rtda

package
v0.0.0-...-0de04ed Latest Latest
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 Go to latest Published: Apr 6, 2024 License: Apache-2.0 Imports: 2 Imported by: 0

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Frame 

type Frame struct {
	// contains filtered or unexported fields
}

Frame stack frame

func (*Frame) LocalVars 

func (self *Frame) LocalVars() LocalVars

getters & setters

func (*Frame) Method 

func (self *Frame) Method() *heap.Method

func (*Frame) NextPC 

func (self *Frame) NextPC() int

func (*Frame) OperandStack 

func (self *Frame) OperandStack() *OperandStack

func (*Frame) RevertNextPC 

func (self *Frame) RevertNextPC()

func (*Frame) SetNextPC 

func (self *Frame) SetNextPC(nextPC int)

func (*Frame) Thread 

func (self *Frame) Thread() *Thread

type LocalVars 

type LocalVars []Slot

LocalVars * 局部变量表（Local Variables Table）是一组变量值的存储空间，用于存放方法参数和方法内部定义的局部变量。 在Java程序被编译为Class文件时，就在方法的Code属性的max_locals数据项中确定了该方法所需分配的局部变量表的最大容量。 由于局部变量表是建立在线程堆栈中的，属于线程私有的数据，无论读写两个连续的变量槽是否为原子操作，都不会引起数据竞争和线程安全问题。

func (LocalVars) GetDouble 

func (self LocalVars) GetDouble(index uint) float64

func (LocalVars) GetFloat 

func (self LocalVars) GetFloat(index uint) float32

func (LocalVars) GetInt 

func (self LocalVars) GetInt(index uint) int32

func (LocalVars) GetLong 

func (self LocalVars) GetLong(index uint) int64

func (LocalVars) GetRef 

func (self LocalVars) GetRef(index uint) *heap.Object

func (LocalVars) GetThis 

func (self LocalVars) GetThis() *heap.Object

func (LocalVars) SetDouble 

func (self LocalVars) SetDouble(index uint, val float64)

func (LocalVars) SetFloat 

func (self LocalVars) SetFloat(index uint, val float32)

func (LocalVars) SetInt 

func (self LocalVars) SetInt(index uint, val int32)

func (LocalVars) SetLong 

func (self LocalVars) SetLong(index uint, val int64)

func (LocalVars) SetRef 

func (self LocalVars) SetRef(index uint, ref *heap.Object)

func (LocalVars) SetSlot 

func (self LocalVars) SetSlot(index uint, slot Slot)

type OperandStack 

type OperandStack struct {
	// contains filtered or unexported fields
}

OperandStack 对操作数栈的定义 * 由于编译器在编译Java程序时已经将操作数栈的最大容量记录在class文件的Code属性中。 所以直接利用Slot数组进行操作数栈的模拟。 

size	栈顶指针（指向栈顶元素的下一个位置）
slots	Slot数组，存放具体的操作数

func (*OperandStack) GetRefFromTop 

func (self *OperandStack) GetRefFromTop(n uint) *heap.Object

func (*OperandStack) PopBoolean 

func (self *OperandStack) PopBoolean() bool

func (*OperandStack) PopDouble 

func (self *OperandStack) PopDouble() float64

func (*OperandStack) PopFloat 

func (self *OperandStack) PopFloat() float32

func (*OperandStack) PopInt 

func (self *OperandStack) PopInt() int32

func (*OperandStack) PopLong 

func (self *OperandStack) PopLong() int64

func (*OperandStack) PopRef 

func (self *OperandStack) PopRef() *heap.Object

func (*OperandStack) PopSlot 

func (self *OperandStack) PopSlot() Slot

func (*OperandStack) PushBoolean 

func (self *OperandStack) PushBoolean(val bool)

func (*OperandStack) PushDouble 

func (self *OperandStack) PushDouble(val float64)

func (*OperandStack) PushFloat 

func (self *OperandStack) PushFloat(val float32)

func (*OperandStack) PushInt 

func (self *OperandStack) PushInt(val int32)

func (*OperandStack) PushLong 

func (self *OperandStack) PushLong(val int64)

func (*OperandStack) PushRef 

func (self *OperandStack) PushRef(ref *heap.Object)

func (*OperandStack) PushSlot 

func (self *OperandStack) PushSlot(slot Slot)

type Slot 

type Slot struct {
	// contains filtered or unexported fields
}

Slot 对数据结构槽的定义 * 

	num 	存放基本数据类型
    ref		存放引用数据类型

type Stack 

type Stack struct {
	// contains filtered or unexported fields
}

Stack 对Java虚拟机栈的定义 * 

Java虚拟机栈应该包括三个元素：

maxSize 栈的最大容量 size 栈当前的容量 _top 栈帧

type Thread 

type Thread struct {
	// contains filtered or unexported fields
}

Thread 对线程级的封装 Java虚拟机运行时数据区域可以分为线程私有与多线程共享 线程私有包括：程序计数器，Java虚拟机栈 * 该结构体包括两个变量： pc : 程序计数器 stack : 虚拟机栈

func NewThread 

func NewThread() *Thread

NewThread 创建线程中栈帧 的个数为1024 可以通过设置命令行参数来设置虚拟机栈的数量

func (*Thread) CurrentFrame 

func (self *Thread) CurrentFrame() *Frame

func (*Thread) IsStackEmpty 

func (self *Thread) IsStackEmpty() bool

func (*Thread) NewFrame 

func (self *Thread) NewFrame(method *heap.Method) *Frame

func (*Thread) PC 

func (self *Thread) PC() int

func (*Thread) PopFrame 

func (self *Thread) PopFrame() *Frame

func (*Thread) PushFrame 

func (self *Thread) PushFrame(frame *Frame)

func (*Thread) SetPC 

func (self *Thread) SetPC(pc int)

func (*Thread) TopFrame 

func (self *Thread) TopFrame() *Frame

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