465 else if( freg_arg1 == fltarg_flt_dbl ) freg_arg1 = i;
466 else // Else double is passed low on the stack to be aligned.
467 stack += 2;
468 } else if( sig_bt[i] == T_LONG ) {
469 stack += 2;
470 }
471 }
472 int dstack = 0; // Separate counter for placing doubles
473
474 // Now pick where all else goes.
475 for( i = 0; i < total_args_passed; i++) {
476 // From the type and the argument number (count) compute the location
477 switch( sig_bt[i] ) {
478 case T_SHORT:
479 case T_CHAR:
480 case T_BYTE:
481 case T_BOOLEAN:
482 case T_INT:
483 case T_ARRAY:
484 case T_OBJECT:
485 case T_ADDRESS:
486 if( reg_arg0 == 9999 ) {
487 reg_arg0 = i;
488 regs[i].set1(rcx->as_VMReg());
489 } else if( reg_arg1 == 9999 ) {
490 reg_arg1 = i;
491 regs[i].set1(rdx->as_VMReg());
492 } else {
493 regs[i].set1(VMRegImpl::stack2reg(stack++));
494 }
495 break;
496 case T_FLOAT:
497 if( freg_arg0 == fltarg_flt_dbl || freg_arg0 == fltarg_float_only ) {
498 freg_arg0 = i;
499 regs[i].set1(xmm0->as_VMReg());
500 } else if( freg_arg1 == fltarg_flt_dbl || freg_arg1 == fltarg_float_only ) {
501 freg_arg1 = i;
502 regs[i].set1(xmm1->as_VMReg());
503 } else {
504 regs[i].set1(VMRegImpl::stack2reg(stack++));
515 regs[i].set2(xmm0->as_VMReg());
516 } else if( freg_arg1 == (uint)i ) {
517 regs[i].set2(xmm1->as_VMReg());
518 } else {
519 regs[i].set2(VMRegImpl::stack2reg(dstack));
520 dstack += 2;
521 }
522 break;
523 case T_VOID: regs[i].set_bad(); break;
524 break;
525 default:
526 ShouldNotReachHere();
527 break;
528 }
529 }
530
531 // return value can be odd number of VMRegImpl stack slots make multiple of 2
532 return align_up(stack, 2);
533 }
534
535 // Patch the callers callsite with entry to compiled code if it exists.
536 static void patch_callers_callsite(MacroAssembler *masm) {
537 Label L;
538 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD);
539 __ jcc(Assembler::equal, L);
540 // Schedule the branch target address early.
541 // Call into the VM to patch the caller, then jump to compiled callee
542 // rax, isn't live so capture return address while we easily can
543 __ movptr(rax, Address(rsp, 0));
544 __ pusha();
545 __ pushf();
546
547 if (UseSSE == 1) {
548 __ subptr(rsp, 2*wordSize);
549 __ movflt(Address(rsp, 0), xmm0);
550 __ movflt(Address(rsp, wordSize), xmm1);
551 }
552 if (UseSSE >= 2) {
553 __ subptr(rsp, 4*wordSize);
554 __ movdbl(Address(rsp, 0), xmm0);
576 __ addptr(rsp, 2*wordSize);
577 }
578 if (UseSSE >= 2) {
579 __ movdbl(xmm0, Address(rsp, 0));
580 __ movdbl(xmm1, Address(rsp, 2*wordSize));
581 __ addptr(rsp, 4*wordSize);
582 }
583
584 __ popf();
585 __ popa();
586 __ bind(L);
587 }
588
589
590 static void move_c2i_double(MacroAssembler *masm, XMMRegister r, int st_off) {
591 int next_off = st_off - Interpreter::stackElementSize;
592 __ movdbl(Address(rsp, next_off), r);
593 }
594
595 static void gen_c2i_adapter(MacroAssembler *masm,
596 int total_args_passed,
597 int comp_args_on_stack,
598 const BasicType *sig_bt,
599 const VMRegPair *regs,
600 Label& skip_fixup) {
601 // Before we get into the guts of the C2I adapter, see if we should be here
602 // at all. We've come from compiled code and are attempting to jump to the
603 // interpreter, which means the caller made a static call to get here
604 // (vcalls always get a compiled target if there is one). Check for a
605 // compiled target. If there is one, we need to patch the caller's call.
606 patch_callers_callsite(masm);
607
608 __ bind(skip_fixup);
609
610 #ifdef COMPILER2
611 // C2 may leave the stack dirty if not in SSE2+ mode
612 if (UseSSE >= 2) {
613 __ verify_FPU(0, "c2i transition should have clean FPU stack");
614 } else {
615 __ empty_FPU_stack();
616 }
617 #endif /* COMPILER2 */
618
619 // Since all args are passed on the stack, total_args_passed * interpreter_
620 // stack_element_size is the
621 // space we need.
622 int extraspace = total_args_passed * Interpreter::stackElementSize;
623
624 // Get return address
625 __ pop(rax);
626
627 // set senderSP value
628 __ movptr(rsi, rsp);
629
630 __ subptr(rsp, extraspace);
631
632 // Now write the args into the outgoing interpreter space
633 for (int i = 0; i < total_args_passed; i++) {
634 if (sig_bt[i] == T_VOID) {
635 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half");
636 continue;
637 }
638
639 // st_off points to lowest address on stack.
