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
499 Register cpool,
500 Register index) {
501 assert_different_registers(cpool, index);
502
503 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
504 Register resolved_klasses = cpool;
505 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset()));
506 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
507 }
508
509 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
510 // subtype of super_klass.
511 //
512 // Args:
513 // rax: superklass
514 // Rsub_klass: subklass
515 //
516 // Kills:
517 // rcx, rdi
518 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
519 Label& ok_is_subtype) {
520 assert(Rsub_klass != rax, "rax holds superklass");
521 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
522 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
523 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
524 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
525
526 // Profile the not-null value's klass.
527 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
528
529 // Do the check.
530 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
531 }
532
533
534 // Java Expression Stack
535
536 void InterpreterMacroAssembler::pop_ptr(Register r) {
537 pop(r);
538 }
539
540 void InterpreterMacroAssembler::push_ptr(Register r) {
541 push(r);
542 }
543
544 void InterpreterMacroAssembler::push_i(Register r) {
545 push(r);
546 }
547
793 // no error processing
794 void InterpreterMacroAssembler::remove_activation(TosState state,
795 Register ret_addr,
796 bool throw_monitor_exception,
797 bool install_monitor_exception,
798 bool notify_jvmdi) {
799 // Note: Registers rdx xmm0 may be in use for the
800 // result check if synchronized method
801 Label unlocked, unlock, no_unlock;
802
803 const Register rthread = r15_thread;
804 const Register robj = c_rarg1;
805 const Register rmon = c_rarg1;
806
807 // get the value of _do_not_unlock_if_synchronized into rdx
808 const Address do_not_unlock_if_synchronized(rthread,
809 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
810 movbool(rbx, do_not_unlock_if_synchronized);
811 movbool(do_not_unlock_if_synchronized, false); // reset the flag
812
813 // get method access flags
814 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
815 load_unsigned_short(rcx, Address(rcx, Method::access_flags_offset()));
816 testl(rcx, JVM_ACC_SYNCHRONIZED);
817 jcc(Assembler::zero, unlocked);
818
819 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
820 // is set.
821 testbool(rbx);
822 jcc(Assembler::notZero, no_unlock);
823
824 // unlock monitor
825 push(state); // save result
826
827 // BasicObjectLock will be first in list, since this is a
828 // synchronized method. However, need to check that the object has
829 // not been unlocked by an explicit monitorexit bytecode.
830 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
831 wordSize - (int) sizeof(BasicObjectLock));
832 // We use c_rarg1/rdx so that if we go slow path it will be the correct
833 // register for unlock_object to pass to VM directly
932 // the stack, will call InterpreterRuntime::at_unwind.
933 Label slow_path;
934 Label fast_path;
935 safepoint_poll(slow_path, true /* at_return */, false /* in_nmethod */);
936 jmp(fast_path);
937 bind(slow_path);
938 push(state);
939 set_last_Java_frame(noreg, rbp, (address)pc(), rscratch1);
940 super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), r15_thread);
941 reset_last_Java_frame(true);
942 pop(state);
943 bind(fast_path);
944
945 // JVMTI support. Make sure the safepoint poll test is issued prior.
946 if (notify_jvmdi) {
947 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
948 } else {
949 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
950 }
951
952 // remove activation
953 // get sender sp
954 movptr(rbx,
955 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
956 if (StackReservedPages > 0) {
957 // testing if reserved zone needs to be re-enabled
958 Register rthread = r15_thread;
959 Label no_reserved_zone_enabling;
960
961 // check if already enabled - if so no re-enabling needed
962 assert(sizeof(StackOverflow::StackGuardState) == 4, "unexpected size");
963 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), StackOverflow::stack_guard_enabled);
964 jcc(Assembler::equal, no_reserved_zone_enabling);
965
966 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
967 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
968
969 JFR_ONLY(leave_jfr_critical_section();)
970
971 call_VM_leaf(
972 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
973 call_VM(noreg, CAST_FROM_FN_PTR(address,
974 InterpreterRuntime::throw_delayed_StackOverflowError));
975 should_not_reach_here();
976
977 bind(no_reserved_zone_enabling);
978 }
979
980 leave(); // remove frame anchor
981
982 JFR_ONLY(leave_jfr_critical_section();)
983
984 pop(ret_addr); // get return address
985 mov(rsp, rbx); // set sp to sender sp
986 pop_cont_fastpath();
987
988 }
989
990 #if INCLUDE_JFR
991 void InterpreterMacroAssembler::enter_jfr_critical_section() {
992 const Address sampling_critical_section(r15_thread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
993 movbool(sampling_critical_section, true);
994 }
995
996 void InterpreterMacroAssembler::leave_jfr_critical_section() {
997 const Address sampling_critical_section(r15_thread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
