元宝DeepSeek jdk-jdk-27-6/src/hotspot/cpu/arm/gc/shared/cardTableBarrierSetAssembler_arm.hpp 源码分析

JDK 27 cardTableBarrierSetAssembler_arm.hpp 源码分析文件定位与背景jdk-jdk-27-6/src/hotspot/cpu/arm/gc/shared/cardTableBarrierSetAssembler_arm.hpp路径解析：• cpu/arm：ARM 架构特定实现• gc/shared：共享的垃圾收集器代码• cardTableBarrierSetAssembler：卡表屏障的汇编器实现• _arm.hpp：ARM 平台特化头文件作用：为 ARM 架构实现卡表（Card Table）写屏障的汇编代码生成接口。核心结构分析类继承关系class CardTableBarrierSetAssembler : public ModRefBarrierSetAssembler {protected:// 卡表基址寄存器Register _cardtable_base;public:CardTableBarrierSetAssembler();virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type, Address dst, Register val, Register tmp); virtual void load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type, Address src,