into r8
1183
1184 payload_addr(obj, dst_temp, field_klass);
1185 pop(alloc_temp); // restore object being read from
1186 load_sized_value(tmp2, Address(entry, in_bytes(ResolvedFieldEntry::field_offset_offset())), sizeof(int), true /*is_signed*/);
1187 lea(tmp2, Address(alloc_temp, tmp2));
1188 // call_VM_leaf, clobbers a few regs, save restore new obj
1189 push(obj);
1190 flat_field_copy(IS_DEST_UNINITIALIZED, tmp2, dst_temp, r8);
1191 pop(obj);
1192 jmp(done);
1193
1194 bind(alloc_failed);
1195 pop(obj);
1196 bind(slow_path);
1197 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flat_field),
1198 obj, entry);
1199 get_vm_result_oop(obj);
1200 bind(done);
1201 }
1202
1203 void InterpreterMacroAssembler::write_flat_field(Register entry, Register tmp1, Register tmp2,
1204 Register obj, Register off, Register value) {
1205 assert_different_registers(entry, tmp1, tmp2, obj, off, value);
1206
1207 Label slow_path, done;
1208
1209 load_unsigned_byte(tmp2, Address(entry, in_bytes(ResolvedFieldEntry::flags_offset())));
1210 test_field_is_not_null_free_inline_type(tmp2, tmp1, slow_path);
1211
1212 null_check(value); // FIXME JDK-8341120
1213
1214 lea(obj, Address(obj, off, Address::times_1));
1215
1216 load_klass(tmp2, value, tmp1);
1217 payload_addr(value, value, tmp2);
1218
1219 Register idx = tmp1;
1220 load_unsigned_short(idx, Address(entry, in_bytes(ResolvedFieldEntry::field_index_offset())));
1221 movptr(tmp2, Address(entry, in_bytes(ResolvedFieldEntry::field_holder_offset())));
1222
1223 Register layout_info = off;
1224 inline_layout_info(tmp2, idx, layout_info);
1225
1226 flat_field_copy(IN_HEAP, value, obj, layout_info);
1227 jmp(done);
1228
1229 bind(slow_path);
1230 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flat_field), obj, value, entry);
1231
1232 bind(done);
1233 }
1234
1235 // Lock object
1236 //
1237 // Args:
1238 // rdx, c_rarg1: BasicObjectLock to be used for locking
1239 //
1240 // Kills:
1241 // rax, rbx
1242 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1243 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1");
1244
1245 Label done, slow_case;
1246
1247 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1248 const Register tmp_reg = rbx;
1249 const Register obj_reg = c_rarg3; // Will contain the oop
1250
1251 // Load object pointer into obj_reg
1252 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset()));
1253
1466 }
1467
1468
1469 void InterpreterMacroAssembler::profile_taken_branch(Register mdp) {
1470 if (ProfileInterpreter) {
1471 Label profile_continue;
1472
1473 // If no method data exists, go to profile_continue.
1474 test_method_data_pointer(mdp, profile_continue);
1475
1476 // We are taking a branch. Increment the taken count.
1477 increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1478
1479 // The method data pointer needs to be updated to reflect the new target.
1480 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1481 bind(profile_continue);
1482 }
1483 }
1484
1485
1486 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp, bool acmp) {
1487 if (ProfileInterpreter) {
1488 Label profile_continue;
1489
1490 // If no method data exists, go to profile_continue.
1491 test_method_data_pointer(mdp, profile_continue);
1492
1493 // We are not taking a branch. Increment the not taken count.
1494 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1495
1496 // The method data pointer needs to be updated to correspond to
1497 // the next bytecode
1498 update_mdp_by_constant(mdp, acmp ? in_bytes(ACmpData::acmp_data_size()): in_bytes(BranchData::branch_data_size()));
1499 bind(profile_continue);
1500 }
1501 }
1502
1503 void InterpreterMacroAssembler::profile_call(Register mdp) {
1504 if (ProfileInterpreter) {
1505 Label profile_continue;
1506
1507 // If no method data exists, go to profile_continue.
1508 test_method_data_pointer(mdp, profile_continue);
1509
1510 // We are making a call. Increment the count.
1511 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1512
1513 // The method data pointer needs to be updated to reflect the new target.
1514 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1515 bind(profile_continue);
1516 }
1517 }
1518
1541 Register reg2,
1542 bool receiver_can_be_null) {
1543 if (ProfileInterpreter) {
1544 Label profile_continue;
1545
1546 // If no method data exists, go to profile_continue.
1547 test_method_data_pointer(mdp, profile_continue);
1548
1549 Label skip_receiver_profile;
1550 if (receiver_can_be_null) {
1551 Label not_null;
1552 testptr(receiver, receiver);
1553 jccb(Assembler::notZero, not_null);
1554 // We are making a call. Increment the count for null receiver.