998 movbool(sampling_critical_section, false);
999 }
1000 #endif // INCLUDE_JFR
1001
1002 void InterpreterMacroAssembler::get_method_counters(Register method,
1003 Register mcs, Label& skip) {
1004 Label has_counters;
1005 movptr(mcs, Address(method, Method::method_counters_offset()));
1006 testptr(mcs, mcs);
1007 jcc(Assembler::notZero, has_counters);
1008 call_VM(noreg, CAST_FROM_FN_PTR(address,
1009 InterpreterRuntime::build_method_counters), method);
1010 movptr(mcs, Address(method,Method::method_counters_offset()));
1011 testptr(mcs, mcs);
1012 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1013 bind(has_counters);
1014 }
1015
1016
1017 // Lock object
1018 //
1019 // Args:
1020 // rdx, c_rarg1: BasicObjectLock to be used for locking
1021 //
1022 // Kills:
1023 // rax, rbx
1024 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1025 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1");
1026
1027 Label done, slow_case;
1028
1029 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1030 const Register tmp_reg = rbx;
1031 const Register obj_reg = c_rarg3; // Will contain the oop
1032
1033 // Load object pointer into obj_reg
1034 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset()));
1035
1248 }
1249
1250
1251 void InterpreterMacroAssembler::profile_taken_branch(Register mdp) {
1252 if (ProfileInterpreter) {
1253 Label profile_continue;
1254
1255 // If no method data exists, go to profile_continue.
1256 test_method_data_pointer(mdp, profile_continue);
1257
1258 // We are taking a branch. Increment the taken count.
1259 increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1260
1261 // The method data pointer needs to be updated to reflect the new target.
1262 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1263 bind(profile_continue);
1264 }
1265 }
1266
1267
1268 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1269 if (ProfileInterpreter) {
1270 Label profile_continue;
1271
1272 // If no method data exists, go to profile_continue.
1273 test_method_data_pointer(mdp, profile_continue);
1274
1275 // We are not taking a branch. Increment the not taken count.
1276 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1277
1278 // The method data pointer needs to be updated to correspond to
1279 // the next bytecode
1280 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1281 bind(profile_continue);
1282 }
1283 }
1284
1285 void InterpreterMacroAssembler::profile_call(Register mdp) {
1286 if (ProfileInterpreter) {
1287 Label profile_continue;
1288
1289 // If no method data exists, go to profile_continue.
1290 test_method_data_pointer(mdp, profile_continue);
1291
1292 // We are making a call. Increment the count.
1293 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1294
1295 // The method data pointer needs to be updated to reflect the new target.
1296 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1297 bind(profile_continue);
1298 }
1299 }
1300
1323 Register reg2,
1324 bool receiver_can_be_null) {
1325 if (ProfileInterpreter) {
1326 Label profile_continue;
1327
1328 // If no method data exists, go to profile_continue.
1329 test_method_data_pointer(mdp, profile_continue);
1330
1331 Label skip_receiver_profile;
1332 if (receiver_can_be_null) {
1333 Label not_null;
1334 testptr(receiver, receiver);
1335 jccb(Assembler::notZero, not_null);
1336 // We are making a call. Increment the count for null receiver.
1337 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1338 jmp(skip_receiver_profile);
1339 bind(not_null);
1340 }
1341
1342 // Record the receiver type.
1343 record_klass_in_profile(receiver, mdp, reg2, true);
1344 bind(skip_receiver_profile);
1345
1346 // The method data pointer needs to be updated to reflect the new target.
1347 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1348 bind(profile_continue);
1349 }
1350 }
1351
1352 // This routine creates a state machine for updating the multi-row
1353 // type profile at a virtual call site (or other type-sensitive bytecode).
1354 // The machine visits each row (of receiver/count) until the receiver type
1355 // is found, or until it runs out of rows. At the same time, it remembers
1356 // the location of the first empty row. (An empty row records null for its
1357 // receiver, and can be allocated for a newly-observed receiver type.)
1358 // Because there are two degrees of freedom in the state, a simple linear
1359 // search will not work; it must be a decision tree. Hence this helper
1360 // function is recursive, to generate the required tree structured code.
1361 // It's the interpreter, so we are trading off code space for speed.
1362 // See below for example code.
1363 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1364 Register receiver, Register mdp,
1365 Register reg2, int start_row,
1366 Label& done, bool is_virtual_call) {
1367 if (TypeProfileWidth == 0) {
1368 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1369 } else {
1370 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1371 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset);
1372 }
1373 }
1374
1375 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, Register reg2, int start_row,
1376 Label& done, int total_rows,
1377 OffsetFunction item_offset_fn,
1378 OffsetFunction item_count_offset_fn) {
1379 int last_row = total_rows - 1;
1380 assert(start_row <= last_row, "must be work left to do");
1381 // Test this row for both the item and for null.
