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 "precompiled.hpp"
26 #ifndef _WINDOWS
27 #include "alloca.h"
28 #endif
29 #include "asm/macroAssembler.hpp"
30 #include "asm/macroAssembler.inline.hpp"
31 #include "code/debugInfoRec.hpp"
32 #include "code/icBuffer.hpp"
33 #include "code/nativeInst.hpp"
34 #include "code/vtableStubs.hpp"
35 #include "compiler/oopMap.hpp"
36 #include "gc/shared/collectedHeap.hpp"
37 #include "gc/shared/gcLocker.hpp"
38 #include "gc/shared/barrierSet.hpp"
39 #include "gc/shared/barrierSetAssembler.hpp"
40 #include "interpreter/interpreter.hpp"
41 #include "logging/log.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.hpp"
44 #include "oops/compiledICHolder.hpp"
45 #include "oops/klass.inline.hpp"
46 #include "prims/methodHandles.hpp"
47 #include "runtime/jniHandles.hpp"
48 #include "runtime/safepointMechanism.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "runtime/signature.hpp"
511 case T_SHORT:
512 case T_INT:
513 if (int_args < Argument::n_int_register_parameters_j) {
514 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg());
515 } else {
516 regs[i].set1(VMRegImpl::stack2reg(stk_args));
517 stk_args += 2;
518 }
519 break;
520 case T_VOID:
521 // halves of T_LONG or T_DOUBLE
522 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half");
523 regs[i].set_bad();
524 break;
525 case T_LONG:
526 assert((i + 1) < total_args_passed && sig_bt[i + 1] == T_VOID, "expecting half");
527 // fall through
528 case T_OBJECT:
529 case T_ARRAY:
530 case T_ADDRESS:
531 if (int_args < Argument::n_int_register_parameters_j) {
532 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg());
533 } else {
534 regs[i].set2(VMRegImpl::stack2reg(stk_args));
535 stk_args += 2;
536 }
537 break;
538 case T_FLOAT:
539 if (fp_args < Argument::n_float_register_parameters_j) {
540 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg());
541 } else {
542 regs[i].set1(VMRegImpl::stack2reg(stk_args));
543 stk_args += 2;
544 }
545 break;
546 case T_DOUBLE:
547 assert((i + 1) < total_args_passed && sig_bt[i + 1] == T_VOID, "expecting half");
548 if (fp_args < Argument::n_float_register_parameters_j) {
549 regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg());
550 } else {
551 regs[i].set2(VMRegImpl::stack2reg(stk_args));
552 stk_args += 2;
553 }
554 break;
555 default:
556 ShouldNotReachHere();
557 break;
558 }
559 }
560
561 return align_up(stk_args, 2);
562 }
563
564 // Patch the callers callsite with entry to compiled code if it exists.
565 static void patch_callers_callsite(MacroAssembler *masm) {
566 Label L;
567 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD);
568 __ jcc(Assembler::equal, L);
569
570 // Save the current stack pointer
571 __ mov(r13, rsp);
572 // Schedule the branch target address early.
573 // Call into the VM to patch the caller, then jump to compiled callee
574 // rax isn't live so capture return address while we easily can
575 __ movptr(rax, Address(rsp, 0));
576
577 // align stack so push_CPU_state doesn't fault
578 __ andptr(rsp, -(StackAlignmentInBytes));
579 __ push_CPU_state();
580 __ vzeroupper();
581 // VM needs caller's callsite
582 // VM needs target method
583 // This needs to be a long call since we will relocate this adapter to
586 // Allocate argument register save area
587 if (frame::arg_reg_save_area_bytes != 0) {
588 __ subptr(rsp, frame::arg_reg_save_area_bytes);
589 }
590 __ mov(c_rarg0, rbx);
591 __ mov(c_rarg1, rax);
592 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite)));
593
594 // De-allocate argument register save area
595 if (frame::arg_reg_save_area_bytes != 0) {
596 __ addptr(rsp, frame::arg_reg_save_area_bytes);
597 }
598
599 __ vzeroupper();
600 __ pop_CPU_state();
601 // restore sp
602 __ mov(rsp, r13);
603 __ bind(L);
604 }
605
606
607 static void gen_c2i_adapter(MacroAssembler *masm,
608 int total_args_passed,
609 int comp_args_on_stack,
610 const BasicType *sig_bt,
611 const VMRegPair *regs,
612 Label& skip_fixup) {
613 // Before we get into the guts of the C2I adapter, see if we should be here
614 // at all. We've come from compiled code and are attempting to jump to the
615 // interpreter, which means the caller made a static call to get here
616 // (vcalls always get a compiled target if there is one). Check for a
617 // compiled target. If there is one, we need to patch the caller's call.
618 patch_callers_callsite(masm);
619
620 __ bind(skip_fixup);
621
622 // Since all args are passed on the stack, total_args_passed *
623 // Interpreter::stackElementSize is the space we need. Plus 1 because
624 // we also account for the return address location since
625 // we store it first rather than hold it in rax across all the shuffling
626
627 int extraspace = (total_args_passed * Interpreter::stackElementSize) + wordSize;
628
629 // stack is aligned, keep it that way
630 extraspace = align_up(extraspace, 2*wordSize);
631
632 // Get return address
633 __ pop(rax);
634
635 // set senderSP value
636 __ mov(r13, rsp);
637
638 __ subptr(rsp, extraspace);
639
640 // Store the return address in the expected location
641 __ movptr(Address(rsp, 0), rax);
642
643 // Now write the args into the outgoing interpreter space
644 for (int i = 0; i < total_args_passed; i++) {
645 if (sig_bt[i] == T_VOID) {
646 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half");
647 continue;
648 }
649
650 // offset to start parameters
651 int st_off = (total_args_passed - i) * Interpreter::stackElementSize;
652 int next_off = st_off - Interpreter::stackElementSize;
653
654 // Say 4 args:
655 // i st_off
656 // 0 32 T_LONG
657 // 1 24 T_VOID
658 // 2 16 T_OBJECT
659 // 3 8 T_BOOL
660 // - 0 return address
661 //
662 // However to make thing extra confusing. Because we can fit a long/double in
663 // a single slot on a 64 bt vm and it would be silly to break them up, the interpreter
664 // leaves one slot empty and only stores to a single slot. In this case the
665 // slot that is occupied is the T_VOID slot. See I said it was confusing.
666
667 VMReg r_1 = regs[i].first();
668 VMReg r_2 = regs[i].second();
669 if (!r_1->is_valid()) {
670 assert(!r_2->is_valid(), "");
671 continue;
672 }
673 if (r_1->is_stack()) {
674 // memory to memory use rax
675 int ld_off = r_1->reg2stack() * VMRegImpl::stack_slot_size + extraspace;
676 if (!r_2->is_valid()) {
677 // sign extend??
678 __ movl(rax, Address(rsp, ld_off));
679 __ movptr(Address(rsp, st_off), rax);
680
681 } else {
682
683 __ movq(rax, Address(rsp, ld_off));
684
685 // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG
686 // T_DOUBLE and T_LONG use two slots in the interpreter
687 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) {
688 // ld_off == LSW, ld_off+wordSize == MSW
689 // st_off == MSW, next_off == LSW
690 __ movq(Address(rsp, next_off), rax);
691 #ifdef ASSERT
692 // Overwrite the unused slot with known junk
693 __ mov64(rax, CONST64(0xdeadffffdeadaaaa));
694 __ movptr(Address(rsp, st_off), rax);
695 #endif /* ASSERT */
696 } else {
697 __ movq(Address(rsp, st_off), rax);
698 }
699 }
700 } else if (r_1->is_Register()) {
701 Register r = r_1->as_Register();
702 if (!r_2->is_valid()) {
703 // must be only an int (or less ) so move only 32bits to slot
704 // why not sign extend??
705 __ movl(Address(rsp, st_off), r);
706 } else {
707 // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG
708 // T_DOUBLE and T_LONG use two slots in the interpreter
709 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) {
710 // long/double in gpr
711 #ifdef ASSERT
712 // Overwrite the unused slot with known junk
713 __ mov64(rax, CONST64(0xdeadffffdeadaaab));
714 __ movptr(Address(rsp, st_off), rax);
715 #endif /* ASSERT */
716 __ movq(Address(rsp, next_off), r);
717 } else {
718 __ movptr(Address(rsp, st_off), r);
719 }
720 }
721 } else {
722 assert(r_1->is_XMMRegister(), "");
723 if (!r_2->is_valid()) {
724 // only a float use just part of the slot
725 __ movflt(Address(rsp, st_off), r_1->as_XMMRegister());
726 } else {
727 #ifdef ASSERT
728 // Overwrite the unused slot with known junk
729 __ mov64(rax, CONST64(0xdeadffffdeadaaac));
730 __ movptr(Address(rsp, st_off), rax);
731 #endif /* ASSERT */
732 __ movdbl(Address(rsp, next_off), r_1->as_XMMRegister());
733 }
734 }
735 }
736
737 // Schedule the branch target address early.
