877 // so making them eagerly shouldn't be too expensive.
878 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh);
879 if (adapter == NULL ) {
880 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters");
881 }
882
883 mh->set_adapter_entry(adapter);
884 mh->_from_compiled_entry = adapter->get_c2i_entry();
885 return adapter->get_c2i_entry();
886 }
887
888 // The verified_code_entry() must be called when a invoke is resolved
889 // on this method.
890
891 // It returns the compiled code entry point, after asserting not null.
892 // This function is called after potential safepoints so that nmethod
893 // or adapter that it points to is still live and valid.
894 // This function must not hit a safepoint!
895 address Method::verified_code_entry() {
896 debug_only(No_Safepoint_Verifier nsv;)
897 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code);
898 if (code == NULL && UseCodeCacheFlushing) {
899 nmethod *saved_code = CodeCache::reanimate_saved_code(this);
900 if (saved_code != NULL) {
901 methodHandle method(this);
902 assert( ! saved_code->is_osr_method(), "should not get here for osr" );
903 set_code( method, saved_code );
904 }
905 }
906
907 assert(_from_compiled_entry != NULL, "must be set");
908 return _from_compiled_entry;
909 }
910
911 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all
912 // (could be racing a deopt).
913 // Not inline to avoid circular ref.
914 bool Method::check_code() const {
915 // cached in a register or local. There's a race on the value of the field.
916 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code);
917 return code == NULL || (code->method() == NULL) || (code->method() == (Method*)this && !code->is_osr_method());
918 }
919
920 // Install compiled code. Instantly it can execute.
921 void Method::set_code(methodHandle mh, nmethod *code) {
922 assert( code, "use clear_code to remove code" );
923 assert( mh->check_code(), "" );
924
925 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!");
926
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877 // so making them eagerly shouldn't be too expensive.
878 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh);
879 if (adapter == NULL ) {
880 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters");
881 }
882
883 mh->set_adapter_entry(adapter);
884 mh->_from_compiled_entry = adapter->get_c2i_entry();
885 return adapter->get_c2i_entry();
886 }
887
888 // The verified_code_entry() must be called when a invoke is resolved
889 // on this method.
890
891 // It returns the compiled code entry point, after asserting not null.
892 // This function is called after potential safepoints so that nmethod
893 // or adapter that it points to is still live and valid.
894 // This function must not hit a safepoint!
895 address Method::verified_code_entry() {
896 debug_only(No_Safepoint_Verifier nsv;)
897 assert(_from_compiled_entry != NULL, "must be set");
898 return _from_compiled_entry;
899 }
900
901 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all
902 // (could be racing a deopt).
903 // Not inline to avoid circular ref.
904 bool Method::check_code() const {
905 // cached in a register or local. There's a race on the value of the field.
906 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code);
907 return code == NULL || (code->method() == NULL) || (code->method() == (Method*)this && !code->is_osr_method());
908 }
909
910 // Install compiled code. Instantly it can execute.
911 void Method::set_code(methodHandle mh, nmethod *code) {
912 assert( code, "use clear_code to remove code" );
913 assert( mh->check_code(), "" );
914
915 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!");
916
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