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src/hotspot/cpu/aarch64/interp_masm_aarch64.cpp

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  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "asm/macroAssembler.inline.hpp"
  27 #include "compiler/compiler_globals.hpp"
  28 #include "gc/shared/barrierSet.hpp"
  29 #include "gc/shared/barrierSetAssembler.hpp"
  30 #include "interp_masm_aarch64.hpp"
  31 #include "interpreter/interpreter.hpp"
  32 #include "interpreter/interpreterRuntime.hpp"
  33 #include "logging/log.hpp"
  34 #include "oops/arrayOop.hpp"

  35 #include "oops/markWord.hpp"
  36 #include "oops/method.hpp"
  37 #include "oops/methodData.hpp"

  38 #include "oops/resolvedFieldEntry.hpp"
  39 #include "oops/resolvedIndyEntry.hpp"
  40 #include "oops/resolvedMethodEntry.hpp"
  41 #include "prims/jvmtiExport.hpp"
  42 #include "prims/jvmtiThreadState.hpp"
  43 #include "runtime/basicLock.hpp"
  44 #include "runtime/frame.inline.hpp"
  45 #include "runtime/javaThread.hpp"
  46 #include "runtime/safepointMechanism.hpp"
  47 #include "runtime/sharedRuntime.hpp"
  48 #include "utilities/powerOfTwo.hpp"
  49 
  50 void InterpreterMacroAssembler::narrow(Register result) {
  51 
  52   // Get method->_constMethod->_result_type
  53   ldr(rscratch1, Address(rfp, frame::interpreter_frame_method_offset * wordSize));
  54   ldr(rscratch1, Address(rscratch1, Method::const_offset()));
  55   ldrb(rscratch1, Address(rscratch1, ConstMethod::result_type_offset()));
  56 
  57   Label done, notBool, notByte, notChar;

 191     ldrw(index, Address(rbcp, bcp_offset));
 192   } else if (index_size == sizeof(u1)) {
 193     load_unsigned_byte(index, Address(rbcp, bcp_offset));
 194   } else {
 195     ShouldNotReachHere();
 196   }
 197 }
 198 
 199 void InterpreterMacroAssembler::get_method_counters(Register method,
 200                                                     Register mcs, Label& skip) {
 201   Label has_counters;
 202   ldr(mcs, Address(method, Method::method_counters_offset()));
 203   cbnz(mcs, has_counters);
 204   call_VM(noreg, CAST_FROM_FN_PTR(address,
 205           InterpreterRuntime::build_method_counters), method);
 206   ldr(mcs, Address(method, Method::method_counters_offset()));
 207   cbz(mcs, skip); // No MethodCounters allocated, OutOfMemory
 208   bind(has_counters);
 209 }
 210 




















































 211 // Load object from cpool->resolved_references(index)
 212 void InterpreterMacroAssembler::load_resolved_reference_at_index(
 213                                            Register result, Register index, Register tmp) {
 214   assert_different_registers(result, index);
 215 
 216   get_constant_pool(result);
 217   // load pointer for resolved_references[] objArray
 218   ldr(result, Address(result, ConstantPool::cache_offset()));
 219   ldr(result, Address(result, ConstantPoolCache::resolved_references_offset()));
 220   resolve_oop_handle(result, tmp, rscratch2);
 221   // Add in the index
 222   add(index, index, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop);
 223   load_heap_oop(result, Address(result, index, Address::uxtw(LogBytesPerHeapOop)), tmp, rscratch2);
 224 }
 225 
 226 void InterpreterMacroAssembler::load_resolved_klass_at_offset(
 227                              Register cpool, Register index, Register klass, Register temp) {
 228   add(temp, cpool, index, LSL, LogBytesPerWord);
 229   ldrh(temp, Address(temp, sizeof(ConstantPool))); // temp = resolved_klass_index
 230   ldr(klass, Address(cpool,  ConstantPool::resolved_klasses_offset())); // klass = cpool->_resolved_klasses
 231   add(klass, klass, temp, LSL, LogBytesPerWord);
 232   ldr(klass, Address(klass, Array<Klass*>::base_offset_in_bytes()));
 233 }
 234 
 235 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
 236 // subtype of super_klass.
 237 //
 238 // Args:
 239 //      r0: superklass
 240 //      Rsub_klass: subklass
 241 //
 242 // Kills:
 243 //      r2, r5
 244 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
 245                                                   Label& ok_is_subtype) {

 246   assert(Rsub_klass != r0, "r0 holds superklass");
 247   assert(Rsub_klass != r2, "r2 holds 2ndary super array length");
 248   assert(Rsub_klass != r5, "r5 holds 2ndary super array scan ptr");
 249 
 250   // Profile the not-null value's klass.
 251   profile_typecheck(r2, Rsub_klass, r5); // blows r2, reloads r5


 252 
 253   // Do the check.
 254   check_klass_subtype(Rsub_klass, r0, r2, ok_is_subtype); // blows r2
 255 }
 256 
 257 // Java Expression Stack
 258 
 259 void InterpreterMacroAssembler::pop_ptr(Register r) {
 260   ldr(r, post(esp, wordSize));
 261 }
 262 
 263 void InterpreterMacroAssembler::pop_i(Register r) {
 264   ldrw(r, post(esp, wordSize));
 265 }
 266 
 267 void InterpreterMacroAssembler::pop_l(Register r) {
 268   ldr(r, post(esp, 2 * Interpreter::stackElementSize));
 269 }
 270 
 271 void InterpreterMacroAssembler::push_ptr(Register r) {