738 __ movptr(rcx, Address(rbx, in_bytes(Method::interpreter_entry_offset())));
739 __ jmp(rcx);
740 }
741
742 static void range_check(MacroAssembler* masm, Register pc_reg, Register temp_reg,
743 address code_start, address code_end,
744 Label& L_ok) {
745 Label L_fail;
746 __ lea(temp_reg, ExternalAddress(code_start));
747 __ cmpptr(pc_reg, temp_reg);
748 __ jcc(Assembler::belowEqual, L_fail);
749 __ lea(temp_reg, ExternalAddress(code_end));
750 __ cmpptr(pc_reg, temp_reg);
751 __ jcc(Assembler::below, L_ok);
752 __ bind(L_fail);
753 }
754
755 void SharedRuntime::gen_i2c_adapter(MacroAssembler *masm,
756 int total_args_passed,
757 int comp_args_on_stack,
758 const BasicType *sig_bt,
759 const VMRegPair *regs) {
760
761 // Note: r13 contains the senderSP on entry. We must preserve it since
762 // we may do a i2c -> c2i transition if we lose a race where compiled
763 // code goes non-entrant while we get args ready.
764 // In addition we use r13 to locate all the interpreter args as
765 // we must align the stack to 16 bytes on an i2c entry else we
766 // lose alignment we expect in all compiled code and register
767 // save code can segv when fxsave instructions find improperly
768 // aligned stack pointer.
769
770 // Adapters can be frameless because they do not require the caller
771 // to perform additional cleanup work, such as correcting the stack pointer.
772 // An i2c adapter is frameless because the *caller* frame, which is interpreted,
773 // routinely repairs its own stack pointer (from interpreter_frame_last_sp),
774 // even if a callee has modified the stack pointer.
775 // A c2i adapter is frameless because the *callee* frame, which is interpreted,
776 // routinely repairs its caller's stack pointer (from sender_sp, which is set
777 // up via the senderSP register).
778 // In other words, if *either* the caller or callee is interpreted, we can
830 comp_words_on_stack = align_up(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord;
831 // Round up to miminum stack alignment, in wordSize
832 comp_words_on_stack = align_up(comp_words_on_stack, 2);
833 __ subptr(rsp, comp_words_on_stack * wordSize);
834 }
835
836
837 // Ensure compiled code always sees stack at proper alignment
838 __ andptr(rsp, -16);
839
840 // push the return address and misalign the stack that youngest frame always sees
841 // as far as the placement of the call instruction
842 __ push(rax);
843
844 // Put saved SP in another register
845 const Register saved_sp = rax;
846 __ movptr(saved_sp, r11);
847
848 // Will jump to the compiled code just as if compiled code was doing it.
849 // Pre-load the register-jump target early, to schedule it better.
850 __ movptr(r11, Address(rbx, in_bytes(Method::from_compiled_offset())));
851
852 #if INCLUDE_JVMCI
853 if (EnableJVMCI) {
854 // check if this call should be routed towards a specific entry point
855 __ cmpptr(Address(r15_thread, in_bytes(JavaThread::jvmci_alternate_call_target_offset())), 0);
856 Label no_alternative_target;
857 __ jcc(Assembler::equal, no_alternative_target);
858 __ movptr(r11, Address(r15_thread, in_bytes(JavaThread::jvmci_alternate_call_target_offset())));
859 __ movptr(Address(r15_thread, in_bytes(JavaThread::jvmci_alternate_call_target_offset())), 0);
860 __ bind(no_alternative_target);
861 }
862 #endif // INCLUDE_JVMCI
863
864 // Now generate the shuffle code. Pick up all register args and move the
865 // rest through the floating point stack top.
866 for (int i = 0; i < total_args_passed; i++) {
867 if (sig_bt[i] == T_VOID) {
868 // Longs and doubles are passed in native word order, but misaligned
869 // in the 32-bit build.
870 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half");
871 continue;
872 }
873
874 // Pick up 0, 1 or 2 words from SP+offset.
875
876 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(),
877 "scrambled load targets?");
878 // Load in argument order going down.
879 int ld_off = (total_args_passed - i)*Interpreter::stackElementSize;
880 // Point to interpreter value (vs. tag)
881 int next_off = ld_off - Interpreter::stackElementSize;
882 //
883 //
884 //
885 VMReg r_1 = regs[i].first();
886 VMReg r_2 = regs[i].second();
887 if (!r_1->is_valid()) {
888 assert(!r_2->is_valid(), "");
889 continue;
890 }
892 // Convert stack slot to an SP offset (+ wordSize to account for return address )
893 int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize;
894
895 // We can use r13 as a temp here because compiled code doesn't need r13 as an input
896 // and if we end up going thru a c2i because of a miss a reasonable value of r13
897 // will be generated.
898 if (!r_2->is_valid()) {
899 // sign extend???
900 __ movl(r13, Address(saved_sp, ld_off));
901 __ movptr(Address(rsp, st_off), r13);
902 } else {
903 //
904 // We are using two optoregs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE
905 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case
906 // So we must adjust where to pick up the data to match the interpreter.
907 //
908 // Interpreter local[n] == MSW, local[n+1] == LSW however locals
909 // are accessed as negative so LSW is at LOW address
910
911 // ld_off is MSW so get LSW
912 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)?
913 next_off : ld_off;
914 __ movq(r13, Address(saved_sp, offset));
915 // st_off is LSW (i.e. reg.first())
916 __ movq(Address(rsp, st_off), r13);
917 }
918 } else if (r_1->is_Register()) { // Register argument
919 Register r = r_1->as_Register();
920 assert(r != rax, "must be different");
921 if (r_2->is_valid()) {
922 //
923 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE
924 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case
925 // So we must adjust where to pick up the data to match the interpreter.
926
927 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)?
928 next_off : ld_off;
929
930 // this can be a misaligned move
931 __ movq(r, Address(saved_sp, offset));
932 } else {
933 // sign extend and use a full word?
934 __ movl(r, Address(saved_sp, ld_off));
935 }
936 } else {
937 if (!r_2->is_valid()) {
938 __ movflt(r_1->as_XMMRegister(), Address(saved_sp, ld_off));
939 } else {
940 __ movdbl(r_1->as_XMMRegister(), Address(saved_sp, next_off));
941 }
942 }
943 }
944
945 // 6243940 We might end up in handle_wrong_method if
946 // the callee is deoptimized as we race thru here. If that
947 // happens we don't want to take a safepoint because the
948 // caller frame will look interpreted and arguments are now
949 // "compiled" so it is much better to make this transition
950 // invisible to the stack walking code. Unfortunately if
951 // we try and find the callee by normal means a safepoint
952 // is possible. So we stash the desired callee in the thread
953 // and the vm will find there should this case occur.
954
955 __ movptr(Address(r15_thread, JavaThread::callee_target_offset()), rbx);
956
957 // put Method* where a c2i would expect should we end up there
958 // only needed becaus eof c2 resolve stubs return Method* as a result in
959 // rax
960 __ mov(rax, rbx);
961 __ jmp(r11);
962 }
963
964 // ---------------------------------------------------------------
965 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm,
966 int total_args_passed,
967 int comp_args_on_stack,
968 const BasicType *sig_bt,
969 const VMRegPair *regs,
970 AdapterFingerPrint* fingerprint) {
971 address i2c_entry = __ pc();
972
973 gen_i2c_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs);
974
975 // -------------------------------------------------------------------------
976 // Generate a C2I adapter. On entry we know rbx holds the Method* during calls
977 // to the interpreter. The args start out packed in the compiled layout. They
978 // need to be unpacked into the interpreter layout. This will almost always
979 // require some stack space. We grow the current (compiled) stack, then repack
980 // the args. We finally end in a jump to the generic interpreter entry point.
981 // On exit from the interpreter, the interpreter will restore our SP (lest the
982 // compiled code, which relys solely on SP and not RBP, get sick).
983
984 address c2i_unverified_entry = __ pc();
985 Label skip_fixup;
986 Label ok;
987
988 Register holder = rax;
989 Register receiver = j_rarg0;
990 Register temp = rbx;
991
992 {
993 __ load_klass(temp, receiver, rscratch1);
994 __ cmpptr(temp, Address(holder, CompiledICHolder::holder_klass_offset()));
995 __ movptr(rbx, Address(holder, CompiledICHolder::holder_metadata_offset()));
996 __ jcc(Assembler::equal, ok);
997 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
998
999 __ bind(ok);
1000 // Method might have been compiled since the call site was patched to
1001 // interpreted if that is the case treat it as a miss so we can get
1002 // the call site corrected.