640 int st_off = ((total_args_passed - 1) - i) * Interpreter::stackElementSize;
641 int next_off = st_off - Interpreter::stackElementSize;
642
643 // Say 4 args:
644 // i st_off
645 // 0 12 T_LONG
646 // 1 8 T_VOID
647 // 2 4 T_OBJECT
648 // 3 0 T_BOOL
649 VMReg r_1 = regs[i].first();
650 VMReg r_2 = regs[i].second();
651 if (!r_1->is_valid()) {
652 assert(!r_2->is_valid(), "");
653 continue;
654 }
655
656 if (r_1->is_stack()) {
657 // memory to memory use fpu stack top
658 int ld_off = r_1->reg2stack() * VMRegImpl::stack_slot_size + extraspace;
659
660 if (!r_2->is_valid()) {
670 #ifndef _LP64
671 __ movptr(rdi, Address(rsp, ld_off + wordSize));
672 __ movptr(Address(rsp, st_off), rdi);
673 #else
674 #ifdef ASSERT
675 // Overwrite the unused slot with known junk
676 __ mov64(rax, CONST64(0xdeadffffdeadaaaa));
677 __ movptr(Address(rsp, st_off), rax);
678 #endif /* ASSERT */
679 #endif // _LP64
680 }
681 } else if (r_1->is_Register()) {
682 Register r = r_1->as_Register();
683 if (!r_2->is_valid()) {
684 __ movl(Address(rsp, st_off), r);
685 } else {
686 // long/double in gpr
687 NOT_LP64(ShouldNotReachHere());
688 // Two VMRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG
689 // T_DOUBLE and T_LONG use two slots in the interpreter
690 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) {
691 // long/double in gpr
692 #ifdef ASSERT
693 // Overwrite the unused slot with known junk
694 LP64_ONLY(__ mov64(rax, CONST64(0xdeadffffdeadaaab)));
695 __ movptr(Address(rsp, st_off), rax);
696 #endif /* ASSERT */
697 __ movptr(Address(rsp, next_off), r);
698 } else {
699 __ movptr(Address(rsp, st_off), r);
700 }
701 }
702 } else {
703 assert(r_1->is_XMMRegister(), "");
704 if (!r_2->is_valid()) {
705 __ movflt(Address(rsp, st_off), r_1->as_XMMRegister());
706 } else {
707 assert(sig_bt[i] == T_DOUBLE || sig_bt[i] == T_LONG, "wrong type");
708 move_c2i_double(masm, r_1->as_XMMRegister(), st_off);
709 }
710 }
711 }
712
713 // Schedule the branch target address early.
714 __ movptr(rcx, Address(rbx, in_bytes(Method::interpreter_entry_offset())));
715 // And repush original return address
716 __ push(rax);
717 __ jmp(rcx);
718 }
719
720
721 static void move_i2c_double(MacroAssembler *masm, XMMRegister r, Register saved_sp, int ld_off) {
722 int next_val_off = ld_off - Interpreter::stackElementSize;
723 __ movdbl(r, Address(saved_sp, next_val_off));
724 }
725
726 static void range_check(MacroAssembler* masm, Register pc_reg, Register temp_reg,
727 address code_start, address code_end,
728 Label& L_ok) {
729 Label L_fail;
730 __ lea(temp_reg, ExternalAddress(code_start));
731 __ cmpptr(pc_reg, temp_reg);
732 __ jcc(Assembler::belowEqual, L_fail);
733 __ lea(temp_reg, ExternalAddress(code_end));
734 __ cmpptr(pc_reg, temp_reg);
735 __ jcc(Assembler::below, L_ok);
736 __ bind(L_fail);
737 }
738
739 void SharedRuntime::gen_i2c_adapter(MacroAssembler *masm,
740 int total_args_passed,
741 int comp_args_on_stack,
742 const BasicType *sig_bt,
743 const VMRegPair *regs) {
744 // Note: rsi contains the senderSP on entry. We must preserve it since
745 // we may do a i2c -> c2i transition if we lose a race where compiled
746 // code goes non-entrant while we get args ready.
747
748 // Adapters can be frameless because they do not require the caller
749 // to perform additional cleanup work, such as correcting the stack pointer.
750 // An i2c adapter is frameless because the *caller* frame, which is interpreted,
751 // routinely repairs its own stack pointer (from interpreter_frame_last_sp),
752 // even if a callee has modified the stack pointer.
753 // A c2i adapter is frameless because the *callee* frame, which is interpreted,
754 // routinely repairs its caller's stack pointer (from sender_sp, which is set
755 // up via the senderSP register).
756 // In other words, if *either* the caller or callee is interpreted, we can
757 // get the stack pointer repaired after a call.
758 // This is why c2i and i2c adapters cannot be indefinitely composed.
759 // In particular, if a c2i adapter were to somehow call an i2c adapter,
760 // both caller and callee would be compiled methods, and neither would
761 // clean up the stack pointer changes performed by the two adapters.
762 // If this happens, control eventually transfers back to the compiled
763 // caller, but with an uncorrected stack, causing delayed havoc.
812 }
813
814 // Align the outgoing SP
815 __ andptr(rsp, -(StackAlignmentInBytes));
816
817 // push the return address on the stack (note that pushing, rather
818 // than storing it, yields the correct frame alignment for the callee)
819 __ push(rax);
820
821 // Put saved SP in another register
822 const Register saved_sp = rax;
823 __ movptr(saved_sp, rdi);
824
825
826 // Will jump to the compiled code just as if compiled code was doing it.
827 // Pre-load the register-jump target early, to schedule it better.
828 __ movptr(rdi, Address(rbx, in_bytes(Method::from_compiled_offset())));
829
830 // Now generate the shuffle code. Pick up all register args and move the
831 // rest through the floating point stack top.
832 for (int i = 0; i < total_args_passed; i++) {
833 if (sig_bt[i] == T_VOID) {
834 // Longs and doubles are passed in native word order, but misaligned
835 // in the 32-bit build.
836 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half");
837 continue;
838 }
839
840 // Pick up 0, 1 or 2 words from SP+offset.
841
842 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(),
843 "scrambled load targets?");
844 // Load in argument order going down.
845 int ld_off = (total_args_passed - i) * Interpreter::stackElementSize;
846 // Point to interpreter value (vs. tag)
847 int next_off = ld_off - Interpreter::stackElementSize;
848 //
849 //
850 //
851 VMReg r_1 = regs[i].first();
852 VMReg r_2 = regs[i].second();
853 if (!r_1->is_valid()) {
854 assert(!r_2->is_valid(), "");
855 continue;
856 }
857 if (r_1->is_stack()) {
858 // Convert stack slot to an SP offset (+ wordSize to account for return address )
859 int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize;
860
861 // We can use rsi as a temp here because compiled code doesn't need rsi as an input
862 // and if we end up going thru a c2i because of a miss a reasonable value of rsi
863 // we be generated.