 605 
 606     add(c_rarg1, c_rarg1, entry_size); // otherwise advance to next entry
 607     bind(entry);
 608     cmp(c_rarg1, r19); // check if bottom reached
 609     br(Assembler::NE, loop); // if not at bottom then check this entry
 610   }
 611 
 612   bind(no_unlock);
 613 
 614   // jvmti support
 615   if (notify_jvmdi) {
 616     notify_method_exit(state, NotifyJVMTI);    // preserve TOSCA
 617   } else {
 618     notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
 619   }
 620 
 621   // remove activation
 622   // get sender esp
 623   ldr(rscratch2,
 624       Address(rfp, frame::interpreter_frame_sender_sp_offset * wordSize));

 625   if (StackReservedPages > 0) {
 626     // testing if reserved zone needs to be re-enabled
 627     Label no_reserved_zone_enabling;
 628 
 629     // check if already enabled - if so no re-enabling needed
 630     assert(sizeof(StackOverflow::StackGuardState) == 4, "unexpected size");
 631     ldrw(rscratch1, Address(rthread, JavaThread::stack_guard_state_offset()));
 632     cmpw(rscratch1, (u1)StackOverflow::stack_guard_enabled);
 633     br(Assembler::EQ, no_reserved_zone_enabling);
 634 
 635     // look for an overflow into the stack reserved zone, i.e.
 636     // interpreter_frame_sender_sp <= JavaThread::reserved_stack_activation
 637     ldr(rscratch1, Address(rthread, JavaThread::reserved_stack_activation_offset()));
 638     cmp(rscratch2, rscratch1);
 639     br(Assembler::LS, no_reserved_zone_enabling);
 640 
 641     call_VM_leaf(
 642       CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
 643     call_VM(noreg, CAST_FROM_FN_PTR(address,
 644                    InterpreterRuntime::throw_delayed_StackOverflowError));
 645     should_not_reach_here();
 646 
 647     bind(no_reserved_zone_enabling);
 648   }
 649 































 650   // restore sender esp
 651   mov(esp, rscratch2);
 652   // remove frame anchor
 653   leave();
 654   // If we're returning to interpreted code we will shortly be
 655   // adjusting SP to allow some space for ESP.  If we're returning to
 656   // compiled code the saved sender SP was saved in sender_sp, so this
 657   // restores it.
 658   andr(sp, esp, -16);
 659 }
 660 
 661 // Lock object
 662 //
 663 // Args:
 664 //      c_rarg1: BasicObjectLock to be used for locking
 665 //
 666 // Kills:
 667 //      r0
 668 //      c_rarg0, c_rarg1, c_rarg2, c_rarg3, c_rarg4, .. (param regs)
 669 //      rscratch1, rscratch2 (scratch regs)

 691     Label slow_case;
 692 
 693     // Load object pointer into obj_reg %c_rarg3
 694     ldr(obj_reg, Address(lock_reg, obj_offset));
 695 
 696     if (LockingMode == LM_LIGHTWEIGHT) {
 697       lightweight_lock(lock_reg, obj_reg, tmp, tmp2, tmp3, slow_case);
 698       b(done);
 699     } else if (LockingMode == LM_LEGACY) {
 700 
 701       if (DiagnoseSyncOnValueBasedClasses != 0) {
 702         load_klass(tmp, obj_reg);
 703         ldrb(tmp, Address(tmp, Klass::misc_flags_offset()));
 704         tst(tmp, KlassFlags::_misc_is_value_based_class);
 705         br(Assembler::NE, slow_case);
 706       }
 707 
 708       // Load (object->mark() | 1) into swap_reg
 709       ldr(rscratch1, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
 710       orr(swap_reg, rscratch1, 1);




 711 
 712       // Save (object->mark() | 1) into BasicLock's displaced header
 713       str(swap_reg, Address(lock_reg, mark_offset));
 714 
 715       assert(lock_offset == 0,
 716              "displached header must be first word in BasicObjectLock");
 717 
 718       Label fail;
 719       cmpxchg_obj_header(swap_reg, lock_reg, obj_reg, rscratch1, count, /*fallthrough*/nullptr);
 720 
 721       // Fast check for recursive lock.
 722       //
 723       // Can apply the optimization only if this is a stack lock
 724       // allocated in this thread. For efficiency, we can focus on
 725       // recently allocated stack locks (instead of reading the stack
 726       // base and checking whether 'mark' points inside the current
 727       // thread stack):
 728       //  1) (mark & 7) == 0, and
 729       //  2) sp <= mark < mark + os::pagesize()
 730       //