1003 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD);
1004 __ jcc(Assembler::equal, skip_fixup);
1005 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
1006 }
1007
1008 address c2i_entry = __ pc();
1009
1010 // Class initialization barrier for static methods
1011 address c2i_no_clinit_check_entry = NULL;
1012 if (VM_Version::supports_fast_class_init_checks()) {
1013 Label L_skip_barrier;
1014 Register method = rbx;
1015
1016 { // Bypass the barrier for non-static methods
1017 Register flags = rscratch1;
1018 __ movl(flags, Address(method, Method::access_flags_offset()));
1019 __ testl(flags, JVM_ACC_STATIC);
1020 __ jcc(Assembler::zero, L_skip_barrier); // non-static
1021 }
1022
1023 Register klass = rscratch1;
1024 __ load_method_holder(klass, method);
1025 __ clinit_barrier(klass, r15_thread, &L_skip_barrier /*L_fast_path*/);
1026
1027 __ jump(RuntimeAddress(SharedRuntime::get_handle_wrong_method_stub())); // slow path
1028
1029 __ bind(L_skip_barrier);
1030 c2i_no_clinit_check_entry = __ pc();
1031 }
1032
1033 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
1034 bs->c2i_entry_barrier(masm);
1035
1036 gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup);
1037
1038 __ flush();
1039 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry, c2i_no_clinit_check_entry);
1040 }
1041
1042 int SharedRuntime::c_calling_convention(const BasicType *sig_bt,
1043 VMRegPair *regs,
1044 VMRegPair *regs2,
1045 int total_args_passed) {
1046 assert(regs2 == NULL, "not needed on x86");
1047 // We return the amount of VMRegImpl stack slots we need to reserve for all
1048 // the arguments NOT counting out_preserve_stack_slots.
1049
1050 // NOTE: These arrays will have to change when c1 is ported
1051 #ifdef _WIN64
1052 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = {
1053 c_rarg0, c_rarg1, c_rarg2, c_rarg3
1054 };
1055 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = {
1056 c_farg0, c_farg1, c_farg2, c_farg3
1057 };
1058 #else
1059 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = {
1077 case T_BYTE:
1078 case T_SHORT:
1079 case T_INT:
1080 if (int_args < Argument::n_int_register_parameters_c) {
1081 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg());
1082 #ifdef _WIN64
1083 fp_args++;
1084 // Allocate slots for callee to stuff register args the stack.
1085 stk_args += 2;
1086 #endif
1087 } else {
1088 regs[i].set1(VMRegImpl::stack2reg(stk_args));
1089 stk_args += 2;
1090 }
1091 break;
1092 case T_LONG:
1093 assert((i + 1) < total_args_passed && sig_bt[i + 1] == T_VOID, "expecting half");
1094 // fall through
1095 case T_OBJECT:
1096 case T_ARRAY:
1097 case T_ADDRESS:
1098 case T_METADATA:
1099 if (int_args < Argument::n_int_register_parameters_c) {
1100 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg());
1101 #ifdef _WIN64
1102 fp_args++;
1103 stk_args += 2;
1104 #endif
1105 } else {
1106 regs[i].set2(VMRegImpl::stack2reg(stk_args));
1107 stk_args += 2;
1108 }
1109 break;
1110 case T_FLOAT:
1111 if (fp_args < Argument::n_float_register_parameters_c) {
1112 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg());
1113 #ifdef _WIN64
1114 int_args++;
1115 // Allocate slots for callee to stuff register args the stack.
1116 stk_args += 2;
1933 if (out_regs[c_arg].first()->is_Register()) {
1934 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true;
1935 } else if (out_regs[c_arg].first()->is_XMMRegister()) {
1936 freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true;
1937 }
1938 #endif /* ASSERT */
1939 switch (in_sig_bt[i]) {
1940 case T_ARRAY:
1941 if (is_critical_native) {
1942 unpack_array_argument(masm, in_regs[i], in_elem_bt[i], out_regs[c_arg + 1], out_regs[c_arg]);
1943 c_arg++;
1944 #ifdef ASSERT
1945 if (out_regs[c_arg].first()->is_Register()) {
1946 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true;
1947 } else if (out_regs[c_arg].first()->is_XMMRegister()) {
1948 freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true;
1949 }
1950 #endif
1951 break;
1952 }
1953 case T_OBJECT:
1954 assert(!is_critical_native, "no oop arguments");
1955 __ object_move(map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg],
1956 ((i == 0) && (!is_static)),
1957 &receiver_offset);
1958 break;
1959 case T_VOID:
1960 break;
1961
1962 case T_FLOAT:
1963 __ float_move(in_regs[i], out_regs[c_arg]);
1964 break;
1965
1966 case T_DOUBLE:
1967 assert( i + 1 < total_in_args &&
1968 in_sig_bt[i + 1] == T_VOID &&
1969 out_sig_bt[c_arg+1] == T_VOID, "bad arg list");
1970 __ double_move(in_regs[i], out_regs[c_arg]);
1971 break;
1972
2063 assert(!is_critical_native, "unhandled");
2064
2065
2066 const int mark_word_offset = BasicLock::displaced_header_offset_in_bytes();
2067
2068 // Get the handle (the 2nd argument)
2069 __ mov(oop_handle_reg, c_rarg1);
2070
2071 // Get address of the box
2072
2073 __ lea(lock_reg, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size));
2074
2075 // Load the oop from the handle
2076 __ movptr(obj_reg, Address(oop_handle_reg, 0));
2077
2078 // Load immediate 1 into swap_reg %rax
2079 __ movl(swap_reg, 1);
2080
2081 // Load (object->mark() | 1) into swap_reg %rax
2082 __ orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
2083
2084 // Save (object->mark() | 1) into BasicLock's displaced header
2085 __ movptr(Address(lock_reg, mark_word_offset), swap_reg);
2086
2087 // src -> dest iff dest == rax else rax <- dest
2088 __ lock();
2089 __ cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
2090 __ jcc(Assembler::equal, lock_done);
2091
2092 // Hmm should this move to the slow path code area???
2093
2094 // Test if the oopMark is an obvious stack pointer, i.e.,
2095 // 1) (mark & 3) == 0, and
2096 // 2) rsp <= mark < mark + os::pagesize()
2097 // These 3 tests can be done by evaluating the following
2098 // expression: ((mark - rsp) & (3 - os::vm_page_size())),
2099 // assuming both stack pointer and pagesize have their
2100 // least significant 2 bits clear.
2101 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
2102
2122 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native);
2123 }
2124
2125 __ call(RuntimeAddress(native_func));
2126
2127 // Verify or restore cpu control state after JNI call
2128 __ restore_cpu_control_state_after_jni();
2129
2130 // Unpack native results.
2131 switch (ret_type) {
2132 case T_BOOLEAN: __ c2bool(rax); break;
2133 case T_CHAR : __ movzwl(rax, rax); break;
2134 case T_BYTE : __ sign_extend_byte (rax); break;
2135 case T_SHORT : __ sign_extend_short(rax); break;
2136 case T_INT : /* nothing to do */ break;
2137 case T_DOUBLE :
2138 case T_FLOAT :
2139 // Result is in xmm0 we'll save as needed
2140 break;
2141 case T_ARRAY: // Really a handle
2142 case T_OBJECT: // Really a handle
2143 break; // can't de-handlize until after safepoint check
2144 case T_VOID: break;
2145 case T_LONG: break;
2146 default : ShouldNotReachHere();
2147 }
2148
2149 Label after_transition;
2150
2151 // If this is a critical native, check for a safepoint or suspend request after the call.
2152 // If a safepoint is needed, transition to native, then to native_trans to handle
2153 // safepoints like the native methods that are not critical natives.
2154 if (is_critical_native) {
2155 Label needs_safepoint;
2156 __ safepoint_poll(needs_safepoint, r15_thread, false /* at_return */, false /* in_nmethod */);
2157 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0);
2158 __ jcc(Assembler::equal, after_transition);
2159 __ bind(needs_safepoint);
2160 }
2161
3876 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int)NULL_WORD);
3877 #endif
3878 // Clear the exception oop so GC no longer processes it as a root.