864 if (!r_2->is_valid()) {
865 // __ fld_s(Address(saved_sp, ld_off));
866 // __ fstp_s(Address(rsp, st_off));
867 __ movl(rsi, Address(saved_sp, ld_off));
868 __ movptr(Address(rsp, st_off), rsi);
869 } else {
870 // Interpreter local[n] == MSW, local[n+1] == LSW however locals
871 // are accessed as negative so LSW is at LOW address
872
873 // ld_off is MSW so get LSW
874 // st_off is LSW (i.e. reg.first())
875 // __ fld_d(Address(saved_sp, next_off));
876 // __ fstp_d(Address(rsp, st_off));
877 //
878 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE
879 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case
880 // So we must adjust where to pick up the data to match the interpreter.
881 //
882 // Interpreter local[n] == MSW, local[n+1] == LSW however locals
883 // are accessed as negative so LSW is at LOW address
884
885 // ld_off is MSW so get LSW
886 const int offset = (NOT_LP64(true ||) sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)?
887 next_off : ld_off;
888 __ movptr(rsi, Address(saved_sp, offset));
889 __ movptr(Address(rsp, st_off), rsi);
890 #ifndef _LP64
891 __ movptr(rsi, Address(saved_sp, ld_off));
892 __ movptr(Address(rsp, st_off + wordSize), rsi);
893 #endif // _LP64
894 }
895 } else if (r_1->is_Register()) { // Register argument
896 Register r = r_1->as_Register();
897 assert(r != rax, "must be different");
898 if (r_2->is_valid()) {
899 //
900 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE
901 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case
902 // So we must adjust where to pick up the data to match the interpreter.
903
904 const int offset = (NOT_LP64(true ||) sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)?
905 next_off : ld_off;
906
907 // this can be a misaligned move
908 __ movptr(r, Address(saved_sp, offset));
909 #ifndef _LP64
910 assert(r_2->as_Register() != rax, "need another temporary register");
911 // Remember r_1 is low address (and LSB on x86)
912 // So r_2 gets loaded from high address regardless of the platform
913 __ movptr(r_2->as_Register(), Address(saved_sp, ld_off));
914 #endif // _LP64
915 } else {
916 __ movl(r, Address(saved_sp, ld_off));
917 }
918 } else {
919 assert(r_1->is_XMMRegister(), "");
920 if (!r_2->is_valid()) {
921 __ movflt(r_1->as_XMMRegister(), Address(saved_sp, ld_off));
922 } else {
923 move_i2c_double(masm, r_1->as_XMMRegister(), saved_sp, ld_off);
924 }
932 // "compiled" so it is much better to make this transition
933 // invisible to the stack walking code. Unfortunately if
934 // we try and find the callee by normal means a safepoint
935 // is possible. So we stash the desired callee in the thread
936 // and the vm will find there should this case occur.
937
938 __ get_thread(rax);
939 __ movptr(Address(rax, JavaThread::callee_target_offset()), rbx);
940
941 // move Method* to rax, in case we end up in an c2i adapter.
942 // the c2i adapters expect Method* in rax, (c2) because c2's
943 // resolve stubs return the result (the method) in rax,.
944 // I'd love to fix this.
945 __ mov(rax, rbx);
946
947 __ jmp(rdi);
948 }
949
950 // ---------------------------------------------------------------
951 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm,
952 int total_args_passed,
953 int comp_args_on_stack,
954 const BasicType *sig_bt,
955 const VMRegPair *regs,
956 AdapterFingerPrint* fingerprint) {
957 address i2c_entry = __ pc();
958
959 gen_i2c_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs);
960
961 // -------------------------------------------------------------------------
962 // Generate a C2I adapter. On entry we know rbx, holds the Method* during calls
963 // to the interpreter. The args start out packed in the compiled layout. They
964 // need to be unpacked into the interpreter layout. This will almost always
965 // require some stack space. We grow the current (compiled) stack, then repack
966 // the args. We finally end in a jump to the generic interpreter entry point.
967 // On exit from the interpreter, the interpreter will restore our SP (lest the
968 // compiled code, which relys solely on SP and not EBP, get sick).
969
970 address c2i_unverified_entry = __ pc();
971 Label skip_fixup;
972
973 Register holder = rax;
974 Register receiver = rcx;
975 Register temp = rbx;
976
977 {
978
979 Label missed;
980 __ movptr(temp, Address(receiver, oopDesc::klass_offset_in_bytes()));
981 __ cmpptr(temp, Address(holder, CompiledICHolder::holder_klass_offset()));
982 __ movptr(rbx, Address(holder, CompiledICHolder::holder_metadata_offset()));
983 __ jcc(Assembler::notEqual, missed);
984 // Method might have been compiled since the call site was patched to
985 // interpreted if that is the case treat it as a miss so we can get
986 // the call site corrected.
987 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD);
988 __ jcc(Assembler::equal, skip_fixup);
989
990 __ bind(missed);
991 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
992 }
993
994 address c2i_entry = __ pc();
995
996 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
997 bs->c2i_entry_barrier(masm);
998
999 gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup);
1000
1001 __ flush();
1002 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry);
1003 }
1004
1005 int SharedRuntime::c_calling_convention(const BasicType *sig_bt,
1006 VMRegPair *regs,
1007 VMRegPair *regs2,
1008 int total_args_passed) {
1009 assert(regs2 == NULL, "not needed on x86");
1010 // We return the amount of VMRegImpl stack slots we need to reserve for all
1011 // the arguments NOT counting out_preserve_stack_slots.