1044     Address data(mdp, in_bytes(JumpData::taken_offset()));
1045     ldr(bumped_count, data);
1046     assert(DataLayout::counter_increment == 1,
1047             "flow-free idiom only works with 1");
1048     // Intel does this to catch overflow
1049     // addptr(bumped_count, DataLayout::counter_increment);
1050     // sbbptr(bumped_count, 0);
1051     // so we do this
1052     adds(bumped_count, bumped_count, DataLayout::counter_increment);
1053     Label L;
1054     br(Assembler::CS, L);       // skip store if counter overflow
1055     str(bumped_count, data);
1056     bind(L);
1057     // The method data pointer needs to be updated to reflect the new target.
1058     update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1059     bind(profile_continue);
1060   }
1061 }
1062 
1063 
1064 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1065   if (ProfileInterpreter) {
1066     Label profile_continue;
1067 
1068     // If no method data exists, go to profile_continue.
1069     test_method_data_pointer(mdp, profile_continue);
1070 
1071     // We are taking a branch.  Increment the not taken count.
1072     increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1073 
1074     // The method data pointer needs to be updated to correspond to
1075     // the next bytecode
1076     update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1077     bind(profile_continue);
1078   }
1079 }
1080 
1081 
1082 void InterpreterMacroAssembler::profile_call(Register mdp) {
1083   if (ProfileInterpreter) {
1084     Label profile_continue;
1085 
1086     // If no method data exists, go to profile_continue.
1087     test_method_data_pointer(mdp, profile_continue);
1088 
1089     // We are making a call.  Increment the count.
1090     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1091 
1092     // The method data pointer needs to be updated to reflect the new target.
1093     update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1094     bind(profile_continue);
1095   }
1096 }

1379     // case_array_offset_in_bytes()
1380     movw(reg2, in_bytes(MultiBranchData::per_case_size()));
1381     movw(rscratch1, in_bytes(MultiBranchData::case_array_offset()));
1382     Assembler::maddw(index, index, reg2, rscratch1);
1383 
1384     // Update the case count
1385     increment_mdp_data_at(mdp,
1386                           index,
1387                           in_bytes(MultiBranchData::relative_count_offset()));
1388 
1389     // The method data pointer needs to be updated.
1390     update_mdp_by_offset(mdp,
1391                          index,
1392                          in_bytes(MultiBranchData::
1393                                   relative_displacement_offset()));
1394 
1395     bind(profile_continue);
1396   }
1397 }
1398 


















































































































1399 void InterpreterMacroAssembler::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
1400   if (state == atos) {
1401     MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
1402   }
1403 }
1404 
1405 void InterpreterMacroAssembler::notify_method_entry() {
1406   // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1407   // track stack depth.  If it is possible to enter interp_only_mode we add
1408   // the code to check if the event should be sent.
1409   if (JvmtiExport::can_post_interpreter_events()) {
1410     Label L;
1411     ldrw(r3, Address(rthread, JavaThread::interp_only_mode_offset()));
1412     cbzw(r3, L);
1413     call_VM(noreg, CAST_FROM_FN_PTR(address,
1414                                     InterpreterRuntime::post_method_entry));
1415     bind(L);
1416   }
1417 
1418   if (DTraceMethodProbes) {

1677         profile_obj_type(tmp, mdo_arg_addr);
1678 
1679         int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
1680         off_to_args += to_add;
1681       }
1682 
1683       if (MethodData::profile_return()) {
1684         ldr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())));
1685         sub(tmp, tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
1686       }
1687 
1688       add(rscratch1, mdp, off_to_args);
1689       bind(done);
1690       mov(mdp, rscratch1);
1691 
1692       if (MethodData::profile_return()) {
1693         // We're right after the type profile for the last
1694         // argument. tmp is the number of cells left in the
1695         // CallTypeData/VirtualCallTypeData to reach its end. Non null
1696         // if there's a return to profile.
1697         assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
1698         add(mdp, mdp, tmp, LSL, exact_log2(DataLayout::cell_size));
1699       }
1700       str(mdp, Address(rfp, frame::interpreter_frame_mdp_offset * wordSize));
1701     } else {
1702       assert(MethodData::profile_return(), "either profile call args or call ret");
1703       update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
1704     }
1705 
1706     // mdp points right after the end of the
1707     // CallTypeData/VirtualCallTypeData, right after the cells for the
1708     // return value type if there's one
1709 
1710     bind(profile_continue);
1711   }
1712 }
1713 
1714 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
1715   assert_different_registers(mdp, ret, tmp, rbcp);
1716   if (ProfileInterpreter && MethodData::profile_return()) {
1717     Label profile_continue, done;