3879 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int)NULL_WORD);
3880
3881 // rax: exception oop
3882 // r8: exception handler
3883 // rdx: exception pc
3884 // Jump to handler
3885
3886 __ jmp(r8);
3887
3888 // Make sure all code is generated
3889 masm->flush();
3890
3891 // Set exception blob
3892 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, SimpleRuntimeFrame::framesize >> 1);
3893 }
3894 #endif // COMPILER2
3895
3896 void SharedRuntime::compute_move_order(const BasicType* in_sig_bt,
3897 int total_in_args, const VMRegPair* in_regs,
3898 int total_out_args, VMRegPair* out_regs,
3899 GrowableArray<int>& arg_order,
3900 VMRegPair tmp_vmreg) {
3901 ComputeMoveOrder order(total_in_args, in_regs,
3902 total_out_args, out_regs,
3903 in_sig_bt, arg_order, tmp_vmreg);
3904 }
|
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 "precompiled.hpp"
26 #ifndef _WINDOWS
27 #include "alloca.h"
28 #endif
29 #include "asm/macroAssembler.hpp"
30 #include "asm/macroAssembler.inline.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "code/debugInfoRec.hpp"
33 #include "code/icBuffer.hpp"
34 #include "code/nativeInst.hpp"
35 #include "code/vtableStubs.hpp"
36 #include "compiler/oopMap.hpp"
37 #include "gc/shared/collectedHeap.hpp"
38 #include "gc/shared/gcLocker.hpp"
39 #include "gc/shared/barrierSet.hpp"
40 #include "gc/shared/barrierSetAssembler.hpp"
41 #include "interpreter/interpreter.hpp"
42 #include "logging/log.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/compiledICHolder.hpp"
46 #include "oops/klass.inline.hpp"
47 #include "prims/methodHandles.hpp"
48 #include "runtime/jniHandles.hpp"
49 #include "runtime/safepointMechanism.hpp"
50 #include "runtime/sharedRuntime.hpp"
51 #include "runtime/signature.hpp"
512 case T_SHORT:
513 case T_INT:
514 if (int_args < Argument::n_int_register_parameters_j) {
515 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg());
516 } else {
517 regs[i].set1(VMRegImpl::stack2reg(stk_args));
518 stk_args += 2;
519 }
520 break;
521 case T_VOID:
522 // halves of T_LONG or T_DOUBLE
523 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half");
524 regs[i].set_bad();
525 break;
526 case T_LONG:
527 assert((i + 1) < total_args_passed && sig_bt[i + 1] == T_VOID, "expecting half");
528 // fall through
529 case T_OBJECT:
530 case T_ARRAY:
531 case T_ADDRESS:
532 case T_INLINE_TYPE:
533 if (int_args < Argument::n_int_register_parameters_j) {
534 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg());
535 } else {
536 regs[i].set2(VMRegImpl::stack2reg(stk_args));
537 stk_args += 2;
538 }
539 break;
540 case T_FLOAT:
541 if (fp_args < Argument::n_float_register_parameters_j) {
542 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg());
543 } else {
544 regs[i].set1(VMRegImpl::stack2reg(stk_args));
545 stk_args += 2;
546 }
547 break;
548 case T_DOUBLE:
549 assert((i + 1) < total_args_passed && sig_bt[i + 1] == T_VOID, "expecting half");
550 if (fp_args < Argument::n_float_register_parameters_j) {
551 regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg());
552 } else {
553 regs[i].set2(VMRegImpl::stack2reg(stk_args));
554 stk_args += 2;
555 }
556 break;
557 default:
558 ShouldNotReachHere();
559 break;
560 }
561 }
562
563 return align_up(stk_args, 2);
564 }
565
566 // Same as java_calling_convention() but for multiple return
567 // values. There's no way to store them on the stack so if we don't
568 // have enough registers, multiple values can't be returned.
569 const uint SharedRuntime::java_return_convention_max_int = Argument::n_int_register_parameters_j+1;
570 const uint SharedRuntime::java_return_convention_max_float = Argument::n_float_register_parameters_j;
571 int SharedRuntime::java_return_convention(const BasicType *sig_bt,
572 VMRegPair *regs,
573 int total_args_passed) {
574 // Create the mapping between argument positions and
575 // registers.
576 static const Register INT_ArgReg[java_return_convention_max_int] = {
577 rax, j_rarg5, j_rarg4, j_rarg3, j_rarg2, j_rarg1, j_rarg0
578 };
579 static const XMMRegister FP_ArgReg[java_return_convention_max_float] = {
580 j_farg0, j_farg1, j_farg2, j_farg3,
581 j_farg4, j_farg5, j_farg6, j_farg7
582 };
583
584
585 uint int_args = 0;
586 uint fp_args = 0;
587
588 for (int i = 0; i < total_args_passed; i++) {
589 switch (sig_bt[i]) {
590 case T_BOOLEAN:
591 case T_CHAR:
592 case T_BYTE:
593 case T_SHORT:
594 case T_INT:
595 if (int_args < Argument::n_int_register_parameters_j+1) {
596 regs[i].set1(INT_ArgReg[int_args]->as_VMReg());
597 int_args++;
598 } else {
599 return -1;
600 }
601 break;
602 case T_VOID:
603 // halves of T_LONG or T_DOUBLE
604 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half");
605 regs[i].set_bad();
606 break;
607 case T_LONG:
608 assert(sig_bt[i + 1] == T_VOID, "expecting half");
609 // fall through
610 case T_OBJECT:
611 case T_INLINE_TYPE:
612 case T_ARRAY:
613 case T_ADDRESS:
614 case T_METADATA:
615 if (int_args < Argument::n_int_register_parameters_j+1) {
616 regs[i].set2(INT_ArgReg[int_args]->as_VMReg());
617 int_args++;
618 } else {
619 return -1;
620 }
621 break;
622 case T_FLOAT:
623 if (fp_args < Argument::n_float_register_parameters_j) {
624 regs[i].set1(FP_ArgReg[fp_args]->as_VMReg());
625 fp_args++;
626 } else {
627 return -1;
628 }
629 break;
630 case T_DOUBLE:
631 assert(sig_bt[i + 1] == T_VOID, "expecting half");
632 if (fp_args < Argument::n_float_register_parameters_j) {
633 regs[i].set2(FP_ArgReg[fp_args]->as_VMReg());
634 fp_args++;
635 } else {
636 return -1;
637 }
638 break;
639 default:
640 ShouldNotReachHere();
641 break;
642 }
643 }
644
645 return int_args + fp_args;
646 }
647
648 // Patch the callers callsite with entry to compiled code if it exists.
649 static void patch_callers_callsite(MacroAssembler *masm) {
650 Label L;
651 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD);
652 __ jcc(Assembler::equal, L);
653
654 // Save the current stack pointer
655 __ mov(r13, rsp);
656 // Schedule the branch target address early.
657 // Call into the VM to patch the caller, then jump to compiled callee
658 // rax isn't live so capture return address while we easily can
659 __ movptr(rax, Address(rsp, 0));
660
661 // align stack so push_CPU_state doesn't fault
662 __ andptr(rsp, -(StackAlignmentInBytes));
663 __ push_CPU_state();
664 __ vzeroupper();
665 // VM needs caller's callsite
666 // VM needs target method
667 // This needs to be a long call since we will relocate this adapter to
670 // Allocate argument register save area
671 if (frame::arg_reg_save_area_bytes != 0) {
672 __ subptr(rsp, frame::arg_reg_save_area_bytes);
673 }
674 __ mov(c_rarg0, rbx);
675 __ mov(c_rarg1, rax);
676 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite)));
677
678 // De-allocate argument register save area
679 if (frame::arg_reg_save_area_bytes != 0) {
680 __ addptr(rsp, frame::arg_reg_save_area_bytes);
681 }
682
683 __ vzeroupper();
684 __ pop_CPU_state();
685 // restore sp
686 __ mov(rsp, r13);
687 __ bind(L);
688 }
689
690 // For each inline type argument, sig includes the list of fields of
691 // the inline type. This utility function computes the number of
692 // arguments for the call if inline types are passed by reference (the
693 // calling convention the interpreter expects).
694 static int compute_total_args_passed_int(const GrowableArray<SigEntry>* sig_extended) {
695 int total_args_passed = 0;
696 if (InlineTypePassFieldsAsArgs) {
697 for (int i = 0; i < sig_extended->length(); i++) {
698 BasicType bt = sig_extended->at(i)._bt;
699 if (bt == T_INLINE_TYPE) {
700 // In sig_extended, an inline type argument starts with:
701 // T_INLINE_TYPE, followed by the types of the fields of the
702 // inline type and T_VOID to mark the end of the value
703 // type. Inline types are flattened so, for instance, in the
704 // case of an inline type with an int field and an inline type
705 // field that itself has 2 fields, an int and a long:
706 // T_INLINE_TYPE T_INT T_INLINE_TYPE T_INT T_LONG T_VOID (second
707 // slot for the T_LONG) T_VOID (inner T_INLINE_TYPE) T_VOID
708 // (outer T_INLINE_TYPE)
709 total_args_passed++;
710 int vt = 1;
711 do {
712 i++;
713 BasicType bt = sig_extended->at(i)._bt;
714 BasicType prev_bt = sig_extended->at(i-1)._bt;
715 if (bt == T_INLINE_TYPE) {
716 vt++;
717 } else if (bt == T_VOID &&
718 prev_bt != T_LONG &&
719 prev_bt != T_DOUBLE) {
720 vt--;
721 }
722 } while (vt != 0);
723 } else {
724 total_args_passed++;
725 }
726 }
727 } else {
728 total_args_passed = sig_extended->length();
729 }
730 return total_args_passed;
731 }
732
733
734 static void gen_c2i_adapter_helper(MacroAssembler* masm,
735 BasicType bt,
736 BasicType prev_bt,
737 size_t size_in_bytes,
738 const VMRegPair& reg_pair,
739 const Address& to,
740 int extraspace,
741 bool is_oop) {
742 assert(bt != T_INLINE_TYPE || !InlineTypePassFieldsAsArgs, "no inline type here");
743 if (bt == T_VOID) {
744 assert(prev_bt == T_LONG || prev_bt == T_DOUBLE, "missing half");
745 return;
746 }
747
748 // Say 4 args:
749 // i st_off
750 // 0 32 T_LONG
751 // 1 24 T_VOID
752 // 2 16 T_OBJECT
753 // 3 8 T_BOOL
754 // - 0 return address
755 //
756 // However to make thing extra confusing. Because we can fit a long/double in
757 // a single slot on a 64 bt vm and it would be silly to break them up, the interpreter
758 // leaves one slot empty and only stores to a single slot. In this case the
759 // slot that is occupied is the T_VOID slot. See I said it was confusing.