1382 // Take any of three different outcomes:
1383 // 1. found item => increment count and goto done
1384 // 2. found null => keep looking for case 1, maybe allocate this cell
1385 // 3. found something else => keep looking for cases 1 and 2
1386 // Case 3 is handled by a recursive call.
1450 // // inner copy of decision tree, rooted at row[1]
1451 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1452 // if (row[1].rec != nullptr) {
1453 // // degenerate decision tree, rooted at row[2]
1454 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1455 // if (row[2].rec != nullptr) { count.incr(); goto done; } // overflow
1456 // row[2].init(rec); goto done;
1457 // } else {
1458 // // remember row[1] is empty
1459 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1460 // row[1].init(rec); goto done;
1461 // }
1462 // } else {
1463 // // remember row[0] is empty
1464 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1465 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1466 // row[0].init(rec); goto done;
1467 // }
1468 // done:
1469
1470 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1471 Register mdp, Register reg2,
1472 bool is_virtual_call) {
1473 assert(ProfileInterpreter, "must be profiling");
1474 Label done;
1475
1476 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1477
1478 bind (done);
1479 }
1480
1481 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1482 Register mdp) {
1483 if (ProfileInterpreter) {
1484 Label profile_continue;
1485 uint row;
1486
1487 // If no method data exists, go to profile_continue.
1488 test_method_data_pointer(mdp, profile_continue);
1489
1490 // Update the total ret count.
1491 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1492
1493 for (row = 0; row < RetData::row_limit(); row++) {
1494 Label next_test;
1495
1496 // See if return_bci is equal to bci[n]:
1533 update_mdp_by_constant(mdp, mdp_delta);
1534
1535 bind(profile_continue);
1536 }
1537 }
1538
1539
1540 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1541 if (ProfileInterpreter) {
1542 Label profile_continue;
1543
1544 // If no method data exists, go to profile_continue.
1545 test_method_data_pointer(mdp, profile_continue);
1546
1547 // The method data pointer needs to be updated.
1548 int mdp_delta = in_bytes(BitData::bit_data_size());
1549 if (TypeProfileCasts) {
1550 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1551
1552 // Record the object type.
1553 record_klass_in_profile(klass, mdp, reg2, false);
1554 }
1555 update_mdp_by_constant(mdp, mdp_delta);
1556
1557 bind(profile_continue);
1558 }
1559 }
1560
1561
1562 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1563 if (ProfileInterpreter) {
1564 Label profile_continue;
1565
1566 // If no method data exists, go to profile_continue.
1567 test_method_data_pointer(mdp, profile_continue);
1568
1569 // Update the default case count
1570 increment_mdp_data_at(mdp,
1571 in_bytes(MultiBranchData::default_count_offset()));
1572
1573 // The method data pointer needs to be updated.
1593 // case_array_offset_in_bytes()
1594 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1595 imulptr(index, reg2); // XXX l ?
1596 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1597
1598 // Update the case count
1599 increment_mdp_data_at(mdp,
1600 index,
1601 in_bytes(MultiBranchData::relative_count_offset()));
1602
1603 // The method data pointer needs to be updated.
1604 update_mdp_by_offset(mdp,
1605 index,
1606 in_bytes(MultiBranchData::
1607 relative_displacement_offset()));
1608
1609 bind(profile_continue);
1610 }
1611 }
1612
1613
1614
1615 void InterpreterMacroAssembler::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
1616 if (state == atos) {
1617 MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
1618 }
1619 }
1620
1621
1622 // Jump if ((*counter_addr += increment) & mask) == 0
1623 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, Address mask,
1624 Register scratch, Label* where) {
1625 // This update is actually not atomic and can lose a number of updates
1626 // under heavy contention, but the alternative of using the (contended)
1627 // atomic update here penalizes profiling paths too much.
1628 movl(scratch, counter_addr);
1629 incrementl(scratch, InvocationCounter::count_increment);
1630 movl(counter_addr, scratch);
1631 andl(scratch, mask);
1632 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
501 Register cpool,
502 Register index) {
503 assert_different_registers(cpool, index);
504
505 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
506 Register resolved_klasses = cpool;
507 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset()));
508 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
509 }
510
511 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
512 // subtype of super_klass.
513 //
514 // Args:
515 // rax: superklass
516 // Rsub_klass: subklass
517 //
518 // Kills:
519 // rcx, rdi
520 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
521 Label& ok_is_subtype,
522 bool profile) {
523 assert(Rsub_klass != rax, "rax holds superklass");
524 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
525 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
526 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
527 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
528
529 // Profile the not-null value's klass.
530 if (profile) {
531 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
532 }
533
534 // Do the check.