1723 
1724       // If we don't profile all invoke bytecodes we must make sure
1725       // it's a bytecode we indeed profile. We can't go back to the
1726       // beginning of the ProfileData we intend to update to check its
1727       // type because we're right after it and we don't known its
1728       // length
1729       Label do_profile;
1730       ldrb(rscratch1, Address(rbcp, 0));
1731       cmp(rscratch1, (u1)Bytecodes::_invokedynamic);
1732       br(Assembler::EQ, do_profile);
1733       cmp(rscratch1, (u1)Bytecodes::_invokehandle);
1734       br(Assembler::EQ, do_profile);
1735       get_method(tmp);
1736       ldrh(rscratch1, Address(tmp, Method::intrinsic_id_offset()));
1737       subs(zr, rscratch1, static_cast<int>(vmIntrinsics::_compiledLambdaForm));
1738       br(Assembler::NE, profile_continue);
1739 
1740       bind(do_profile);
1741     }
1742 
1743     Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
1744     mov(tmp, ret);
1745     profile_obj_type(tmp, mdo_ret_addr);
1746 
1747     bind(profile_continue);
1748   }
1749 }
1750 
1751 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
1752   assert_different_registers(rscratch1, rscratch2, mdp, tmp1, tmp2);
1753   if (ProfileInterpreter && MethodData::profile_parameters()) {
1754     Label profile_continue, done;
1755 
1756     test_method_data_pointer(mdp, profile_continue);
1757 
1758     // Load the offset of the area within the MDO used for
1759     // parameters. If it's negative we're not profiling any parameters
1760     ldrw(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
1761     tbnz(tmp1, 31, profile_continue);  // i.e. sign bit set
1762 
1763     // Compute a pointer to the area for parameters from the offset

  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "asm/macroAssembler.inline.hpp"
  27 #include "compiler/compiler_globals.hpp"
  28 #include "gc/shared/barrierSet.hpp"
  29 #include "gc/shared/barrierSetAssembler.hpp"
  30 #include "interp_masm_aarch64.hpp"
  31 #include "interpreter/interpreter.hpp"
  32 #include "interpreter/interpreterRuntime.hpp"
  33 #include "logging/log.hpp"
  34 #include "oops/arrayOop.hpp"
  35 #include "oops/constMethodFlags.hpp"
  36 #include "oops/markWord.hpp"
  37 #include "oops/method.hpp"
  38 #include "oops/methodData.hpp"
  39 #include "oops/inlineKlass.hpp"
  40 #include "oops/resolvedFieldEntry.hpp"
  41 #include "oops/resolvedIndyEntry.hpp"
  42 #include "oops/resolvedMethodEntry.hpp"
  43 #include "prims/jvmtiExport.hpp"
  44 #include "prims/jvmtiThreadState.hpp"
  45 #include "runtime/basicLock.hpp"
  46 #include "runtime/frame.inline.hpp"
  47 #include "runtime/javaThread.hpp"
  48 #include "runtime/safepointMechanism.hpp"
  49 #include "runtime/sharedRuntime.hpp"
  50 #include "utilities/powerOfTwo.hpp"
  51 
  52 void InterpreterMacroAssembler::narrow(Register result) {
  53 
  54   // Get method->_constMethod->_result_type
  55   ldr(rscratch1, Address(rfp, frame::interpreter_frame_method_offset * wordSize));
  56   ldr(rscratch1, Address(rscratch1, Method::const_offset()));
  57   ldrb(rscratch1, Address(rscratch1, ConstMethod::result_type_offset()));
  58 
  59   Label done, notBool, notByte, notChar;