1012
1013 uint stack = 0; // All arguments on stack
1014
1015 for( int i = 0; i < total_args_passed; i++) {
1016 // From the type and the argument number (count) compute the location
1017 switch( sig_bt[i] ) {
1018 case T_BOOLEAN:
1019 case T_CHAR:
1020 case T_FLOAT:
1021 case T_BYTE:
1022 case T_SHORT:
1023 case T_INT:
1024 case T_OBJECT:
1025 case T_ARRAY:
1026 case T_ADDRESS:
1027 case T_METADATA:
1028 regs[i].set1(VMRegImpl::stack2reg(stack++));
1029 break;
1030 case T_LONG:
1031 case T_DOUBLE: // The stack numbering is reversed from Java
1032 // Since C arguments do not get reversed, the ordering for
1033 // doubles on the stack must be opposite the Java convention
1034 assert((i + 1) < total_args_passed && sig_bt[i+1] == T_VOID, "missing Half" );
1035 regs[i].set2(VMRegImpl::stack2reg(stack));
1036 stack += 2;
1037 break;
1038 case T_VOID: regs[i].set_bad(); break;
1039 default:
1040 ShouldNotReachHere();
1041 break;
1042 }
1043 }
1044 return stack;
1703 // caller.
1704 //
1705 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/);
1706
1707 // Mark location of rbp,
1708 // map->set_callee_saved(VMRegImpl::stack2reg( stack_slots - 2), stack_slots * 2, 0, rbp->as_VMReg());
1709
1710 // We know that we only have args in at most two integer registers (rcx, rdx). So rax, rbx
1711 // Are free to temporaries if we have to do stack to steck moves.
1712 // All inbound args are referenced based on rbp, and all outbound args via rsp.
1713
1714 for (int i = 0; i < total_in_args ; i++, c_arg++ ) {
1715 switch (in_sig_bt[i]) {
1716 case T_ARRAY:
1717 if (is_critical_native) {
1718 VMRegPair in_arg = in_regs[i];
1719 unpack_array_argument(masm, in_arg, in_elem_bt[i], out_regs[c_arg + 1], out_regs[c_arg]);
1720 c_arg++;
1721 break;
1722 }
1723 case T_OBJECT:
1724 assert(!is_critical_native, "no oop arguments");
1725 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg],
1726 ((i == 0) && (!is_static)),
1727 &receiver_offset);
1728 break;
1729 case T_VOID:
1730 break;
1731
1732 case T_FLOAT:
1733 float_move(masm, in_regs[i], out_regs[c_arg]);
1734 break;
1735
1736 case T_DOUBLE:
1737 assert( i + 1 < total_in_args &&
1738 in_sig_bt[i + 1] == T_VOID &&
1739 out_sig_bt[c_arg+1] == T_VOID, "bad arg list");
1740 double_move(masm, in_regs[i], out_regs[c_arg]);
1741 break;
1742
1874 // Verify or restore cpu control state after JNI call
1875 __ restore_cpu_control_state_after_jni();
1876
1877 // WARNING - on Windows Java Natives use pascal calling convention and pop the
1878 // arguments off of the stack. We could just re-adjust the stack pointer here
1879 // and continue to do SP relative addressing but we instead switch to FP
1880 // relative addressing.
1881
1882 // Unpack native results.
1883 switch (ret_type) {
1884 case T_BOOLEAN: __ c2bool(rax); break;
1885 case T_CHAR : __ andptr(rax, 0xFFFF); break;
1886 case T_BYTE : __ sign_extend_byte (rax); break;
1887 case T_SHORT : __ sign_extend_short(rax); break;
1888 case T_INT : /* nothing to do */ break;
1889 case T_DOUBLE :
1890 case T_FLOAT :
1891 // Result is in st0 we'll save as needed
1892 break;
1893 case T_ARRAY: // Really a handle
1894 case T_OBJECT: // Really a handle
1895 break; // can't de-handlize until after safepoint check
1896 case T_VOID: break;
1897 case T_LONG: break;
1898 default : ShouldNotReachHere();
1899 }
1900
1901 Label after_transition;
1902
1903 // If this is a critical native, check for a safepoint or suspend request after the call.
1904 // If a safepoint is needed, transition to native, then to native_trans to handle
1905 // safepoints like the native methods that are not critical natives.
1906 if (is_critical_native) {
1907 Label needs_safepoint;
1908 __ safepoint_poll(needs_safepoint, thread, false /* at_return */, false /* in_nmethod */);
1909 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1910 __ jcc(Assembler::equal, after_transition);
1911 __ bind(needs_safepoint);
1912 }
1913
2968 __ bind(pending);
2969
2970 RegisterSaver::restore_live_registers(masm);
2971
2972 // exception pending => remove activation and forward to exception handler
2973
2974 __ get_thread(thread);
2975 __ movptr(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
2976 __ movptr(rax, Address(thread, Thread::pending_exception_offset()));
2977 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
2978
2979 // -------------
2980 // make sure all code is generated
2981 masm->flush();
2982
2983 // return the blob
2984 // frame_size_words or bytes??
2985 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_words, oop_maps, true);
2986 }
2987
2988 #ifdef COMPILER2
2989 RuntimeStub* SharedRuntime::make_native_invoker(address call_target,
2990 int shadow_space_bytes,
2991 const GrowableArray<VMReg>& input_registers,
2992 const GrowableArray<VMReg>& output_registers) {
2993 ShouldNotCallThis();
2994 return nullptr;
2995 }
2996 #endif
|
465 else if( freg_arg1 == fltarg_flt_dbl ) freg_arg1 = i;
466 else // Else double is passed low on the stack to be aligned.
467 stack += 2;
468 } else if( sig_bt[i] == T_LONG ) {
469 stack += 2;
470 }
471 }
472 int dstack = 0; // Separate counter for placing doubles
473
474 // Now pick where all else goes.
