565 }
566
567 bool Method::can_be_statically_bound(AccessFlags class_access_flags) const {
568 if (is_final_method(class_access_flags)) return true;
569 #ifdef ASSERT
570 ResourceMark rm;
571 bool is_nonv = (vtable_index() == nonvirtual_vtable_index);
572 if (class_access_flags.is_interface()) {
573 assert(is_nonv == is_static(), "is_nonv=%s", name_and_sig_as_C_string());
574 }
575 #endif
576 assert(valid_vtable_index() || valid_itable_index(), "method must be linked before we ask this question");
577 return vtable_index() == nonvirtual_vtable_index;
578 }
579
580 bool Method::can_be_statically_bound() const {
581 return can_be_statically_bound(method_holder()->access_flags());
582 }
583
584 bool Method::is_accessor() const {
585 if (code_size() != 5) return false;
586 if (size_of_parameters() != 1) return false;
587 if (java_code_at(0) != Bytecodes::_aload_0 ) return false;
588 if (java_code_at(1) != Bytecodes::_getfield) return false;
589 if (java_code_at(4) != Bytecodes::_areturn &&
590 java_code_at(4) != Bytecodes::_ireturn ) return false;
591 return true;
592 }
593
594 bool Method::is_constant_getter() const {
595 int last_index = code_size() - 1;
596 // Check if the first 1-3 bytecodes are a constant push
597 // and the last bytecode is a return.
598 return (2 <= code_size() && code_size() <= 4 &&
599 Bytecodes::is_const(java_code_at(0)) &&
600 Bytecodes::length_for(java_code_at(0)) == last_index &&
601 Bytecodes::is_return(java_code_at(last_index)));
602 }
603
604 bool Method::is_initializer() const {
605 return name() == vmSymbols::object_initializer_name() || is_static_initializer();
606 }
607
608 bool Method::has_valid_initializer_flags() const {
609 return (is_static() ||
610 method_holder()->major_version() < 51);
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565 }
566
567 bool Method::can_be_statically_bound(AccessFlags class_access_flags) const {
568 if (is_final_method(class_access_flags)) return true;
569 #ifdef ASSERT
570 ResourceMark rm;
571 bool is_nonv = (vtable_index() == nonvirtual_vtable_index);
572 if (class_access_flags.is_interface()) {
573 assert(is_nonv == is_static(), "is_nonv=%s", name_and_sig_as_C_string());
574 }
575 #endif
576 assert(valid_vtable_index() || valid_itable_index(), "method must be linked before we ask this question");
577 return vtable_index() == nonvirtual_vtable_index;
578 }
579
580 bool Method::can_be_statically_bound() const {
581 return can_be_statically_bound(method_holder()->access_flags());
582 }
583
584 bool Method::is_accessor() const {
585 return is_getter() || is_setter();
586 }
587
588 bool Method::is_getter() const {
589 if (code_size() != 5) return false;
590 if (size_of_parameters() != 1) return false;
591 if (java_code_at(0) != Bytecodes::_aload_0) return false;
592 if (java_code_at(1) != Bytecodes::_getfield) return false;
593 switch (java_code_at(4)) {
594 case Bytecodes::_ireturn:
595 case Bytecodes::_lreturn:
596 case Bytecodes::_freturn:
597 case Bytecodes::_dreturn:
598 case Bytecodes::_areturn:
599 break;
600 default:
601 return false;
602 }
603 return true;
604 }
605
606 bool Method::is_setter() const {
607 if (code_size() != 6) return false;
608 if (java_code_at(0) != Bytecodes::_aload_0) return false;
609 switch (java_code_at(1)) {
610 case Bytecodes::_iload_1:
611 case Bytecodes::_aload_1:
612 case Bytecodes::_fload_1:
613 if (size_of_parameters() != 2) return false;
614 break;
615 case Bytecodes::_dload_1:
616 case Bytecodes::_lload_1:
617 if (size_of_parameters() != 3) return false;
618 break;
619 default:
620 return false;
621 }
622 if (java_code_at(2) != Bytecodes::_putfield) return false;
623 if (java_code_at(5) != Bytecodes::_return) return false;
624 return true;
625 }
626
627 bool Method::is_constant_getter() const {
628 int last_index = code_size() - 1;
629 // Check if the first 1-3 bytecodes are a constant push
630 // and the last bytecode is a return.
631 return (2 <= code_size() && code_size() <= 4 &&
632 Bytecodes::is_const(java_code_at(0)) &&
633 Bytecodes::length_for(java_code_at(0)) == last_index &&
634 Bytecodes::is_return(java_code_at(last_index)));
635 }
636
637 bool Method::is_initializer() const {
638 return name() == vmSymbols::object_initializer_name() || is_static_initializer();
639 }
640
641 bool Method::has_valid_initializer_flags() const {
642 return (is_static() ||
643 method_holder()->major_version() < 51);
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