 193     ldrw(index, Address(rbcp, bcp_offset));
 194   } else if (index_size == sizeof(u1)) {
 195     load_unsigned_byte(index, Address(rbcp, bcp_offset));
 196   } else {
 197     ShouldNotReachHere();
 198   }
 199 }
 200 
 201 void InterpreterMacroAssembler::get_method_counters(Register method,
 202                                                     Register mcs, Label& skip) {
 203   Label has_counters;
 204   ldr(mcs, Address(method, Method::method_counters_offset()));
 205   cbnz(mcs, has_counters);
 206   call_VM(noreg, CAST_FROM_FN_PTR(address,
 207           InterpreterRuntime::build_method_counters), method);
 208   ldr(mcs, Address(method, Method::method_counters_offset()));
 209   cbz(mcs, skip); // No MethodCounters allocated, OutOfMemory
 210   bind(has_counters);
 211 }
 212 
 213 void InterpreterMacroAssembler::allocate_instance(Register klass, Register new_obj,
 214                                                   Register t1, Register t2,
 215                                                   bool clear_fields, Label& alloc_failed) {
 216   MacroAssembler::allocate_instance(klass, new_obj, t1, t2, clear_fields, alloc_failed);
 217   if (DTraceMethodProbes) {
 218       // Trigger dtrace event for fastpath
 219     push(atos);
 220     call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), new_obj);
 221     pop(atos);
 222   }
 223 }
 224 
 225 void InterpreterMacroAssembler::read_flat_field(Register entry,
 226                                                 Register field_index, Register field_offset,
 227                                                 Register temp, Register obj) {
 228   Label alloc_failed, done;
 229   const Register src = field_offset;
 230   const Register alloc_temp = r10;
 231   const Register dst_temp   = field_index;
 232   const Register layout_info = temp;
 233   assert_different_registers(obj, entry, field_index, field_offset, temp, alloc_temp);
 234 
 235   // Grab the inline field klass
 236   ldr(rscratch1, Address(entry, in_bytes(ResolvedFieldEntry::field_holder_offset())));
 237   inline_layout_info(rscratch1, field_index, layout_info);
 238 
 239   const Register field_klass = dst_temp;
 240   ldr(field_klass, Address(layout_info, in_bytes(InlineLayoutInfo::klass_offset())));
 241 
 242   // allocate buffer
 243   push(obj); // save holder
 244   allocate_instance(field_klass, obj, alloc_temp, rscratch2, false, alloc_failed);
 245 
 246   // Have an oop instance buffer, copy into it
 247   payload_address(obj, dst_temp, field_klass);  // danger, uses rscratch1
 248   pop(alloc_temp);             // restore holder
 249   lea(src, Address(alloc_temp, field_offset));
 250   // call_VM_leaf, clobbers a few regs, save restore new obj
 251   push(obj);
 252   flat_field_copy(IS_DEST_UNINITIALIZED, src, dst_temp, layout_info);
 253   pop(obj);
 254   b(done);
 255 
 256   bind(alloc_failed);
 257   pop(obj);
 258   call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flat_field),
 259           obj, entry);
 260 
 261   bind(done);
 262   membar(Assembler::StoreStore);
 263 }
 264 
 265 // Load object from cpool->resolved_references(index)
 266 void InterpreterMacroAssembler::load_resolved_reference_at_index(
 267                                            Register result, Register index, Register tmp) {
 268   assert_different_registers(result, index);
 269 
 270   get_constant_pool(result);
 271   // load pointer for resolved_references[] objArray
 272   ldr(result, Address(result, ConstantPool::cache_offset()));
 273   ldr(result, Address(result, ConstantPoolCache::resolved_references_offset()));
 274   resolve_oop_handle(result, tmp, rscratch2);
 275   // Add in the index
 276   add(index, index, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop);
 277   load_heap_oop(result, Address(result, index, Address::uxtw(LogBytesPerHeapOop)), tmp, rscratch2);
 278 }
 279 
 280 void InterpreterMacroAssembler::load_resolved_klass_at_offset(
 281                              Register cpool, Register index, Register klass, Register temp) {
 282   add(temp, cpool, index, LSL, LogBytesPerWord);
 283   ldrh(temp, Address(temp, sizeof(ConstantPool))); // temp = resolved_klass_index
 284   ldr(klass, Address(cpool,  ConstantPool::resolved_klasses_offset())); // klass = cpool->_resolved_klasses
 285   add(klass, klass, temp, LSL, LogBytesPerWord);
 286   ldr(klass, Address(klass, Array<Klass*>::base_offset_in_bytes()));
 287 }
 288 
 289 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
 290 // subtype of super_klass.
 291 //
 292 // Args:
 293 //      r0: superklass
 294 //      Rsub_klass: subklass
 295 //
 296 // Kills:
 297 //      r2, r5
 298 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
 299                                                   Label& ok_is_subtype,
 300                                                   bool profile) {
 301   assert(Rsub_klass != r0, "r0 holds superklass");
 302   assert(Rsub_klass != r2, "r2 holds 2ndary super array length");
 303   assert(Rsub_klass != r5, "r5 holds 2ndary super array scan ptr");
 304 
 305   // Profile the not-null value's klass.
 306   if (profile) {
 307     profile_typecheck(r2, Rsub_klass, r5); // blows r2, reloads r5
 308   }
 309 
 310   // Do the check.
 311   check_klass_subtype(Rsub_klass, r0, r2, ok_is_subtype); // blows r2
 312 }
 313 
 314 // Java Expression Stack
 315 
 316 void InterpreterMacroAssembler::pop_ptr(Register r) {
 317   ldr(r, post(esp, wordSize));
 318 }
 319 
 320 void InterpreterMacroAssembler::pop_i(Register r) {
 321   ldrw(r, post(esp, wordSize));
 322 }
 323 
 324 void InterpreterMacroAssembler::pop_l(Register r) {
 325   ldr(r, post(esp, 2 * Interpreter::stackElementSize));
 326 }
 327 
 328 void InterpreterMacroAssembler::push_ptr(Register r) {