475 for( i = 0; i < total_args_passed; i++) {
476 // From the type and the argument number (count) compute the location
477 switch( sig_bt[i] ) {
478 case T_SHORT:
479 case T_CHAR:
480 case T_BYTE:
481 case T_BOOLEAN:
482 case T_INT:
483 case T_ARRAY:
484 case T_OBJECT:
485 case T_INLINE_TYPE:
486 case T_ADDRESS:
487 if( reg_arg0 == 9999 ) {
488 reg_arg0 = i;
489 regs[i].set1(rcx->as_VMReg());
490 } else if( reg_arg1 == 9999 ) {
491 reg_arg1 = i;
492 regs[i].set1(rdx->as_VMReg());
493 } else {
494 regs[i].set1(VMRegImpl::stack2reg(stack++));
495 }
496 break;
497 case T_FLOAT:
498 if( freg_arg0 == fltarg_flt_dbl || freg_arg0 == fltarg_float_only ) {
499 freg_arg0 = i;
500 regs[i].set1(xmm0->as_VMReg());
501 } else if( freg_arg1 == fltarg_flt_dbl || freg_arg1 == fltarg_float_only ) {
502 freg_arg1 = i;
503 regs[i].set1(xmm1->as_VMReg());
504 } else {
505 regs[i].set1(VMRegImpl::stack2reg(stack++));
516 regs[i].set2(xmm0->as_VMReg());
517 } else if( freg_arg1 == (uint)i ) {
518 regs[i].set2(xmm1->as_VMReg());
519 } else {
520 regs[i].set2(VMRegImpl::stack2reg(dstack));
521 dstack += 2;
522 }
523 break;
524 case T_VOID: regs[i].set_bad(); break;
525 break;
526 default:
527 ShouldNotReachHere();
528 break;
529 }
530 }
531
532 // return value can be odd number of VMRegImpl stack slots make multiple of 2
533 return align_up(stack, 2);
534 }
535
536 const uint SharedRuntime::java_return_convention_max_int = 1;
537 const uint SharedRuntime::java_return_convention_max_float = 1;
538 int SharedRuntime::java_return_convention(const BasicType *sig_bt,
539 VMRegPair *regs,
540 int total_args_passed) {
541 Unimplemented();
542 return 0;
543 }
544
545 // Patch the callers callsite with entry to compiled code if it exists.
546 static void patch_callers_callsite(MacroAssembler *masm) {
547 Label L;
548 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD);
549 __ jcc(Assembler::equal, L);
550 // Schedule the branch target address early.
551 // Call into the VM to patch the caller, then jump to compiled callee
552 // rax, isn't live so capture return address while we easily can
553 __ movptr(rax, Address(rsp, 0));
554 __ pusha();
555 __ pushf();
556
557 if (UseSSE == 1) {
558 __ subptr(rsp, 2*wordSize);
559 __ movflt(Address(rsp, 0), xmm0);
560 __ movflt(Address(rsp, wordSize), xmm1);
561 }
562 if (UseSSE >= 2) {
563 __ subptr(rsp, 4*wordSize);
564 __ movdbl(Address(rsp, 0), xmm0);
586 __ addptr(rsp, 2*wordSize);
587 }
588 if (UseSSE >= 2) {
589 __ movdbl(xmm0, Address(rsp, 0));
590 __ movdbl(xmm1, Address(rsp, 2*wordSize));
591 __ addptr(rsp, 4*wordSize);
592 }
593
594 __ popf();
595 __ popa();
596 __ bind(L);
597 }
598
599
600 static void move_c2i_double(MacroAssembler *masm, XMMRegister r, int st_off) {
601 int next_off = st_off - Interpreter::stackElementSize;
602 __ movdbl(Address(rsp, next_off), r);
603 }
604
605 static void gen_c2i_adapter(MacroAssembler *masm,
606 const GrowableArray<SigEntry>& sig_extended,
607 const VMRegPair *regs,
608 Label& skip_fixup,
609 address start,
610 OopMapSet*& oop_maps,
611 int& frame_complete,
612 int& frame_size_in_words) {
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 #ifdef COMPILER2
623 // C2 may leave the stack dirty if not in SSE2+ mode
624 if (UseSSE >= 2) {
625 __ verify_FPU(0, "c2i transition should have clean FPU stack");
626 } else {
627 __ empty_FPU_stack();
628 }
629 #endif /* COMPILER2 */
630
631 // Since all args are passed on the stack, total_args_passed * interpreter_
632 // stack_element_size is the
633 // space we need.
634 int extraspace = sig_extended.length() * Interpreter::stackElementSize;
635
636 // Get return address
637 __ pop(rax);
638
639 // set senderSP value
640 __ movptr(rsi, rsp);
641
642 __ subptr(rsp, extraspace);
643
644 // Now write the args into the outgoing interpreter space
645 for (int i = 0; i < sig_extended.length(); i++) {
646 if (sig_extended.at(i)._bt == T_VOID) {
647 assert(i > 0 && (sig_extended.at(i-1)._bt == T_LONG || sig_extended.at(i-1)._bt == T_DOUBLE), "missing half");
648 continue;
649 }
650
651 // st_off points to lowest address on stack.