760
761 bool wide = (size_in_bytes == wordSize);
762 VMReg r_1 = reg_pair.first();
763 VMReg r_2 = reg_pair.second();
764 assert(r_2->is_valid() == wide, "invalid size");
765 if (!r_1->is_valid()) {
766 assert(!r_2->is_valid(), "must be invalid");
767 return;
768 }
769
770 if (!r_1->is_XMMRegister()) {
771 Register val = rax;
772 if (r_1->is_stack()) {
773 int ld_off = r_1->reg2stack() * VMRegImpl::stack_slot_size + extraspace;
774 __ load_sized_value(val, Address(rsp, ld_off), size_in_bytes, /* is_signed */ false);
775 } else {
776 val = r_1->as_Register();
777 }
778 assert_different_registers(to.base(), val, rscratch1);
779 if (is_oop) {
780 __ push(r13);
781 __ push(rbx);
782 __ store_heap_oop(to, val, rscratch1, r13, rbx, IN_HEAP | ACCESS_WRITE | IS_DEST_UNINITIALIZED);
783 __ pop(rbx);
784 __ pop(r13);
785 } else {
786 __ store_sized_value(to, val, size_in_bytes);
787 }
788 } else {
789 if (wide) {
790 __ movdbl(to, r_1->as_XMMRegister());
791 } else {
792 __ movflt(to, r_1->as_XMMRegister());
793 }
794 }
795 }
796
797 static void gen_c2i_adapter(MacroAssembler *masm,
798 const GrowableArray<SigEntry>* sig_extended,
799 const VMRegPair *regs,
800 Label& skip_fixup,
801 address start,
802 OopMapSet* oop_maps,
803 int& frame_complete,
804 int& frame_size_in_words,
805 bool alloc_inline_receiver) {
806 // Before we get into the guts of the C2I adapter, see if we should be here
807 // at all. We've come from compiled code and are attempting to jump to the
808 // interpreter, which means the caller made a static call to get here
809 // (vcalls always get a compiled target if there is one). Check for a
810 // compiled target. If there is one, we need to patch the caller's call.
811 patch_callers_callsite(masm);
812
813 __ bind(skip_fixup);
814
815 if (InlineTypePassFieldsAsArgs) {
816 // Is there an inline type argument?
817 bool has_inline_argument = false;
818 for (int i = 0; i < sig_extended->length() && !has_inline_argument; i++) {
819 has_inline_argument = (sig_extended->at(i)._bt == T_INLINE_TYPE);
820 }
821 if (has_inline_argument) {
822 // There is at least an inline type argument: we're coming from
823 // compiled code so we have no buffers to back the inline types.
824 // Allocate the buffers here with a runtime call.
825 OopMap* map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words, /*save_vectors*/ false);
826
827 frame_complete = __ offset();
828
829 __ set_last_Java_frame(noreg, noreg, NULL);
830
831 __ mov(c_rarg0, r15_thread);
832 __ mov(c_rarg1, rbx);
833 __ mov64(c_rarg2, (int64_t)alloc_inline_receiver);
834 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::allocate_inline_types)));
835
836 oop_maps->add_gc_map((int)(__ pc() - start), map);
837 __ reset_last_Java_frame(false);
838
839 RegisterSaver::restore_live_registers(masm);
840
841 Label no_exception;
842 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
843 __ jcc(Assembler::equal, no_exception);
844
845 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), (int)NULL_WORD);
846 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset()));
847 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
848
849 __ bind(no_exception);
850
851 // We get an array of objects from the runtime call
852 __ get_vm_result(rscratch2, r15_thread); // Use rscratch2 (r11) as temporary because rscratch1 (r10) is trashed by movptr()
853 __ get_vm_result_2(rbx, r15_thread); // TODO: required to keep the callee Method live?
854 }
855 }
856
857 // Since all args are passed on the stack, total_args_passed *
858 // Interpreter::stackElementSize is the space we need. Plus 1 because
859 // we also account for the return address location since
860 // we store it first rather than hold it in rax across all the shuffling
861 int total_args_passed = compute_total_args_passed_int(sig_extended);
862 int extraspace = (total_args_passed * Interpreter::stackElementSize) + wordSize;
863
864 // stack is aligned, keep it that way
865 extraspace = align_up(extraspace, 2*wordSize);
866
867 // Get return address
868 __ pop(rax);
869
870 // set senderSP value
871 __ mov(r13, rsp);
872
873 __ subptr(rsp, extraspace);
874
875 // Store the return address in the expected location
876 __ movptr(Address(rsp, 0), rax);
877
878 // Now write the args into the outgoing interpreter space
879
880 // next_arg_comp is the next argument from the compiler point of
881 // view (inline type fields are passed in registers/on the stack). In
882 // sig_extended, an inline type argument starts with: T_INLINE_TYPE,
883 // followed by the types of the fields of the inline type and T_VOID
884 // to mark the end of the inline type. ignored counts the number of
885 // T_INLINE_TYPE/T_VOID. next_vt_arg is the next inline type argument:
886 // used to get the buffer for that argument from the pool of buffers
887 // we allocated above and want to pass to the
888 // interpreter. next_arg_int is the next argument from the
889 // interpreter point of view (inline types are passed by reference).
890 for (int next_arg_comp = 0, ignored = 0, next_vt_arg = 0, next_arg_int = 0;
891 next_arg_comp < sig_extended->length(); next_arg_comp++) {
892 assert(ignored <= next_arg_comp, "shouldn't skip over more slots than there are arguments");
893 assert(next_arg_int <= total_args_passed, "more arguments for the interpreter than expected?");
894 BasicType bt = sig_extended->at(next_arg_comp)._bt;
895 int st_off = (total_args_passed - next_arg_int) * Interpreter::stackElementSize;
896 if (!InlineTypePassFieldsAsArgs || bt != T_INLINE_TYPE) {
897 int next_off = st_off - Interpreter::stackElementSize;
898 const int offset = (bt == T_LONG || bt == T_DOUBLE) ? next_off : st_off;
899 const VMRegPair reg_pair = regs[next_arg_comp-ignored];
900 size_t size_in_bytes = reg_pair.second()->is_valid() ? 8 : 4;
901 gen_c2i_adapter_helper(masm, bt, next_arg_comp > 0 ? sig_extended->at(next_arg_comp-1)._bt : T_ILLEGAL,
902 size_in_bytes, reg_pair, Address(rsp, offset), extraspace, false);
903 next_arg_int++;
904 #ifdef ASSERT
905 if (bt == T_LONG || bt == T_DOUBLE) {
906 // Overwrite the unused slot with known junk
907 __ mov64(rax, CONST64(0xdeadffffdeadaaaa));
908 __ movptr(Address(rsp, st_off), rax);
909 }
910 #endif /* ASSERT */
911 } else {
912 ignored++;
913 // get the buffer from the just allocated pool of buffers
914 int index = arrayOopDesc::base_offset_in_bytes(T_OBJECT) + next_vt_arg * type2aelembytes(T_INLINE_TYPE);
915 __ load_heap_oop(r14, Address(rscratch2, index));
916 next_vt_arg++; next_arg_int++;
917 int vt = 1;
918 // write fields we get from compiled code in registers/stack
919 // slots to the buffer: we know we are done with that inline type
920 // argument when we hit the T_VOID that acts as an end of inline
921 // type delimiter for this inline type. Inline types are flattened
922 // so we might encounter embedded inline types. Each entry in
923 // sig_extended contains a field offset in the buffer.
924 do {
925 next_arg_comp++;
926 BasicType bt = sig_extended->at(next_arg_comp)._bt;
927 BasicType prev_bt = sig_extended->at(next_arg_comp-1)._bt;
928 if (bt == T_INLINE_TYPE) {
929 vt++;
930 ignored++;
931 } else if (bt == T_VOID &&
932 prev_bt != T_LONG &&
933 prev_bt != T_DOUBLE) {
934 vt--;
935 ignored++;
936 } else {
937 int off = sig_extended->at(next_arg_comp)._offset;
938 assert(off > 0, "offset in object should be positive");
939 size_t size_in_bytes = is_java_primitive(bt) ? type2aelembytes(bt) : wordSize;
940 bool is_oop = is_reference_type(bt);
941 gen_c2i_adapter_helper(masm, bt, next_arg_comp > 0 ? sig_extended->at(next_arg_comp-1)._bt : T_ILLEGAL,
942 size_in_bytes, regs[next_arg_comp-ignored], Address(r14, off), extraspace, is_oop);
943 }
944 } while (vt != 0);
945 // pass the buffer to the interpreter
946 __ movptr(Address(rsp, st_off), r14);
947 }
948 }
949
950 // Schedule the branch target address early.