 662 
 663     add(c_rarg1, c_rarg1, entry_size); // otherwise advance to next entry
 664     bind(entry);
 665     cmp(c_rarg1, r19); // check if bottom reached
 666     br(Assembler::NE, loop); // if not at bottom then check this entry
 667   }
 668 
 669   bind(no_unlock);
 670 
 671   // jvmti support
 672   if (notify_jvmdi) {
 673     notify_method_exit(state, NotifyJVMTI);    // preserve TOSCA
 674   } else {
 675     notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
 676   }
 677 
 678   // remove activation
 679   // get sender esp
 680   ldr(rscratch2,
 681       Address(rfp, frame::interpreter_frame_sender_sp_offset * wordSize));
 682 
 683   if (StackReservedPages > 0) {
 684     // testing if reserved zone needs to be re-enabled
 685     Label no_reserved_zone_enabling;
 686 
 687     // check if already enabled - if so no re-enabling needed
 688     assert(sizeof(StackOverflow::StackGuardState) == 4, "unexpected size");
 689     ldrw(rscratch1, Address(rthread, JavaThread::stack_guard_state_offset()));
 690     cmpw(rscratch1, (u1)StackOverflow::stack_guard_enabled);
 691     br(Assembler::EQ, no_reserved_zone_enabling);
 692 
 693     // look for an overflow into the stack reserved zone, i.e.
 694     // interpreter_frame_sender_sp <= JavaThread::reserved_stack_activation
 695     ldr(rscratch1, Address(rthread, JavaThread::reserved_stack_activation_offset()));
 696     cmp(rscratch2, rscratch1);
 697     br(Assembler::LS, no_reserved_zone_enabling);
 698 
 699     call_VM_leaf(
 700       CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
 701     call_VM(noreg, CAST_FROM_FN_PTR(address,
 702                    InterpreterRuntime::throw_delayed_StackOverflowError));
 703     should_not_reach_here();
 704 
 705     bind(no_reserved_zone_enabling);
 706   }
 707 
 708   if (state == atos && InlineTypeReturnedAsFields) {
 709     // Check if we are returning an non-null inline type and load its fields into registers
 710     Label skip;
 711     test_oop_is_not_inline_type(r0, rscratch2, skip);
 712 
 713     // Load fields from a buffered value with an inline class specific handler
 714     load_klass(rscratch1 /*dst*/, r0 /*src*/);
 715     ldr(rscratch1, Address(rscratch1, InstanceKlass::adr_inlineklass_fixed_block_offset()));
 716     ldr(rscratch1, Address(rscratch1, InlineKlass::unpack_handler_offset()));
 717     // Unpack handler can be null if inline type is not scalarizable in returns
 718     cbz(rscratch1, skip);
 719 
 720     blr(rscratch1);
 721 #ifdef ASSERT
 722     // TODO 8284443 Enable
 723     if (StressCallingConvention && false) {
 724       Label skip_stress;
 725       ldr(rscratch1, Address(rfp, frame::interpreter_frame_method_offset * wordSize));
 726       ldrw(rscratch1, Address(rscratch1, Method::flags_offset()));
 727       tstw(rscratch1, MethodFlags::has_scalarized_return_flag());
 728       br(Assembler::EQ, skip_stress);
 729       load_klass(r0, r0);
 730       orr(r0, r0, 1);
 731       bind(skip_stress);
 732     }
 733 #endif
 734     bind(skip);
 735     // Check above kills sender esp in rscratch2. Reload it.
 736     ldr(rscratch2, Address(rfp, frame::interpreter_frame_sender_sp_offset * wordSize));
 737   }
 738 
 739   // restore sender esp
 740   mov(esp, rscratch2);
 741   // remove frame anchor
 742   leave();
 743   // If we're returning to interpreted code we will shortly be
 744   // adjusting SP to allow some space for ESP.  If we're returning to
 745   // compiled code the saved sender SP was saved in sender_sp, so this
 746   // restores it.
 747   andr(sp, esp, -16);
 748 }
 749 
 750 // Lock object
 751 //
 752 // Args:
 753 //      c_rarg1: BasicObjectLock to be used for locking
 754 //
 755 // Kills:
 756 //      r0
 757 //      c_rarg0, c_rarg1, c_rarg2, c_rarg3, c_rarg4, .. (param regs)
 758 //      rscratch1, rscratch2 (scratch regs)

 780     Label slow_case;
 781 
 782     // Load object pointer into obj_reg %c_rarg3
 783     ldr(obj_reg, Address(lock_reg, obj_offset));
 784 
 785     if (LockingMode == LM_LIGHTWEIGHT) {
 786       lightweight_lock(lock_reg, obj_reg, tmp, tmp2, tmp3, slow_case);
 787       b(done);
 788     } else if (LockingMode == LM_LEGACY) {
 789 
 790       if (DiagnoseSyncOnValueBasedClasses != 0) {
 791         load_klass(tmp, obj_reg);
 792         ldrb(tmp, Address(tmp, Klass::misc_flags_offset()));
 793         tst(tmp, KlassFlags::_misc_is_value_based_class);
 794         br(Assembler::NE, slow_case);
 795       }
 796 
 797       // Load (object->mark() | 1) into swap_reg
 798       ldr(rscratch1, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
 799       orr(swap_reg, rscratch1, 1);
 800       if (EnableValhalla) {
 801         // Mask inline_type bit such that we go to the slow path if object is an inline type
 802         andr(swap_reg, swap_reg, ~((int) markWord::inline_type_bit_in_place));
 803       }
 804 
 805       // Save (object->mark() | 1) into BasicLock's displaced header
 806       str(swap_reg, Address(lock_reg, mark_offset));
 807 
 808       assert(lock_offset == 0,
 809              "displached header must be first word in BasicObjectLock");
 810 
 811       Label fail;
 812       cmpxchg_obj_header(swap_reg, lock_reg, obj_reg, rscratch1, count, /*fallthrough*/nullptr);
 813 
 814       // Fast check for recursive lock.
 815       //
 816       // Can apply the optimization only if this is a stack lock
 817       // allocated in this thread. For efficiency, we can focus on
 818       // recently allocated stack locks (instead of reading the stack
 819       // base and checking whether 'mark' points inside the current
 820       // thread stack):
 821       //  1) (mark & 7) == 0, and
 822       //  2) sp <= mark < mark + os::pagesize()
 823       //