535 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
536 }
537
538
539 // Java Expression Stack
540
541 void InterpreterMacroAssembler::pop_ptr(Register r) {
542 pop(r);
543 }
544
545 void InterpreterMacroAssembler::push_ptr(Register r) {
546 push(r);
547 }
548
549 void InterpreterMacroAssembler::push_i(Register r) {
550 push(r);
551 }
552
798 // no error processing
799 void InterpreterMacroAssembler::remove_activation(TosState state,
800 Register ret_addr,
801 bool throw_monitor_exception,
802 bool install_monitor_exception,
803 bool notify_jvmdi) {
804 // Note: Registers rdx xmm0 may be in use for the
805 // result check if synchronized method
806 Label unlocked, unlock, no_unlock;
807
808 const Register rthread = r15_thread;
809 const Register robj = c_rarg1;
810 const Register rmon = c_rarg1;
811
812 // get the value of _do_not_unlock_if_synchronized into rdx
813 const Address do_not_unlock_if_synchronized(rthread,
814 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
815 movbool(rbx, do_not_unlock_if_synchronized);
816 movbool(do_not_unlock_if_synchronized, false); // reset the flag
817
818 // get method access flags
819 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
820 load_unsigned_short(rcx, Address(rcx, Method::access_flags_offset()));
821 testl(rcx, JVM_ACC_SYNCHRONIZED);
822 jcc(Assembler::zero, unlocked);
823
824 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
825 // is set.
826 testbool(rbx);
827 jcc(Assembler::notZero, no_unlock);
828
829 // unlock monitor
830 push(state); // save result
831
832 // BasicObjectLock will be first in list, since this is a
833 // synchronized method. However, need to check that the object has
834 // not been unlocked by an explicit monitorexit bytecode.
835 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
836 wordSize - (int) sizeof(BasicObjectLock));
837 // We use c_rarg1/rdx so that if we go slow path it will be the correct
838 // register for unlock_object to pass to VM directly
937 // the stack, will call InterpreterRuntime::at_unwind.
938 Label slow_path;
939 Label fast_path;
940 safepoint_poll(slow_path, true /* at_return */, false /* in_nmethod */);
941 jmp(fast_path);
942 bind(slow_path);
943 push(state);
944 set_last_Java_frame(noreg, rbp, (address)pc(), rscratch1);
945 super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), r15_thread);
946 reset_last_Java_frame(true);
947 pop(state);
948 bind(fast_path);
949
950 // JVMTI support. Make sure the safepoint poll test is issued prior.
951 if (notify_jvmdi) {
952 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
953 } else {
954 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
955 }
956
957 if (StackReservedPages > 0) {
958 movptr(rbx,
959 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
960 // testing if reserved zone needs to be re-enabled
961 Register rthread = r15_thread;
962 Label no_reserved_zone_enabling;
963
964 // check if already enabled - if so no re-enabling needed
965 assert(sizeof(StackOverflow::StackGuardState) == 4, "unexpected size");
966 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), StackOverflow::stack_guard_enabled);
967 jcc(Assembler::equal, no_reserved_zone_enabling);
968
969 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
970 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
971
972 JFR_ONLY(leave_jfr_critical_section();)
973
974 call_VM_leaf(
975 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
976 call_VM(noreg, CAST_FROM_FN_PTR(address,
977 InterpreterRuntime::throw_delayed_StackOverflowError));
978 should_not_reach_here();
979
980 bind(no_reserved_zone_enabling);
981 }
982
983 // remove activation
984 // get sender sp
985 movptr(rbx,
986 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
987
988 if (state == atos && InlineTypeReturnedAsFields) {
989 Label skip;
990 Label not_null;
991 testptr(rax, rax);
992 jcc(Assembler::notZero, not_null);
993 // Returned value is null, zero all return registers because they may belong to oop fields
994 xorq(j_rarg1, j_rarg1);
995 xorq(j_rarg2, j_rarg2);
996 xorq(j_rarg3, j_rarg3);
997 xorq(j_rarg4, j_rarg4);
998 xorq(j_rarg5, j_rarg5);
999 jmp(skip);
1000 bind(not_null);
1001
1002 // Check if we are returning an non-null inline type and load its fields into registers
1003 test_oop_is_not_inline_type(rax, rscratch1, skip, /* can_be_null= */ false);
1004
1005 #ifndef _LP64
1006 super_call_VM_leaf(StubRoutines::load_inline_type_fields_in_regs());
1007 #else
1008 // Load fields from a buffered value with an inline class specific handler
1009 load_klass(rdi, rax, rscratch1);
1010 movptr(rdi, Address(rdi, InstanceKlass::adr_inlineklass_fixed_block_offset()));
1011 movptr(rdi, Address(rdi, InlineKlass::unpack_handler_offset()));
1012 // Unpack handler can be null if inline type is not scalarizable in returns
1013 testptr(rdi, rdi);
1014 jcc(Assembler::zero, skip);
1015 call(rdi);
1016 #endif
1017 #ifdef ASSERT
1018 // TODO 8284443 Enable
1019 if (StressCallingConvention && false) {
1020 Label skip_stress;
1021 movptr(rscratch1, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
1022 movl(rscratch1, Address(rscratch1, Method::flags_offset()));
1023 testl(rcx, MethodFlags::has_scalarized_return_flag());
1024 jcc(Assembler::zero, skip_stress);
1025 load_klass(rax, rax, rscratch1);
1026 orptr(rax, 1);
1027 bind(skip_stress);
1028 }
1029 #endif
1030 // call above kills the value in rbx. Reload it.