1555 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1556 jmp(skip_receiver_profile);
1557 bind(not_null);
1558 }
1559
1560 // Record the receiver type.
1561 record_klass_in_profile(receiver, mdp, reg2);
1562 bind(skip_receiver_profile);
1563
1564 // The method data pointer needs to be updated to reflect the new target.
1565 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1566 bind(profile_continue);
1567 }
1568 }
1569
1570 // This routine creates a state machine for updating the multi-row
1571 // type profile at a virtual call site (or other type-sensitive bytecode).
1572 // The machine visits each row (of receiver/count) until the receiver type
1573 // is found, or until it runs out of rows. At the same time, it remembers
1574 // the location of the first empty row. (An empty row records null for its
1575 // receiver, and can be allocated for a newly-observed receiver type.)
1576 // Because there are two degrees of freedom in the state, a simple linear
1577 // search will not work; it must be a decision tree. Hence this helper
1578 // function is recursive, to generate the required tree structured code.
1579 // It's the interpreter, so we are trading off code space for speed.
1580 // See below for example code.
1581 void InterpreterMacroAssembler::record_klass_in_profile_helper(Register receiver, Register mdp,
1582 Register reg2, int start_row,
1583 Label& done) {
1584 if (TypeProfileWidth == 0) {
1585 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1586 } else {
1587 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1588 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset);
1589 }
1590 }
1591
1592 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, Register reg2, int start_row,
1593 Label& done, int total_rows,
1594 OffsetFunction item_offset_fn,
1595 OffsetFunction item_count_offset_fn) {
1596 int last_row = total_rows - 1;
1597 assert(start_row <= last_row, "must be work left to do");
1598 // Test this row for both the item and for null.
1599 // Take any of three different outcomes:
1600 // 1. found item => increment count and goto done
1601 // 2. found null => keep looking for case 1, maybe allocate this cell
1602 // 3. found something else => keep looking for cases 1 and 2
1603 // Case 3 is handled by a recursive call.
1667 // // inner copy of decision tree, rooted at row[1]
1668 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1669 // if (row[1].rec != nullptr) {
1670 // // degenerate decision tree, rooted at row[2]
1671 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1672 // if (row[2].rec != nullptr) { count.incr(); goto done; } // overflow
1673 // row[2].init(rec); goto done;
1674 // } else {
1675 // // remember row[1] is empty
1676 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1677 // row[1].init(rec); goto done;
1678 // }
1679 // } else {
1680 // // remember row[0] is empty
1681 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1682 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1683 // row[0].init(rec); goto done;
1684 // }
1685 // done:
1686
1687 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, Register mdp, Register reg2) {
1688 assert(ProfileInterpreter, "must be profiling");
1689 Label done;
1690
1691 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done);
1692
1693 bind (done);
1694 }
1695
1696 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1697 Register mdp) {
1698 if (ProfileInterpreter) {
1699 Label profile_continue;
1700 uint row;
1701
1702 // If no method data exists, go to profile_continue.
1703 test_method_data_pointer(mdp, profile_continue);
1704
1705 // Update the total ret count.
1706 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1707
1708 for (row = 0; row < RetData::row_limit(); row++) {
1709 Label next_test;
1710
1711 // See if return_bci is equal to bci[n]:
1748 update_mdp_by_constant(mdp, mdp_delta);
1749
1750 bind(profile_continue);
1751 }
1752 }
1753
1754
1755 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1756 if (ProfileInterpreter) {
1757 Label profile_continue;
1758
1759 // If no method data exists, go to profile_continue.
1760 test_method_data_pointer(mdp, profile_continue);
1761
1762 // The method data pointer needs to be updated.
1763 int mdp_delta = in_bytes(BitData::bit_data_size());
1764 if (TypeProfileCasts) {
1765 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1766
1767 // Record the object type.
1768 record_klass_in_profile(klass, mdp, reg2);
1769 }
1770 update_mdp_by_constant(mdp, mdp_delta);
1771
1772 bind(profile_continue);
1773 }
1774 }
1775
1776
1777 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1778 if (ProfileInterpreter) {
1779 Label profile_continue;
1780
1781 // If no method data exists, go to profile_continue.
1782 test_method_data_pointer(mdp, profile_continue);
1783
1784 // Update the default case count
1785 increment_mdp_data_at(mdp,
1786 in_bytes(MultiBranchData::default_count_offset()));
1787
1788 // The method data pointer needs to be updated.
1808 // case_array_offset_in_bytes()
1809 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1810 imulptr(index, reg2); // XXX l ?
1811 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1812
1813 // Update the case count
1814 increment_mdp_data_at(mdp,
1815 index,
1816 in_bytes(MultiBranchData::relative_count_offset()));
1817
1818 // The method data pointer needs to be updated.