1137     Address data(mdp, in_bytes(JumpData::taken_offset()));
1138     ldr(bumped_count, data);
1139     assert(DataLayout::counter_increment == 1,
1140             "flow-free idiom only works with 1");
1141     // Intel does this to catch overflow
1142     // addptr(bumped_count, DataLayout::counter_increment);
1143     // sbbptr(bumped_count, 0);
1144     // so we do this
1145     adds(bumped_count, bumped_count, DataLayout::counter_increment);
1146     Label L;
1147     br(Assembler::CS, L);       // skip store if counter overflow
1148     str(bumped_count, data);
1149     bind(L);
1150     // The method data pointer needs to be updated to reflect the new target.
1151     update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1152     bind(profile_continue);
1153   }
1154 }
1155 
1156 
1157 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp, bool acmp) {
1158   if (ProfileInterpreter) {
1159     Label profile_continue;
1160 
1161     // If no method data exists, go to profile_continue.
1162     test_method_data_pointer(mdp, profile_continue);
1163 
1164     // We are taking a branch.  Increment the not taken count.
1165     increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1166 
1167     // The method data pointer needs to be updated to correspond to
1168     // the next bytecode
1169     update_mdp_by_constant(mdp, acmp ? in_bytes(ACmpData::acmp_data_size()) : in_bytes(BranchData::branch_data_size()));
1170     bind(profile_continue);
1171   }
1172 }
1173 
1174 
1175 void InterpreterMacroAssembler::profile_call(Register mdp) {
1176   if (ProfileInterpreter) {
1177     Label profile_continue;
1178 
1179     // If no method data exists, go to profile_continue.
1180     test_method_data_pointer(mdp, profile_continue);
1181 
1182     // We are making a call.  Increment the count.
1183     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1184 
1185     // The method data pointer needs to be updated to reflect the new target.
1186     update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1187     bind(profile_continue);
1188   }
1189 }

1472     // case_array_offset_in_bytes()
1473     movw(reg2, in_bytes(MultiBranchData::per_case_size()));
1474     movw(rscratch1, in_bytes(MultiBranchData::case_array_offset()));
1475     Assembler::maddw(index, index, reg2, rscratch1);
1476 
1477     // Update the case count
1478     increment_mdp_data_at(mdp,
1479                           index,
1480                           in_bytes(MultiBranchData::relative_count_offset()));
1481 
1482     // The method data pointer needs to be updated.
1483     update_mdp_by_offset(mdp,
1484                          index,
1485                          in_bytes(MultiBranchData::
1486                                   relative_displacement_offset()));
1487 
1488     bind(profile_continue);
1489   }
1490 }
1491 
1492 template <class ArrayData> void InterpreterMacroAssembler::profile_array_type(Register mdp,
1493                                                                               Register array,
1494                                                                               Register tmp) {
1495   if (ProfileInterpreter) {
1496     Label profile_continue;
1497 
1498     // If no method data exists, go to profile_continue.
1499     test_method_data_pointer(mdp, profile_continue);
1500 
1501     mov(tmp, array);
1502     profile_obj_type(tmp, Address(mdp, in_bytes(ArrayData::array_offset())));
1503 
1504     Label not_flat;
1505     test_non_flat_array_oop(array, tmp, not_flat);
1506 
1507     set_mdp_flag_at(mdp, ArrayData::flat_array_byte_constant());
1508 
1509     bind(not_flat);
1510 
1511     Label not_null_free;
1512     test_non_null_free_array_oop(array, tmp, not_null_free);
1513 
1514     set_mdp_flag_at(mdp, ArrayData::null_free_array_byte_constant());
1515 
1516     bind(not_null_free);
1517 
1518     bind(profile_continue);
1519   }
1520 }
1521 
1522 template void InterpreterMacroAssembler::profile_array_type<ArrayLoadData>(Register mdp,
1523                                                                            Register array,
1524                                                                            Register tmp);
1525 template void InterpreterMacroAssembler::profile_array_type<ArrayStoreData>(Register mdp,
1526                                                                             Register array,
1527                                                                             Register tmp);
1528 
1529 void InterpreterMacroAssembler::profile_multiple_element_types(Register mdp, Register element, Register tmp, const Register tmp2) {
1530   if (ProfileInterpreter) {
1531     Label profile_continue;
1532 
1533     // If no method data exists, go to profile_continue.
1534     test_method_data_pointer(mdp, profile_continue);
1535 
1536     Label done, update;
1537     cbnz(element, update);
1538     set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1539     b(done);
1540 
1541     bind(update);
1542     load_klass(tmp, element);
1543 
1544     // Record the object type.
1545     record_klass_in_profile(tmp, mdp, tmp2);
1546 
1547     bind(done);
1548 
1549     // The method data pointer needs to be updated.
1550     update_mdp_by_constant(mdp, in_bytes(ArrayStoreData::array_store_data_size()));
1551 
1552     bind(profile_continue);
1553   }
1554 }
1555 
1556 
1557 void InterpreterMacroAssembler::profile_element_type(Register mdp,
1558                                                      Register element,
1559                                                      Register tmp) {
1560   if (ProfileInterpreter) {
1561     Label profile_continue;
1562 
1563     // If no method data exists, go to profile_continue.
1564     test_method_data_pointer(mdp, profile_continue);
1565 
1566     mov(tmp, element);
1567     profile_obj_type(tmp, Address(mdp, in_bytes(ArrayLoadData::element_offset())));
1568 
1569     // The method data pointer needs to be updated.
1570     update_mdp_by_constant(mdp, in_bytes(ArrayLoadData::array_load_data_size()));
1571 
1572     bind(profile_continue);
1573   }
1574 }
1575 
1576 void InterpreterMacroAssembler::profile_acmp(Register mdp,
1577                                              Register left,
1578                                              Register right,
1579                                              Register tmp) {
1580   if (ProfileInterpreter) {
1581     Label profile_continue;
1582 
1583     // If no method data exists, go to profile_continue.
1584     test_method_data_pointer(mdp, profile_continue);
1585 
1586     mov(tmp, left);
1587     profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::left_offset())));
1588 
1589     Label left_not_inline_type;
1590     test_oop_is_not_inline_type(left, tmp, left_not_inline_type);
1591     set_mdp_flag_at(mdp, ACmpData::left_inline_type_byte_constant());
1592     bind(left_not_inline_type);
1593 
1594     mov(tmp, right);
1595     profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::right_offset())));
1596 
1597     Label right_not_inline_type;
1598     test_oop_is_not_inline_type(right, tmp, right_not_inline_type);
1599     set_mdp_flag_at(mdp, ACmpData::right_inline_type_byte_constant());
1600     bind(right_not_inline_type);
1601 
1602     bind(profile_continue);
1603   }
1604 }
1605 
1606 void InterpreterMacroAssembler::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
1607   if (state == atos) {
1608     MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
1609   }
1610 }
1611 
1612 void InterpreterMacroAssembler::notify_method_entry() {
1613   // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1614   // track stack depth.  If it is possible to enter interp_only_mode we add
1615   // the code to check if the event should be sent.
1616   if (JvmtiExport::can_post_interpreter_events()) {
1617     Label L;
1618     ldrw(r3, Address(rthread, JavaThread::interp_only_mode_offset()));
1619     cbzw(r3, L);
1620     call_VM(noreg, CAST_FROM_FN_PTR(address,
1621                                     InterpreterRuntime::post_method_entry));
1622     bind(L);
1623   }
1624 
1625   if (DTraceMethodProbes) {