1031 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1032 bind(skip);
1033 }
1034
1035 leave(); // remove frame anchor
1036
1037 JFR_ONLY(leave_jfr_critical_section();)
1038
1039 pop(ret_addr); // get return address
1040 mov(rsp, rbx); // set sp to sender sp
1041 pop_cont_fastpath();
1042
1043 }
1044
1045 #if INCLUDE_JFR
1046 void InterpreterMacroAssembler::enter_jfr_critical_section() {
1047 const Address sampling_critical_section(r15_thread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
1048 movbool(sampling_critical_section, true);
1049 }
1050
1051 void InterpreterMacroAssembler::leave_jfr_critical_section() {
1052 const Address sampling_critical_section(r15_thread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
1053 movbool(sampling_critical_section, false);
1054 }
1055 #endif // INCLUDE_JFR
1056
1057 void InterpreterMacroAssembler::get_method_counters(Register method,
1058 Register mcs, Label& skip) {
1059 Label has_counters;
1060 movptr(mcs, Address(method, Method::method_counters_offset()));
1061 testptr(mcs, mcs);
1062 jcc(Assembler::notZero, has_counters);
1063 call_VM(noreg, CAST_FROM_FN_PTR(address,
1064 InterpreterRuntime::build_method_counters), method);
1065 movptr(mcs, Address(method,Method::method_counters_offset()));
1066 testptr(mcs, mcs);
1067 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1068 bind(has_counters);
1069 }
1070
1071 void InterpreterMacroAssembler::allocate_instance(Register klass, Register new_obj,
1072 Register t1, Register t2,
1073 bool clear_fields, Label& alloc_failed) {
1074 MacroAssembler::allocate_instance(klass, new_obj, t1, t2, clear_fields, alloc_failed);
1075 if (DTraceAllocProbes) {
1076 // Trigger dtrace event for fastpath
1077 push(atos);
1078 call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), new_obj);
1079 pop(atos);
1080 }
1081 }
1082
1083 void InterpreterMacroAssembler::read_flat_field(Register entry, Register tmp1, Register tmp2, Register obj) {
1084 Label alloc_failed, slow_path, done;
1085 const Register alloc_temp = LP64_ONLY(rscratch1) NOT_LP64(rsi);
1086 const Register dst_temp = LP64_ONLY(rscratch2) NOT_LP64(rdi);
1087 assert_different_registers(obj, entry, tmp1, tmp2, dst_temp, r8, r9);
1088
1089 // If the field is nullable, jump to slow path
1090 load_unsigned_byte(tmp1, Address(entry, in_bytes(ResolvedFieldEntry::flags_offset())));
1091 testl(tmp1, 1 << ResolvedFieldEntry::is_null_free_inline_type_shift);
1092 jcc(Assembler::equal, slow_path);
1093
1094 // Grap the inline field klass
1095 const Register field_klass = tmp1;
1096 load_unsigned_short(tmp2, Address(entry, in_bytes(ResolvedFieldEntry::field_index_offset())));
1097
1098 movptr(tmp1, Address(entry, ResolvedFieldEntry::field_holder_offset()));
1099 get_inline_type_field_klass(tmp1, tmp2, field_klass);
1100
1101 // allocate buffer
1102 push(obj); // push object being read from
1103 allocate_instance(field_klass, obj, alloc_temp, dst_temp, false, alloc_failed);
1104
1105 // Have an oop instance buffer, copy into it
1106 load_unsigned_short(r9, Address(entry, in_bytes(ResolvedFieldEntry::field_index_offset())));
1107 movptr(r8, Address(entry, in_bytes(ResolvedFieldEntry::field_holder_offset())));
1108 inline_layout_info(r8, r9, r8); // holder, index, info => InlineLayoutInfo into r8
1109
1110 payload_addr(obj, dst_temp, field_klass);
1111 pop(alloc_temp); // restore object being read from
1112 load_sized_value(tmp2, Address(entry, in_bytes(ResolvedFieldEntry::field_offset_offset())), sizeof(int), true /*is_signed*/);
1113 lea(tmp2, Address(alloc_temp, tmp2));
1114 // call_VM_leaf, clobbers a few regs, save restore new obj
1115 push(obj);
1116 flat_field_copy(IS_DEST_UNINITIALIZED, tmp2, dst_temp, r8);
1117 pop(obj);
1118 jmp(done);
1119
1120 bind(alloc_failed);
1121 pop(obj);
1122 bind(slow_path);
1123 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flat_field),
1124 obj, entry);
1125 get_vm_result_oop(obj);
1126 bind(done);
1127 }
1128
1129 void InterpreterMacroAssembler::write_flat_field(Register entry, Register tmp1, Register tmp2,