951 __ movptr(rcx, Address(rbx, in_bytes(Method::interpreter_entry_offset())));
952 __ jmp(rcx);
953 }
954
955 static void range_check(MacroAssembler* masm, Register pc_reg, Register temp_reg,
956 address code_start, address code_end,
957 Label& L_ok) {
958 Label L_fail;
959 __ lea(temp_reg, ExternalAddress(code_start));
960 __ cmpptr(pc_reg, temp_reg);
961 __ jcc(Assembler::belowEqual, L_fail);
962 __ lea(temp_reg, ExternalAddress(code_end));
963 __ cmpptr(pc_reg, temp_reg);
964 __ jcc(Assembler::below, L_ok);
965 __ bind(L_fail);
966 }
967
968 void SharedRuntime::gen_i2c_adapter(MacroAssembler *masm,
969 int comp_args_on_stack,
970 const GrowableArray<SigEntry>* sig,
971 const VMRegPair *regs) {
972
973 // Note: r13 contains the senderSP on entry. We must preserve it since
974 // we may do a i2c -> c2i transition if we lose a race where compiled
975 // code goes non-entrant while we get args ready.
976 // In addition we use r13 to locate all the interpreter args as
977 // we must align the stack to 16 bytes on an i2c entry else we
978 // lose alignment we expect in all compiled code and register
979 // save code can segv when fxsave instructions find improperly
980 // aligned stack pointer.
981
982 // Adapters can be frameless because they do not require the caller
983 // to perform additional cleanup work, such as correcting the stack pointer.
984 // An i2c adapter is frameless because the *caller* frame, which is interpreted,
985 // routinely repairs its own stack pointer (from interpreter_frame_last_sp),
986 // even if a callee has modified the stack pointer.
987 // A c2i adapter is frameless because the *callee* frame, which is interpreted,
988 // routinely repairs its caller's stack pointer (from sender_sp, which is set
989 // up via the senderSP register).
990 // In other words, if *either* the caller or callee is interpreted, we can
1042 comp_words_on_stack = align_up(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord;
1043 // Round up to miminum stack alignment, in wordSize
1044 comp_words_on_stack = align_up(comp_words_on_stack, 2);
1045 __ subptr(rsp, comp_words_on_stack * wordSize);
1046 }
1047
1048
1049 // Ensure compiled code always sees stack at proper alignment
1050 __ andptr(rsp, -16);
1051
1052 // push the return address and misalign the stack that youngest frame always sees
1053 // as far as the placement of the call instruction
1054 __ push(rax);
1055
1056 // Put saved SP in another register
1057 const Register saved_sp = rax;
1058 __ movptr(saved_sp, r11);
1059
1060 // Will jump to the compiled code just as if compiled code was doing it.
1061 // Pre-load the register-jump target early, to schedule it better.
1062 __ movptr(r11, Address(rbx, in_bytes(Method::from_compiled_inline_offset())));
1063
1064 #if INCLUDE_JVMCI
1065 if (EnableJVMCI) {
1066 // check if this call should be routed towards a specific entry point
1067 __ cmpptr(Address(r15_thread, in_bytes(JavaThread::jvmci_alternate_call_target_offset())), 0);
1068 Label no_alternative_target;
1069 __ jcc(Assembler::equal, no_alternative_target);
1070 __ movptr(r11, Address(r15_thread, in_bytes(JavaThread::jvmci_alternate_call_target_offset())));
1071 __ movptr(Address(r15_thread, in_bytes(JavaThread::jvmci_alternate_call_target_offset())), 0);
1072 __ bind(no_alternative_target);
1073 }
1074 #endif // INCLUDE_JVMCI
1075
1076 int total_args_passed = sig->length();
1077
1078 // Now generate the shuffle code. Pick up all register args and move the
1079 // rest through the floating point stack top.
1080 for (int i = 0; i < total_args_passed; i++) {
1081 BasicType bt = sig->at(i)._bt;
1082 assert(bt != T_INLINE_TYPE, "i2c adapter doesn't unpack inline type args");
1083 if (bt == T_VOID) {
1084 // Longs and doubles are passed in native word order, but misaligned
1085 // in the 32-bit build.
1086 BasicType prev_bt = (i > 0) ? sig->at(i-1)._bt : T_ILLEGAL;
1087 assert(i > 0 && (prev_bt == T_LONG || prev_bt == T_DOUBLE), "missing half");
1088 continue;
1089 }
1090
1091 // Pick up 0, 1 or 2 words from SP+offset.
1092
1093 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(),
1094 "scrambled load targets?");
1095 // Load in argument order going down.
1096 int ld_off = (total_args_passed - i)*Interpreter::stackElementSize;
1097 // Point to interpreter value (vs. tag)
1098 int next_off = ld_off - Interpreter::stackElementSize;
1099 //
1100 //
1101 //
1102 VMReg r_1 = regs[i].first();
1103 VMReg r_2 = regs[i].second();
1104 if (!r_1->is_valid()) {
1105 assert(!r_2->is_valid(), "");
1106 continue;
1107 }
1109 // Convert stack slot to an SP offset (+ wordSize to account for return address )
1110 int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize;
1111
1112 // We can use r13 as a temp here because compiled code doesn't need r13 as an input
1113 // and if we end up going thru a c2i because of a miss a reasonable value of r13
1114 // will be generated.
1115 if (!r_2->is_valid()) {
1116 // sign extend???
1117 __ movl(r13, Address(saved_sp, ld_off));
1118 __ movptr(Address(rsp, st_off), r13);
1119 } else {
1120 //
1121 // We are using two optoregs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE
1122 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case
1123 // So we must adjust where to pick up the data to match the interpreter.
1124 //
1125 // Interpreter local[n] == MSW, local[n+1] == LSW however locals
1126 // are accessed as negative so LSW is at LOW address
1127
1128 // ld_off is MSW so get LSW
1129 const int offset = (bt==T_LONG||bt==T_DOUBLE)?
1130 next_off : ld_off;
1131 __ movq(r13, Address(saved_sp, offset));
1132 // st_off is LSW (i.e. reg.first())
1133 __ movq(Address(rsp, st_off), r13);
1134 }
1135 } else if (r_1->is_Register()) { // Register argument
1136 Register r = r_1->as_Register();
1137 assert(r != rax, "must be different");
1138 if (r_2->is_valid()) {
1139 //
1140 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE
1141 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case
1142 // So we must adjust where to pick up the data to match the interpreter.
1143
1144 const int offset = (bt==T_LONG||bt==T_DOUBLE)?
1145 next_off : ld_off;
1146
1147 // this can be a misaligned move
1148 __ movq(r, Address(saved_sp, offset));
1149 } else {
1150 // sign extend and use a full word?
1151 __ movl(r, Address(saved_sp, ld_off));
1152 }
1153 } else {
1154 if (!r_2->is_valid()) {
1155 __ movflt(r_1->as_XMMRegister(), Address(saved_sp, ld_off));
1156 } else {
1157 __ movdbl(r_1->as_XMMRegister(), Address(saved_sp, next_off));
1158 }
1159 }
1160 }
1161
1162 // 6243940 We might end up in handle_wrong_method if
1163 // the callee is deoptimized as we race thru here. If that
1164 // happens we don't want to take a safepoint because the
1165 // caller frame will look interpreted and arguments are now
1166 // "compiled" so it is much better to make this transition
1167 // invisible to the stack walking code. Unfortunately if
1168 // we try and find the callee by normal means a safepoint
1169 // is possible. So we stash the desired callee in the thread
1170 // and the vm will find there should this case occur.
1171
1172 __ movptr(Address(r15_thread, JavaThread::callee_target_offset()), rbx);
1173
1174 // put Method* where a c2i would expect should we end up there
1175 // only needed because of c2 resolve stubs return Method* as a result in
1176 // rax
1177 __ mov(rax, rbx);
1178 __ jmp(r11);
1179 }
1180
1181 static void gen_inline_cache_check(MacroAssembler *masm, Label& skip_fixup) {
1182 Label ok;
1183
1184 Register holder = rax;
1185 Register receiver = j_rarg0;
1186 Register temp = rbx;
1187
1188 __ load_klass(temp, receiver, rscratch1);
1189 __ cmpptr(temp, Address(holder, CompiledICHolder::holder_klass_offset()));
1190 __ movptr(rbx, Address(holder, CompiledICHolder::holder_metadata_offset()));
1191 __ jcc(Assembler::equal, ok);
1192 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
1193
1194 __ bind(ok);
1195 // Method might have been compiled since the call site was patched to
1196 // interpreted if that is the case treat it as a miss so we can get
1197 // the call site corrected.