1884         profile_obj_type(tmp, mdo_arg_addr);
1885 
1886         int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
1887         off_to_args += to_add;
1888       }
1889 
1890       if (MethodData::profile_return()) {
1891         ldr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())));
1892         sub(tmp, tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
1893       }
1894 
1895       add(rscratch1, mdp, off_to_args);
1896       bind(done);
1897       mov(mdp, rscratch1);
1898 
1899       if (MethodData::profile_return()) {
1900         // We're right after the type profile for the last
1901         // argument. tmp is the number of cells left in the
1902         // CallTypeData/VirtualCallTypeData to reach its end. Non null
1903         // if there's a return to profile.
1904         assert(SingleTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
1905         add(mdp, mdp, tmp, LSL, exact_log2(DataLayout::cell_size));
1906       }
1907       str(mdp, Address(rfp, frame::interpreter_frame_mdp_offset * wordSize));
1908     } else {
1909       assert(MethodData::profile_return(), "either profile call args or call ret");
1910       update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
1911     }
1912 
1913     // mdp points right after the end of the
1914     // CallTypeData/VirtualCallTypeData, right after the cells for the
1915     // return value type if there's one
1916 
1917     bind(profile_continue);
1918   }
1919 }
1920 
1921 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
1922   assert_different_registers(mdp, ret, tmp, rbcp);
1923   if (ProfileInterpreter && MethodData::profile_return()) {
1924     Label profile_continue, done;

1930 
1931       // If we don't profile all invoke bytecodes we must make sure
1932       // it's a bytecode we indeed profile. We can't go back to the
1933       // beginning of the ProfileData we intend to update to check its
1934       // type because we're right after it and we don't known its
1935       // length
1936       Label do_profile;
1937       ldrb(rscratch1, Address(rbcp, 0));
1938       cmp(rscratch1, (u1)Bytecodes::_invokedynamic);
1939       br(Assembler::EQ, do_profile);
1940       cmp(rscratch1, (u1)Bytecodes::_invokehandle);
1941       br(Assembler::EQ, do_profile);
1942       get_method(tmp);
1943       ldrh(rscratch1, Address(tmp, Method::intrinsic_id_offset()));
1944       subs(zr, rscratch1, static_cast<int>(vmIntrinsics::_compiledLambdaForm));
1945       br(Assembler::NE, profile_continue);
1946 
1947       bind(do_profile);
1948     }
1949 
1950     Address mdo_ret_addr(mdp, -in_bytes(SingleTypeEntry::size()));
1951     mov(tmp, ret);
1952     profile_obj_type(tmp, mdo_ret_addr);
1953 
1954     bind(profile_continue);
1955   }
1956 }
1957 
1958 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
1959   assert_different_registers(rscratch1, rscratch2, mdp, tmp1, tmp2);
1960   if (ProfileInterpreter && MethodData::profile_parameters()) {
1961     Label profile_continue, done;
1962 
1963     test_method_data_pointer(mdp, profile_continue);
1964 
1965     // Load the offset of the area within the MDO used for
1966     // parameters. If it's negative we're not profiling any parameters
1967     ldrw(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
1968     tbnz(tmp1, 31, profile_continue);  // i.e. sign bit set
1969 
1970     // Compute a pointer to the area for parameters from the offset
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