1130 Register obj, Register off, Register value) {
1131 assert_different_registers(entry, tmp1, tmp2, obj, off, value);
1132
1133 Label slow_path, done;
1134
1135 load_unsigned_byte(tmp2, Address(entry, in_bytes(ResolvedFieldEntry::flags_offset())));
1136 test_field_is_not_null_free_inline_type(tmp2, tmp1, slow_path);
1137
1138 null_check(value); // FIXME JDK-8341120
1139
1140 lea(obj, Address(obj, off, Address::times_1));
1141
1142 load_klass(tmp2, value, tmp1);
1143 payload_addr(value, value, tmp2);
1144
1145 Register idx = tmp1;
1146 load_unsigned_short(idx, Address(entry, in_bytes(ResolvedFieldEntry::field_index_offset())));
1147 movptr(tmp2, Address(entry, in_bytes(ResolvedFieldEntry::field_holder_offset())));
1148
1149 Register layout_info = off;
1150 inline_layout_info(tmp2, idx, layout_info);
1151
1152 flat_field_copy(IN_HEAP, value, obj, layout_info);
1153 jmp(done);
1154
1155 bind(slow_path);
1156 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flat_field), obj, value, entry);
1157
1158 bind(done);
1159 }
1160
1161 // Lock object
1162 //
1163 // Args:
1164 // rdx, c_rarg1: BasicObjectLock to be used for locking
1165 //
1166 // Kills:
1167 // rax, rbx
1168 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1169 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1");
1170
1171 Label done, slow_case;
1172
1173 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1174 const Register tmp_reg = rbx;
1175 const Register obj_reg = c_rarg3; // Will contain the oop
1176
1177 // Load object pointer into obj_reg
1178 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset()));
1179
1392 }
1393
1394
1395 void InterpreterMacroAssembler::profile_taken_branch(Register mdp) {
1396 if (ProfileInterpreter) {
1397 Label profile_continue;
1398
1399 // If no method data exists, go to profile_continue.
1400 test_method_data_pointer(mdp, profile_continue);
1401
1402 // We are taking a branch. Increment the taken count.
1403 increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1404
1405 // The method data pointer needs to be updated to reflect the new target.
1406 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1407 bind(profile_continue);
1408 }
1409 }
1410
1411
1412 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp, bool acmp) {
1413 if (ProfileInterpreter) {
1414 Label profile_continue;
1415
1416 // If no method data exists, go to profile_continue.
1417 test_method_data_pointer(mdp, profile_continue);
1418
1419 // We are not taking a branch. Increment the not taken count.
1420 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1421
1422 // The method data pointer needs to be updated to correspond to
1423 // the next bytecode
1424 update_mdp_by_constant(mdp, acmp ? in_bytes(ACmpData::acmp_data_size()): in_bytes(BranchData::branch_data_size()));
1425 bind(profile_continue);
1426 }
1427 }
1428
1429 void InterpreterMacroAssembler::profile_call(Register mdp) {
1430 if (ProfileInterpreter) {
1431 Label profile_continue;
1432
1433 // If no method data exists, go to profile_continue.
1434 test_method_data_pointer(mdp, profile_continue);
1435
1436 // We are making a call. Increment the count.
1437 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1438
1439 // The method data pointer needs to be updated to reflect the new target.
1440 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1441 bind(profile_continue);
1442 }
1443 }
1444
1467 Register reg2,
1468 bool receiver_can_be_null) {
1469 if (ProfileInterpreter) {
1470 Label profile_continue;
1471
1472 // If no method data exists, go to profile_continue.
1473 test_method_data_pointer(mdp, profile_continue);
1474
1475 Label skip_receiver_profile;
1476 if (receiver_can_be_null) {
1477 Label not_null;
1478 testptr(receiver, receiver);
1479 jccb(Assembler::notZero, not_null);
1480 // We are making a call. Increment the count for null receiver.
1481 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1482 jmp(skip_receiver_profile);
1483 bind(not_null);
1484 }
1485
1486 // Record the receiver type.