1819 update_mdp_by_offset(mdp,
1820 index,
1821 in_bytes(MultiBranchData::
1822 relative_displacement_offset()));
1823
1824 bind(profile_continue);
1825 }
1826 }
1827
1828 template <class ArrayData> void InterpreterMacroAssembler::profile_array_type(Register mdp,
1829 Register array,
1830 Register tmp) {
1831 if (ProfileInterpreter) {
1832 Label profile_continue;
1833
1834 // If no method data exists, go to profile_continue.
1835 test_method_data_pointer(mdp, profile_continue);
1836
1837 mov(tmp, array);
1838 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayData::array_offset())));
1839
1840 Label not_flat;
1841 test_non_flat_array_oop(array, tmp, not_flat);
1842
1843 set_mdp_flag_at(mdp, ArrayData::flat_array_byte_constant());
1844
1845 bind(not_flat);
1846
1847 Label not_null_free;
1848 test_non_null_free_array_oop(array, tmp, not_null_free);
1849
1850 set_mdp_flag_at(mdp, ArrayData::null_free_array_byte_constant());
1851
1852 bind(not_null_free);
1853
1854 bind(profile_continue);
1855 }
1856 }
1857
1858 template void InterpreterMacroAssembler::profile_array_type<ArrayLoadData>(Register mdp,
1859 Register array,
1860 Register tmp);
1861 template void InterpreterMacroAssembler::profile_array_type<ArrayStoreData>(Register mdp,
1862 Register array,
1863 Register tmp);
1864
1865
1866 void InterpreterMacroAssembler::profile_multiple_element_types(Register mdp, Register element, Register tmp, const Register tmp2) {
1867 if (ProfileInterpreter) {
1868 Label profile_continue;
1869
1870 // If no method data exists, go to profile_continue.
1871 test_method_data_pointer(mdp, profile_continue);
1872
1873 Label done, update;
1874 testptr(element, element);
1875 jccb(Assembler::notZero, update);
1876 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1877 jmp(done);
1878
1879 bind(update);
1880 load_klass(tmp, element, rscratch1);
1881
1882 // Record the object type.
1883 record_klass_in_profile(tmp, mdp, tmp2);
1884
1885 bind(done);
1886
1887 // The method data pointer needs to be updated.
1888 update_mdp_by_constant(mdp, in_bytes(ArrayStoreData::array_store_data_size()));
1889
1890 bind(profile_continue);
1891 }
1892 }
1893
1894 void InterpreterMacroAssembler::profile_element_type(Register mdp,
1895 Register element,
1896 Register tmp) {
1897 if (ProfileInterpreter) {
1898 Label profile_continue;
1899
1900 // If no method data exists, go to profile_continue.
1901 test_method_data_pointer(mdp, profile_continue);
1902
1903 mov(tmp, element);
1904 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayLoadData::element_offset())));
1905
1906 // The method data pointer needs to be updated.
1907 update_mdp_by_constant(mdp, in_bytes(ArrayLoadData::array_load_data_size()));
1908
1909 bind(profile_continue);
1910 }
1911 }
1912
1913 void InterpreterMacroAssembler::profile_acmp(Register mdp,
1914 Register left,
1915 Register right,
1916 Register tmp) {
1917 if (ProfileInterpreter) {
1918 Label profile_continue;
1919
1920 // If no method data exists, go to profile_continue.
1921 test_method_data_pointer(mdp, profile_continue);
1922
1923 mov(tmp, left);
1924 profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::left_offset())));
1925
1926 Label left_not_inline_type;
1927 test_oop_is_not_inline_type(left, tmp, left_not_inline_type);
1928 set_mdp_flag_at(mdp, ACmpData::left_inline_type_byte_constant());
1929 bind(left_not_inline_type);
1930
1931 mov(tmp, right);
1932 profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::right_offset())));
1933
1934 Label right_not_inline_type;
1935 test_oop_is_not_inline_type(right, tmp, right_not_inline_type);
1936 set_mdp_flag_at(mdp, ACmpData::right_inline_type_byte_constant());
1937 bind(right_not_inline_type);
1938
1939 bind(profile_continue);
1940 }
1941 }
1942
1943
1944 void InterpreterMacroAssembler::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
1945 if (state == atos) {
1946 MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
1947 }
1948 }
1949
1950
1951 // Jump if ((*counter_addr += increment) & mask) == 0
1952 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, Address mask,
1953 Register scratch, Label* where) {
1954 // This update is actually not atomic and can lose a number of updates
1955 // under heavy contention, but the alternative of using the (contended)
1956 // atomic update here penalizes profiling paths too much.
1957 movl(scratch, counter_addr);
1958 incrementl(scratch, InvocationCounter::count_increment);
1959 movl(counter_addr, scratch);
1960 andl(scratch, mask);
1961 if (where != nullptr) {
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