652 int st_off = ((sig_extended.length() - 1) - i) * Interpreter::stackElementSize;
653 int next_off = st_off - Interpreter::stackElementSize;
654
655 // Say 4 args:
656 // i st_off
657 // 0 12 T_LONG
658 // 1 8 T_VOID
659 // 2 4 T_OBJECT
660 // 3 0 T_BOOL
661 VMReg r_1 = regs[i].first();
662 VMReg r_2 = regs[i].second();
663 if (!r_1->is_valid()) {
664 assert(!r_2->is_valid(), "");
665 continue;
666 }
667
668 if (r_1->is_stack()) {
669 // memory to memory use fpu stack top
670 int ld_off = r_1->reg2stack() * VMRegImpl::stack_slot_size + extraspace;
671
672 if (!r_2->is_valid()) {
682 #ifndef _LP64
683 __ movptr(rdi, Address(rsp, ld_off + wordSize));
684 __ movptr(Address(rsp, st_off), rdi);
685 #else
686 #ifdef ASSERT
687 // Overwrite the unused slot with known junk
688 __ mov64(rax, CONST64(0xdeadffffdeadaaaa));
689 __ movptr(Address(rsp, st_off), rax);
690 #endif /* ASSERT */
691 #endif // _LP64
692 }
693 } else if (r_1->is_Register()) {
694 Register r = r_1->as_Register();
695 if (!r_2->is_valid()) {
696 __ movl(Address(rsp, st_off), r);
697 } else {
698 // long/double in gpr
699 NOT_LP64(ShouldNotReachHere());
700 // Two VMRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG
701 // T_DOUBLE and T_LONG use two slots in the interpreter
702 if (sig_extended.at(i)._bt == T_LONG || sig_extended.at(i)._bt == T_DOUBLE) {
703 // long/double in gpr
704 #ifdef ASSERT
705 // Overwrite the unused slot with known junk
706 LP64_ONLY(__ mov64(rax, CONST64(0xdeadffffdeadaaab)));
707 __ movptr(Address(rsp, st_off), rax);
708 #endif /* ASSERT */
709 __ movptr(Address(rsp, next_off), r);
710 } else {
711 __ movptr(Address(rsp, st_off), r);
712 }
713 }
714 } else {
715 assert(r_1->is_XMMRegister(), "");
716 if (!r_2->is_valid()) {
717 __ movflt(Address(rsp, st_off), r_1->as_XMMRegister());
718 } else {
719 assert(sig_extended.at(i)._bt == T_DOUBLE || sig_extended.at(i)._bt == T_LONG, "wrong type");
720 move_c2i_double(masm, r_1->as_XMMRegister(), st_off);
721 }
722 }
723 }
724
725 // Schedule the branch target address early.
726 __ movptr(rcx, Address(rbx, in_bytes(Method::interpreter_entry_offset())));
727 // And repush original return address
728 __ push(rax);
729 __ jmp(rcx);
730 }
731
732
733 static void move_i2c_double(MacroAssembler *masm, XMMRegister r, Register saved_sp, int ld_off) {
734 int next_val_off = ld_off - Interpreter::stackElementSize;
735 __ movdbl(r, Address(saved_sp, next_val_off));
736 }
737
738 static void range_check(MacroAssembler* masm, Register pc_reg, Register temp_reg,
739 address code_start, address code_end,
740 Label& L_ok) {
741 Label L_fail;
742 __ lea(temp_reg, ExternalAddress(code_start));
743 __ cmpptr(pc_reg, temp_reg);
744 __ jcc(Assembler::belowEqual, L_fail);
745 __ lea(temp_reg, ExternalAddress(code_end));
746 __ cmpptr(pc_reg, temp_reg);
747 __ jcc(Assembler::below, L_ok);
748 __ bind(L_fail);
749 }
750
751 void SharedRuntime::gen_i2c_adapter(MacroAssembler *masm,
752 int comp_args_on_stack,
753 const GrowableArray<SigEntry>& sig_extended,
754 const VMRegPair *regs) {
755
756 // Note: rsi contains the senderSP on entry. We must preserve it since
757 // we may do a i2c -> c2i transition if we lose a race where compiled
758 // code goes non-entrant while we get args ready.
759
760 // Adapters can be frameless because they do not require the caller
761 // to perform additional cleanup work, such as correcting the stack pointer.
762 // An i2c adapter is frameless because the *caller* frame, which is interpreted,
763 // routinely repairs its own stack pointer (from interpreter_frame_last_sp),
764 // even if a callee has modified the stack pointer.
765 // A c2i adapter is frameless because the *callee* frame, which is interpreted,
766 // routinely repairs its caller's stack pointer (from sender_sp, which is set
767 // up via the senderSP register).
768 // In other words, if *either* the caller or callee is interpreted, we can
769 // get the stack pointer repaired after a call.
770 // This is why c2i and i2c adapters cannot be indefinitely composed.
771 // In particular, if a c2i adapter were to somehow call an i2c adapter,
772 // both caller and callee would be compiled methods, and neither would
773 // clean up the stack pointer changes performed by the two adapters.
774 // If this happens, control eventually transfers back to the compiled
775 // caller, but with an uncorrected stack, causing delayed havoc.
824 }
825
826 // Align the outgoing SP
827 __ andptr(rsp, -(StackAlignmentInBytes));
828
829 // push the return address on the stack (note that pushing, rather
830 // than storing it, yields the correct frame alignment for the callee)
831 __ push(rax);
832
833 // Put saved SP in another register
834 const Register saved_sp = rax;
835 __ movptr(saved_sp, rdi);
836
837
838 // Will jump to the compiled code just as if compiled code was doing it.
839 // Pre-load the register-jump target early, to schedule it better.
840 __ movptr(rdi, Address(rbx, in_bytes(Method::from_compiled_offset())));
841
842 // Now generate the shuffle code. Pick up all register args and move the
843 // rest through the floating point stack top.
844 for (int i = 0; i < sig_extended.length(); i++) {
845 if (sig_extended.at(i)._bt == T_VOID) {
846 // Longs and doubles are passed in native word order, but misaligned
847 // in the 32-bit build.
848 assert(i > 0 && (sig_extended.at(i-1)._bt == T_LONG || sig_extended.at(i-1)._bt == T_DOUBLE), "missing half");
849 continue;
850 }
851
852 // Pick up 0, 1 or 2 words from SP+offset.
853
854 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(),
855 "scrambled load targets?");
856 // Load in argument order going down.
857 int ld_off = (sig_extended.length() - i) * Interpreter::stackElementSize;
858 // Point to interpreter value (vs. tag)
859 int next_off = ld_off - Interpreter::stackElementSize;
860 //
861 //
862 //
863 VMReg r_1 = regs[i].first();
864 VMReg r_2 = regs[i].second();
865 if (!r_1->is_valid()) {
866 assert(!r_2->is_valid(), "");
867 continue;
868 }
869 if (r_1->is_stack()) {
870 // Convert stack slot to an SP offset (+ wordSize to account for return address )
871 int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize;
872
873 // We can use rsi as a temp here because compiled code doesn't need rsi as an input
874 // and if we end up going thru a c2i because of a miss a reasonable value of rsi
875 // we be generated.