1487 record_klass_in_profile(receiver, mdp, reg2);
1488 bind(skip_receiver_profile);
1489
1490 // The method data pointer needs to be updated to reflect the new target.
1491 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1492 bind(profile_continue);
1493 }
1494 }
1495
1496 // This routine creates a state machine for updating the multi-row
1497 // type profile at a virtual call site (or other type-sensitive bytecode).
1498 // The machine visits each row (of receiver/count) until the receiver type
1499 // is found, or until it runs out of rows. At the same time, it remembers
1500 // the location of the first empty row. (An empty row records null for its
1501 // receiver, and can be allocated for a newly-observed receiver type.)
1502 // Because there are two degrees of freedom in the state, a simple linear
1503 // search will not work; it must be a decision tree. Hence this helper
1504 // function is recursive, to generate the required tree structured code.
1505 // It's the interpreter, so we are trading off code space for speed.
1506 // See below for example code.
1507 void InterpreterMacroAssembler::record_klass_in_profile_helper(Register receiver, Register mdp,
1508 Register reg2, int start_row,
1509 Label& done) {
1510 if (TypeProfileWidth == 0) {
1511 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1512 } else {
1513 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1514 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset);
1515 }
1516 }
1517
1518 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, Register reg2, int start_row,
1519 Label& done, int total_rows,
1520 OffsetFunction item_offset_fn,
1521 OffsetFunction item_count_offset_fn) {
1522 int last_row = total_rows - 1;
1523 assert(start_row <= last_row, "must be work left to do");
1524 // Test this row for both the item and for null.
1525 // Take any of three different outcomes:
1526 // 1. found item => increment count and goto done
1527 // 2. found null => keep looking for case 1, maybe allocate this cell
1528 // 3. found something else => keep looking for cases 1 and 2
1529 // Case 3 is handled by a recursive call.
1593 // // inner copy of decision tree, rooted at row[1]
1594 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1595 // if (row[1].rec != nullptr) {
1596 // // degenerate decision tree, rooted at row[2]
1597 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1598 // if (row[2].rec != nullptr) { count.incr(); goto done; } // overflow
1599 // row[2].init(rec); goto done;
1600 // } else {
1601 // // remember row[1] is empty
1602 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1603 // row[1].init(rec); goto done;
1604 // }
1605 // } else {
1606 // // remember row[0] is empty
1607 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1608 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1609 // row[0].init(rec); goto done;
1610 // }
1611 // done:
1612
1613 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, Register mdp, Register reg2) {
1614 assert(ProfileInterpreter, "must be profiling");
1615 Label done;
1616
1617 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done);
1618
1619 bind (done);
1620 }
1621
1622 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1623 Register mdp) {
1624 if (ProfileInterpreter) {
1625 Label profile_continue;
1626 uint row;
1627
1628 // If no method data exists, go to profile_continue.
1629 test_method_data_pointer(mdp, profile_continue);
1630
1631 // Update the total ret count.
1632 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1633
1634 for (row = 0; row < RetData::row_limit(); row++) {
1635 Label next_test;
1636
1637 // See if return_bci is equal to bci[n]:
1674 update_mdp_by_constant(mdp, mdp_delta);
1675
1676 bind(profile_continue);
1677 }
1678 }
1679
1680
1681 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1682 if (ProfileInterpreter) {
1683 Label profile_continue;
1684
1685 // If no method data exists, go to profile_continue.
1686 test_method_data_pointer(mdp, profile_continue);
1687
1688 // The method data pointer needs to be updated.
1689 int mdp_delta = in_bytes(BitData::bit_data_size());
1690 if (TypeProfileCasts) {
1691 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1692
1693 // Record the object type.
1694 record_klass_in_profile(klass, mdp, reg2);
1695 }
1696 update_mdp_by_constant(mdp, mdp_delta);
1697
1698 bind(profile_continue);
1699 }
1700 }
1701
1702
1703 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1704 if (ProfileInterpreter) {
1705 Label profile_continue;
1706
1707 // If no method data exists, go to profile_continue.
1708 test_method_data_pointer(mdp, profile_continue);
1709
1710 // Update the default case count
1711 increment_mdp_data_at(mdp,
1712 in_bytes(MultiBranchData::default_count_offset()));
1713
1714 // The method data pointer needs to be updated.
1734 // case_array_offset_in_bytes()
1735 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1736 imulptr(index, reg2); // XXX l ?
1737 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1738
1739 // Update the case count
1740 increment_mdp_data_at(mdp,
1741 index,
1742 in_bytes(MultiBranchData::relative_count_offset()));
1743
1744 // The method data pointer needs to be updated.