1198 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD);
1199 __ jcc(Assembler::equal, skip_fixup);
1200 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
1201 }
1202
1203 // ---------------------------------------------------------------
1204 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler* masm,
1205 int comp_args_on_stack,
1206 const GrowableArray<SigEntry>* sig,
1207 const VMRegPair* regs,
1208 const GrowableArray<SigEntry>* sig_cc,
1209 const VMRegPair* regs_cc,
1210 const GrowableArray<SigEntry>* sig_cc_ro,
1211 const VMRegPair* regs_cc_ro,
1212 AdapterFingerPrint* fingerprint,
1213 AdapterBlob*& new_adapter,
1214 bool allocate_code_blob) {
1215 address i2c_entry = __ pc();
1216 gen_i2c_adapter(masm, comp_args_on_stack, sig, regs);
1217
1218 // -------------------------------------------------------------------------
1219 // Generate a C2I adapter. On entry we know rbx holds the Method* during calls
1220 // to the interpreter. The args start out packed in the compiled layout. They
1221 // need to be unpacked into the interpreter layout. This will almost always
1222 // require some stack space. We grow the current (compiled) stack, then repack
1223 // the args. We finally end in a jump to the generic interpreter entry point.
1224 // On exit from the interpreter, the interpreter will restore our SP (lest the
1225 // compiled code, which relys solely on SP and not RBP, get sick).
1226
1227 address c2i_unverified_entry = __ pc();
1228 Label skip_fixup;
1229
1230 gen_inline_cache_check(masm, skip_fixup);
1231
1232 OopMapSet* oop_maps = new OopMapSet();
1233 int frame_complete = CodeOffsets::frame_never_safe;
1234 int frame_size_in_words = 0;
1235
1236 // Scalarized c2i adapter with non-scalarized receiver (i.e., don't pack receiver)
1237 address c2i_inline_ro_entry = __ pc();
1238 if (regs_cc != regs_cc_ro) {
1239 gen_c2i_adapter(masm, sig_cc_ro, regs_cc_ro, skip_fixup, i2c_entry, oop_maps, frame_complete, frame_size_in_words, false);
1240 skip_fixup.reset();
1241 }
1242
1243 // Scalarized c2i adapter
1244 address c2i_entry = __ pc();
1245
1246 // Class initialization barrier for static methods
1247 address c2i_no_clinit_check_entry = NULL;
1248 if (VM_Version::supports_fast_class_init_checks()) {
1249 Label L_skip_barrier;
1250 Register method = rbx;
1251
1252 { // Bypass the barrier for non-static methods
1253 Register flags = rscratch1;
1254 __ movl(flags, Address(method, Method::access_flags_offset()));
1255 __ testl(flags, JVM_ACC_STATIC);
1256 __ jcc(Assembler::zero, L_skip_barrier); // non-static
1257 }
1258
1259 Register klass = rscratch1;
1260 __ load_method_holder(klass, method);
1261 __ clinit_barrier(klass, r15_thread, &L_skip_barrier /*L_fast_path*/);
1262
1263 __ jump(RuntimeAddress(SharedRuntime::get_handle_wrong_method_stub())); // slow path
1264
1265 __ bind(L_skip_barrier);
1266 c2i_no_clinit_check_entry = __ pc();
1267 }
1268
1269 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
1270 bs->c2i_entry_barrier(masm);
1271
1272 gen_c2i_adapter(masm, sig_cc, regs_cc, skip_fixup, i2c_entry, oop_maps, frame_complete, frame_size_in_words, true);
1273
1274 address c2i_unverified_inline_entry = c2i_unverified_entry;
1275
1276 // Non-scalarized c2i adapter
1277 address c2i_inline_entry = c2i_entry;
1278 if (regs != regs_cc) {
1279 Label inline_entry_skip_fixup;
1280 c2i_unverified_inline_entry = __ pc();
1281 gen_inline_cache_check(masm, inline_entry_skip_fixup);
1282
1283 c2i_inline_entry = __ pc();
1284 gen_c2i_adapter(masm, sig, regs, inline_entry_skip_fixup, i2c_entry, oop_maps, frame_complete, frame_size_in_words, false);
1285 }
1286
1287 __ flush();
1288
1289 // The c2i adapters might safepoint and trigger a GC. The caller must make sure that
1290 // the GC knows about the location of oop argument locations passed to the c2i adapter.
1291 if (allocate_code_blob) {
1292 bool caller_must_gc_arguments = (regs != regs_cc);
1293 new_adapter = AdapterBlob::create(masm->code(), frame_complete, frame_size_in_words, oop_maps, caller_must_gc_arguments);
1294 }
1295
1296 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_inline_entry, c2i_inline_ro_entry, c2i_unverified_entry, c2i_unverified_inline_entry, c2i_no_clinit_check_entry);
1297 }
1298
1299 int SharedRuntime::c_calling_convention(const BasicType *sig_bt,
1300 VMRegPair *regs,
1301 VMRegPair *regs2,
1302 int total_args_passed) {
1303 assert(regs2 == NULL, "not needed on x86");
1304 // We return the amount of VMRegImpl stack slots we need to reserve for all
1305 // the arguments NOT counting out_preserve_stack_slots.
1306
1307 // NOTE: These arrays will have to change when c1 is ported
1308 #ifdef _WIN64
1309 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = {
1310 c_rarg0, c_rarg1, c_rarg2, c_rarg3
1311 };
1312 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = {
1313 c_farg0, c_farg1, c_farg2, c_farg3
1314 };
1315 #else
1316 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = {
1334 case T_BYTE:
1335 case T_SHORT:
1336 case T_INT:
1337 if (int_args < Argument::n_int_register_parameters_c) {
1338 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg());
1339 #ifdef _WIN64
1340 fp_args++;
1341 // Allocate slots for callee to stuff register args the stack.
1342 stk_args += 2;
1343 #endif
1344 } else {
1345 regs[i].set1(VMRegImpl::stack2reg(stk_args));
1346 stk_args += 2;
1347 }
1348 break;
1349 case T_LONG:
1350 assert((i + 1) < total_args_passed && sig_bt[i + 1] == T_VOID, "expecting half");
1351 // fall through
1352 case T_OBJECT:
1353 case T_ARRAY:
1354 case T_INLINE_TYPE:
1355 case T_ADDRESS:
1356 case T_METADATA:
1357 if (int_args < Argument::n_int_register_parameters_c) {
1358 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg());
1359 #ifdef _WIN64
1360 fp_args++;
1361 stk_args += 2;
1362 #endif
1363 } else {
1364 regs[i].set2(VMRegImpl::stack2reg(stk_args));
1365 stk_args += 2;
1366 }
1367 break;
1368 case T_FLOAT:
1369 if (fp_args < Argument::n_float_register_parameters_c) {
1370 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg());
1371 #ifdef _WIN64
1372 int_args++;
1373 // Allocate slots for callee to stuff register args the stack.
1374 stk_args += 2;
2191 if (out_regs[c_arg].first()->is_Register()) {
2192 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true;
2193 } else if (out_regs[c_arg].first()->is_XMMRegister()) {
2194 freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true;
2195 }
2196 #endif /* ASSERT */
2197 switch (in_sig_bt[i]) {
2198 case T_ARRAY:
2199 if (is_critical_native) {
2200 unpack_array_argument(masm, in_regs[i], in_elem_bt[i], out_regs[c_arg + 1], out_regs[c_arg]);
2201 c_arg++;
2202 #ifdef ASSERT
2203 if (out_regs[c_arg].first()->is_Register()) {
2204 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true;
2205 } else if (out_regs[c_arg].first()->is_XMMRegister()) {
2206 freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true;
2207 }
2208 #endif
2209 break;
2210 }
2211 case T_INLINE_TYPE:
2212 case T_OBJECT:
2213 assert(!is_critical_native, "no oop arguments");
2214 __ object_move(map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg],
2215 ((i == 0) && (!is_static)),
2216 &receiver_offset);
2217 break;
2218 case T_VOID:
2219 break;
2220
2221 case T_FLOAT:
2222 __ float_move(in_regs[i], out_regs[c_arg]);
2223 break;
2224
2225 case T_DOUBLE:
2226 assert( i + 1 < total_in_args &&
2227 in_sig_bt[i + 1] == T_VOID &&
2228 out_sig_bt[c_arg+1] == T_VOID, "bad arg list");
2229 __ double_move(in_regs[i], out_regs[c_arg]);
2230 break;
2231
2322 assert(!is_critical_native, "unhandled");
2323
2324
2325 const int mark_word_offset = BasicLock::displaced_header_offset_in_bytes();
2326
2327 // Get the handle (the 2nd argument)
2328 __ mov(oop_handle_reg, c_rarg1);
2329
2330 // Get address of the box
2331
2332 __ lea(lock_reg, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size));
2333
2334 // Load the oop from the handle
2335 __ movptr(obj_reg, Address(oop_handle_reg, 0));
2336
2337 // Load immediate 1 into swap_reg %rax
2338 __ movl(swap_reg, 1);
2339
2340 // Load (object->mark() | 1) into swap_reg %rax
2341 __ orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
2342 if (EnableValhalla) {
2343 // Mask inline_type bit such that we go to the slow path if object is an inline type
2344 __ andptr(swap_reg, ~((int) markWord::inline_type_bit_in_place));
2345 }
2346
2347
2348 // Save (object->mark() | 1) into BasicLock's displaced header
2349 __ movptr(Address(lock_reg, mark_word_offset), swap_reg);
2350
2351 // src -> dest iff dest == rax else rax <- dest
2352 __ lock();
2353 __ cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
2354 __ jcc(Assembler::equal, lock_done);
2355
2356 // Hmm should this move to the slow path code area???