876 if (!r_2->is_valid()) {
877 // __ fld_s(Address(saved_sp, ld_off));
878 // __ fstp_s(Address(rsp, st_off));
879 __ movl(rsi, Address(saved_sp, ld_off));
880 __ movptr(Address(rsp, st_off), rsi);
881 } else {
882 // Interpreter local[n] == MSW, local[n+1] == LSW however locals
883 // are accessed as negative so LSW is at LOW address
884
885 // ld_off is MSW so get LSW
886 // st_off is LSW (i.e. reg.first())
887 // __ fld_d(Address(saved_sp, next_off));
888 // __ fstp_d(Address(rsp, st_off));
889 //
890 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE
891 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case
892 // So we must adjust where to pick up the data to match the interpreter.
893 //
894 // Interpreter local[n] == MSW, local[n+1] == LSW however locals
895 // are accessed as negative so LSW is at LOW address
896
897 // ld_off is MSW so get LSW
898 const int offset = (NOT_LP64(true ||) sig_extended.at(i)._bt==T_LONG||sig_extended.at(i)._bt==T_DOUBLE)?
899 next_off : ld_off;
900 __ movptr(rsi, Address(saved_sp, offset));
901 __ movptr(Address(rsp, st_off), rsi);
902 #ifndef _LP64
903 __ movptr(rsi, Address(saved_sp, ld_off));
904 __ movptr(Address(rsp, st_off + wordSize), rsi);
905 #endif // _LP64
906 }
907 } else if (r_1->is_Register()) { // Register argument
908 Register r = r_1->as_Register();
909 assert(r != rax, "must be different");
910 if (r_2->is_valid()) {
911 //
912 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE
913 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case
914 // So we must adjust where to pick up the data to match the interpreter.
915
916 const int offset = (NOT_LP64(true ||) sig_extended.at(i)._bt==T_LONG||sig_extended.at(i)._bt==T_DOUBLE)?
917 next_off : ld_off;
918
919 // this can be a misaligned move
920 __ movptr(r, Address(saved_sp, offset));
921 #ifndef _LP64
922 assert(r_2->as_Register() != rax, "need another temporary register");
923 // Remember r_1 is low address (and LSB on x86)
924 // So r_2 gets loaded from high address regardless of the platform
925 __ movptr(r_2->as_Register(), Address(saved_sp, ld_off));
926 #endif // _LP64
927 } else {
928 __ movl(r, Address(saved_sp, ld_off));
929 }
930 } else {
931 assert(r_1->is_XMMRegister(), "");
932 if (!r_2->is_valid()) {
933 __ movflt(r_1->as_XMMRegister(), Address(saved_sp, ld_off));
934 } else {
935 move_i2c_double(masm, r_1->as_XMMRegister(), saved_sp, ld_off);
936 }
944 // "compiled" so it is much better to make this transition
945 // invisible to the stack walking code. Unfortunately if
946 // we try and find the callee by normal means a safepoint
947 // is possible. So we stash the desired callee in the thread
948 // and the vm will find there should this case occur.
949
950 __ get_thread(rax);
951 __ movptr(Address(rax, JavaThread::callee_target_offset()), rbx);
952
953 // move Method* to rax, in case we end up in an c2i adapter.
954 // the c2i adapters expect Method* in rax, (c2) because c2's
955 // resolve stubs return the result (the method) in rax,.
956 // I'd love to fix this.
957 __ mov(rax, rbx);
958
959 __ jmp(rdi);
960 }
961
962 // ---------------------------------------------------------------
963 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm,
964 int comp_args_on_stack,
965 const GrowableArray<SigEntry>& sig_extended,
966 const VMRegPair *regs,
967 AdapterFingerPrint* fingerprint,
968 AdapterBlob*& new_adapter) {
969 address i2c_entry = __ pc();
970
971 gen_i2c_adapter(masm, comp_args_on_stack, sig_extended, regs);
972
973 // -------------------------------------------------------------------------
974 // Generate a C2I adapter. On entry we know rbx, holds the Method* during calls
975 // to the interpreter. The args start out packed in the compiled layout. They
976 // need to be unpacked into the interpreter layout. This will almost always
977 // require some stack space. We grow the current (compiled) stack, then repack
978 // the args. We finally end in a jump to the generic interpreter entry point.
979 // On exit from the interpreter, the interpreter will restore our SP (lest the
980 // compiled code, which relys solely on SP and not EBP, get sick).
981
982 address c2i_unverified_entry = __ pc();
983 Label skip_fixup;
984
985 Register holder = rax;
986 Register receiver = rcx;
987 Register temp = rbx;
988
989 {
990
991 Label missed;
992 __ movptr(temp, Address(receiver, oopDesc::klass_offset_in_bytes()));
993 __ cmpptr(temp, Address(holder, CompiledICHolder::holder_klass_offset()));
994 __ movptr(rbx, Address(holder, CompiledICHolder::holder_metadata_offset()));
995 __ jcc(Assembler::notEqual, missed);
996 // Method might have been compiled since the call site was patched to
997 // interpreted if that is the case treat it as a miss so we can get
998 // the call site corrected.
999 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD);
1000 __ jcc(Assembler::equal, skip_fixup);
1001
1002 __ bind(missed);
1003 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
1004 }
1005
1006 address c2i_entry = __ pc();
1007
1008 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
1009 bs->c2i_entry_barrier(masm);
1010
1011 OopMapSet* oop_maps = NULL;
1012 int frame_complete = CodeOffsets::frame_never_safe;
1013 int frame_size_in_words = 0;
1014 gen_c2i_adapter(masm, sig_extended, regs, skip_fixup, i2c_entry, oop_maps, frame_complete, frame_size_in_words);
1015
1016 __ flush();
1017 new_adapter = AdapterBlob::create(masm->code(), frame_complete, frame_size_in_words, oop_maps);
1018 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry);
1019 }
1020
1021 int SharedRuntime::c_calling_convention(const BasicType *sig_bt,
1022 VMRegPair *regs,
1023 VMRegPair *regs2,
1024 int total_args_passed) {
1025 assert(regs2 == NULL, "not needed on x86");
1026 // We return the amount of VMRegImpl stack slots we need to reserve for all
1027 // the arguments NOT counting out_preserve_stack_slots.