1745 update_mdp_by_offset(mdp,
1746 index,
1747 in_bytes(MultiBranchData::
1748 relative_displacement_offset()));
1749
1750 bind(profile_continue);
1751 }
1752 }
1753
1754 template <class ArrayData> void InterpreterMacroAssembler::profile_array_type(Register mdp,
1755 Register array,
1756 Register tmp) {
1757 if (ProfileInterpreter) {
1758 Label profile_continue;
1759
1760 // If no method data exists, go to profile_continue.
1761 test_method_data_pointer(mdp, profile_continue);
1762
1763 mov(tmp, array);
1764 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayData::array_offset())));
1765
1766 Label not_flat;
1767 test_non_flat_array_oop(array, tmp, not_flat);
1768
1769 set_mdp_flag_at(mdp, ArrayData::flat_array_byte_constant());
1770
1771 bind(not_flat);
1772
1773 Label not_null_free;
1774 test_non_null_free_array_oop(array, tmp, not_null_free);
1775
1776 set_mdp_flag_at(mdp, ArrayData::null_free_array_byte_constant());
1777
1778 bind(not_null_free);
1779
1780 bind(profile_continue);
1781 }
1782 }
1783
1784 template void InterpreterMacroAssembler::profile_array_type<ArrayLoadData>(Register mdp,
1785 Register array,
1786 Register tmp);
1787 template void InterpreterMacroAssembler::profile_array_type<ArrayStoreData>(Register mdp,
1788 Register array,
1789 Register tmp);
1790
1791
1792 void InterpreterMacroAssembler::profile_multiple_element_types(Register mdp, Register element, Register tmp, const Register tmp2) {
1793 if (ProfileInterpreter) {
1794 Label profile_continue;
1795
1796 // If no method data exists, go to profile_continue.
1797 test_method_data_pointer(mdp, profile_continue);
1798
1799 Label done, update;
1800 testptr(element, element);
1801 jccb(Assembler::notZero, update);
1802 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1803 jmp(done);
1804
1805 bind(update);
1806 load_klass(tmp, element, rscratch1);
1807
1808 // Record the object type.
1809 record_klass_in_profile(tmp, mdp, tmp2);
1810
1811 bind(done);
1812
1813 // The method data pointer needs to be updated.
1814 update_mdp_by_constant(mdp, in_bytes(ArrayStoreData::array_store_data_size()));
1815
1816 bind(profile_continue);
1817 }
1818 }
1819
1820 void InterpreterMacroAssembler::profile_element_type(Register mdp,
1821 Register element,
1822 Register tmp) {
1823 if (ProfileInterpreter) {
1824 Label profile_continue;
1825
1826 // If no method data exists, go to profile_continue.
1827 test_method_data_pointer(mdp, profile_continue);
1828
1829 mov(tmp, element);
1830 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayLoadData::element_offset())));
1831
1832 // The method data pointer needs to be updated.
1833 update_mdp_by_constant(mdp, in_bytes(ArrayLoadData::array_load_data_size()));
1834
1835 bind(profile_continue);
1836 }
1837 }
1838
1839 void InterpreterMacroAssembler::profile_acmp(Register mdp,
1840 Register left,
1841 Register right,
1842 Register tmp) {
1843 if (ProfileInterpreter) {
1844 Label profile_continue;
1845
1846 // If no method data exists, go to profile_continue.
1847 test_method_data_pointer(mdp, profile_continue);
1848
1849 mov(tmp, left);
1850 profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::left_offset())));
1851
1852 Label left_not_inline_type;
1853 test_oop_is_not_inline_type(left, tmp, left_not_inline_type);
1854 set_mdp_flag_at(mdp, ACmpData::left_inline_type_byte_constant());
1855 bind(left_not_inline_type);
1856
1857 mov(tmp, right);
1858 profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::right_offset())));
1859
1860 Label right_not_inline_type;
1861 test_oop_is_not_inline_type(right, tmp, right_not_inline_type);
1862 set_mdp_flag_at(mdp, ACmpData::right_inline_type_byte_constant());
1863 bind(right_not_inline_type);
1864
1865 bind(profile_continue);
1866 }
1867 }
1868
1869
1870 void InterpreterMacroAssembler::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
1871 if (state == atos) {
1872 MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
1873 }
1874 }
1875
1876
1877 // Jump if ((*counter_addr += increment) & mask) == 0
1878 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, Address mask,
1879 Register scratch, Label* where) {
1880 // This update is actually not atomic and can lose a number of updates
1881 // under heavy contention, but the alternative of using the (contended)
1882 // atomic update here penalizes profiling paths too much.
1883 movl(scratch, counter_addr);
1884 incrementl(scratch, InvocationCounter::count_increment);
1885 movl(counter_addr, scratch);
1886 andl(scratch, mask);
1887 if (where != nullptr) {
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