2357
2358 // Test if the oopMark is an obvious stack pointer, i.e.,
2359 // 1) (mark & 3) == 0, and
2360 // 2) rsp <= mark < mark + os::pagesize()
2361 // These 3 tests can be done by evaluating the following
2362 // expression: ((mark - rsp) & (3 - os::vm_page_size())),
2363 // assuming both stack pointer and pagesize have their
2364 // least significant 2 bits clear.
2365 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
2366
2386 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native);
2387 }
2388
2389 __ call(RuntimeAddress(native_func));
2390
2391 // Verify or restore cpu control state after JNI call
2392 __ restore_cpu_control_state_after_jni();
2393
2394 // Unpack native results.
2395 switch (ret_type) {
2396 case T_BOOLEAN: __ c2bool(rax); break;
2397 case T_CHAR : __ movzwl(rax, rax); break;
2398 case T_BYTE : __ sign_extend_byte (rax); break;
2399 case T_SHORT : __ sign_extend_short(rax); break;
2400 case T_INT : /* nothing to do */ break;
2401 case T_DOUBLE :
2402 case T_FLOAT :
2403 // Result is in xmm0 we'll save as needed
2404 break;
2405 case T_ARRAY: // Really a handle
2406 case T_INLINE_TYPE: // Really a handle
2407 case T_OBJECT: // Really a handle
2408 break; // can't de-handlize until after safepoint check
2409 case T_VOID: break;
2410 case T_LONG: break;
2411 default : ShouldNotReachHere();
2412 }
2413
2414 Label after_transition;
2415
2416 // If this is a critical native, check for a safepoint or suspend request after the call.
2417 // If a safepoint is needed, transition to native, then to native_trans to handle
2418 // safepoints like the native methods that are not critical natives.
2419 if (is_critical_native) {
2420 Label needs_safepoint;
2421 __ safepoint_poll(needs_safepoint, r15_thread, false /* at_return */, false /* in_nmethod */);
2422 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0);
2423 __ jcc(Assembler::equal, after_transition);
2424 __ bind(needs_safepoint);
2425 }
2426
4141 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int)NULL_WORD);
4142 #endif
4143 // Clear the exception oop so GC no longer processes it as a root.
4144 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int)NULL_WORD);
4145
4146 // rax: exception oop
4147 // r8: exception handler
4148 // rdx: exception pc
4149 // Jump to handler
4150
4151 __ jmp(r8);
4152
4153 // Make sure all code is generated
4154 masm->flush();
4155
4156 // Set exception blob
4157 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, SimpleRuntimeFrame::framesize >> 1);
4158 }
4159 #endif // COMPILER2
4160
4161 BufferedInlineTypeBlob* SharedRuntime::generate_buffered_inline_type_adapter(const InlineKlass* vk) {
4162 BufferBlob* buf = BufferBlob::create("inline types pack/unpack", 16 * K);
4163 CodeBuffer buffer(buf);
4164 short buffer_locs[20];
4165 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
4166 sizeof(buffer_locs)/sizeof(relocInfo));
4167
4168 MacroAssembler* masm = new MacroAssembler(&buffer);
4169
4170 const Array<SigEntry>* sig_vk = vk->extended_sig();
4171 const Array<VMRegPair>* regs = vk->return_regs();
4172
4173 int pack_fields_jobject_off = __ offset();
4174 // Resolve pre-allocated buffer from JNI handle.
4175 // We cannot do this in generate_call_stub() because it requires GC code to be initialized.
4176 __ movptr(rax, Address(r13, 0));
4177 __ resolve_jobject(rax /* value */,
4178 r15_thread /* thread */,
4179 r12 /* tmp */);
4180 __ movptr(Address(r13, 0), rax);
4181
4182 int pack_fields_off = __ offset();
4183
4184 int j = 1;
4185 for (int i = 0; i < sig_vk->length(); i++) {
4186 BasicType bt = sig_vk->at(i)._bt;
4187 if (bt == T_INLINE_TYPE) {
4188 continue;
4189 }
4190 if (bt == T_VOID) {
4191 if (sig_vk->at(i-1)._bt == T_LONG ||
4192 sig_vk->at(i-1)._bt == T_DOUBLE) {
4193 j++;
4194 }
4195 continue;
4196 }
4197 int off = sig_vk->at(i)._offset;
4198 assert(off > 0, "offset in object should be positive");
4199 VMRegPair pair = regs->at(j);
4200 VMReg r_1 = pair.first();
4201 VMReg r_2 = pair.second();
4202 Address to(rax, off);
4203 if (bt == T_FLOAT) {
4204 __ movflt(to, r_1->as_XMMRegister());
4205 } else if (bt == T_DOUBLE) {
4206 __ movdbl(to, r_1->as_XMMRegister());
4207 } else {
4208 Register val = r_1->as_Register();
4209 assert_different_registers(to.base(), val, r14, r13, rbx, rscratch1);
4210 if (is_reference_type(bt)) {
4211 __ store_heap_oop(to, val, r14, r13, rbx, IN_HEAP | ACCESS_WRITE | IS_DEST_UNINITIALIZED);
4212 } else {
4213 __ store_sized_value(to, r_1->as_Register(), type2aelembytes(bt));
4214 }
4215 }
4216 j++;
4217 }
4218 assert(j == regs->length(), "missed a field?");
4219
4220 __ ret(0);
4221
4222 int unpack_fields_off = __ offset();
4223
4224 j = 1;
4225 for (int i = 0; i < sig_vk->length(); i++) {
4226 BasicType bt = sig_vk->at(i)._bt;
4227 if (bt == T_INLINE_TYPE) {
4228 continue;
4229 }
4230 if (bt == T_VOID) {
4231 if (sig_vk->at(i-1)._bt == T_LONG ||
4232 sig_vk->at(i-1)._bt == T_DOUBLE) {
4233 j++;
4234 }
4235 continue;
4236 }
4237 int off = sig_vk->at(i)._offset;
4238 assert(off > 0, "offset in object should be positive");
4239 VMRegPair pair = regs->at(j);
4240 VMReg r_1 = pair.first();
4241 VMReg r_2 = pair.second();
4242 Address from(rax, off);
4243 if (bt == T_FLOAT) {
4244 __ movflt(r_1->as_XMMRegister(), from);
4245 } else if (bt == T_DOUBLE) {
4246 __ movdbl(r_1->as_XMMRegister(), from);
4247 } else if (bt == T_OBJECT || bt == T_ARRAY) {
4248 assert_different_registers(rax, r_1->as_Register());
4249 __ load_heap_oop(r_1->as_Register(), from);
4250 } else {
4251 assert(is_java_primitive(bt), "unexpected basic type");
4252 assert_different_registers(rax, r_1->as_Register());
4253 size_t size_in_bytes = type2aelembytes(bt);
4254 __ load_sized_value(r_1->as_Register(), from, size_in_bytes, bt != T_CHAR && bt != T_BOOLEAN);
4255 }
4256 j++;
4257 }
4258 assert(j == regs->length(), "missed a field?");
4259
4260 if (StressInlineTypeReturnedAsFields) {
4261 __ load_klass(rax, rax, rscratch1);
4262 __ orptr(rax, 1);
4263 }
4264
4265 __ ret(0);
4266
4267 __ flush();
4268
4269 return BufferedInlineTypeBlob::create(&buffer, pack_fields_off, pack_fields_jobject_off, unpack_fields_off);
4270 }
4271
4272 void SharedRuntime::compute_move_order(const BasicType* in_sig_bt,
4273 int total_in_args, const VMRegPair* in_regs,
4274 int total_out_args, VMRegPair* out_regs,
4275 GrowableArray<int>& arg_order,
4276 VMRegPair tmp_vmreg) {
4277 ComputeMoveOrder order(total_in_args, in_regs,
4278 total_out_args, out_regs,
4279 in_sig_bt, arg_order, tmp_vmreg);
4280 }
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