1028
1029 uint stack = 0; // All arguments on stack
1030
1031 for( int i = 0; i < total_args_passed; i++) {
1032 // From the type and the argument number (count) compute the location
1033 switch( sig_bt[i] ) {
1034 case T_BOOLEAN:
1035 case T_CHAR:
1036 case T_FLOAT:
1037 case T_BYTE:
1038 case T_SHORT:
1039 case T_INT:
1040 case T_OBJECT:
1041 case T_INLINE_TYPE:
1042 case T_ARRAY:
1043 case T_ADDRESS:
1044 case T_METADATA:
1045 regs[i].set1(VMRegImpl::stack2reg(stack++));
1046 break;
1047 case T_LONG:
1048 case T_DOUBLE: // The stack numbering is reversed from Java
1049 // Since C arguments do not get reversed, the ordering for
1050 // doubles on the stack must be opposite the Java convention
1051 assert((i + 1) < total_args_passed && sig_bt[i+1] == T_VOID, "missing Half" );
1052 regs[i].set2(VMRegImpl::stack2reg(stack));
1053 stack += 2;
1054 break;
1055 case T_VOID: regs[i].set_bad(); break;
1056 default:
1057 ShouldNotReachHere();
1058 break;
1059 }
1060 }
1061 return stack;
1720 // caller.
1721 //
1722 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/);
1723
1724 // Mark location of rbp,
1725 // map->set_callee_saved(VMRegImpl::stack2reg( stack_slots - 2), stack_slots * 2, 0, rbp->as_VMReg());
1726
1727 // We know that we only have args in at most two integer registers (rcx, rdx). So rax, rbx
1728 // Are free to temporaries if we have to do stack to steck moves.
1729 // All inbound args are referenced based on rbp, and all outbound args via rsp.
1730
1731 for (int i = 0; i < total_in_args ; i++, c_arg++ ) {
1732 switch (in_sig_bt[i]) {
1733 case T_ARRAY:
1734 if (is_critical_native) {
1735 VMRegPair in_arg = in_regs[i];
1736 unpack_array_argument(masm, in_arg, in_elem_bt[i], out_regs[c_arg + 1], out_regs[c_arg]);
1737 c_arg++;
1738 break;
1739 }
1740 case T_INLINE_TYPE:
1741 case T_OBJECT:
1742 assert(!is_critical_native, "no oop arguments");
1743 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg],
1744 ((i == 0) && (!is_static)),
1745 &receiver_offset);
1746 break;
1747 case T_VOID:
1748 break;
1749
1750 case T_FLOAT:
1751 float_move(masm, in_regs[i], out_regs[c_arg]);
1752 break;
1753
1754 case T_DOUBLE:
1755 assert( i + 1 < total_in_args &&
1756 in_sig_bt[i + 1] == T_VOID &&
1757 out_sig_bt[c_arg+1] == T_VOID, "bad arg list");
1758 double_move(masm, in_regs[i], out_regs[c_arg]);
1759 break;
1760
1892 // Verify or restore cpu control state after JNI call
1893 __ restore_cpu_control_state_after_jni();
1894
1895 // WARNING - on Windows Java Natives use pascal calling convention and pop the
1896 // arguments off of the stack. We could just re-adjust the stack pointer here
1897 // and continue to do SP relative addressing but we instead switch to FP
1898 // relative addressing.
1899
1900 // Unpack native results.
1901 switch (ret_type) {
1902 case T_BOOLEAN: __ c2bool(rax); break;
1903 case T_CHAR : __ andptr(rax, 0xFFFF); break;
1904 case T_BYTE : __ sign_extend_byte (rax); break;
1905 case T_SHORT : __ sign_extend_short(rax); break;
1906 case T_INT : /* nothing to do */ break;
1907 case T_DOUBLE :
1908 case T_FLOAT :
1909 // Result is in st0 we'll save as needed
1910 break;
1911 case T_ARRAY: // Really a handle
1912 case T_INLINE_TYPE: // Really a handle
1913 case T_OBJECT: // Really a handle
1914 break; // can't de-handlize until after safepoint check
1915 case T_VOID: break;
1916 case T_LONG: break;
1917 default : ShouldNotReachHere();
1918 }
1919
1920 Label after_transition;
1921
1922 // If this is a critical native, check for a safepoint or suspend request after the call.
1923 // If a safepoint is needed, transition to native, then to native_trans to handle
1924 // safepoints like the native methods that are not critical natives.
1925 if (is_critical_native) {
1926 Label needs_safepoint;
1927 __ safepoint_poll(needs_safepoint, thread, false /* at_return */, false /* in_nmethod */);
1928 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1929 __ jcc(Assembler::equal, after_transition);
1930 __ bind(needs_safepoint);
1931 }
1932
2987 __ bind(pending);
2988
2989 RegisterSaver::restore_live_registers(masm);
2990
2991 // exception pending => remove activation and forward to exception handler
2992
2993 __ get_thread(thread);
2994 __ movptr(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
2995 __ movptr(rax, Address(thread, Thread::pending_exception_offset()));
2996 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
2997
2998 // -------------
2999 // make sure all code is generated
3000 masm->flush();
3001
3002 // return the blob
3003 // frame_size_words or bytes??
3004 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_words, oop_maps, true);
3005 }
3006
3007 BufferedInlineTypeBlob* SharedRuntime::generate_buffered_inline_type_adapter(const InlineKlass* vk) {
3008 Unimplemented();
3009 return NULL;
3010 }
3011
3012 #ifdef COMPILER2
3013 RuntimeStub* SharedRuntime::make_native_invoker(address call_target,
3014 int shadow_space_bytes,
3015 const GrowableArray<VMReg>& input_registers,
3016 const GrowableArray<VMReg>& output_registers) {
3017 ShouldNotCallThis();
3018 return nullptr;
3019 }
3020 #endif
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