VirtualMachine (Java Object Layout: Core 0.14 API)

```
public interface VirtualMachine
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`long`	`addressOf(Object obj)` Returns the machine address of the given object.
`int`	`arrayBaseOffset(String arrayComponentKlass)` Returns the array base offset for an array of a given component type.
`int`	`arrayHeaderSize()` Returns the array header size.
`int`	`arrayIndexScale(String arrayComponentKlass)` Returns the array index scale for an array of a given component type.
`String`	`details()` Returns the informational details about the current VM mode
`long`	`fieldOffset(Field field)` Returns the field offset for a given field, starting from the object base.
`boolean`	`getBoolean(Object obj, long offset)` Reads a boolean off the object at given offset.
`byte`	`getByte(Object obj, long offset)` Reads a byte off the object at given offset.
`char`	`getChar(Object obj, long offset)` Reads a char off the object at given offset.
`double`	`getDouble(Object obj, long offset)` Reads a double off the object at given offset.
`float`	`getFloat(Object obj, long offset)` Reads a float off the object at given offset.
`int`	`getInt(Object obj, long offset)` Reads an int off the object at given offset.
`long`	`getLong(Object obj, long offset)` Reads a long off the object at given offset.
`Object`	`getObject(Object obj, long offset)` Reads an object off the object at given offset.
`short`	`getShort(Object obj, long offset)` Reads a short off the object at given offset.
`int`	`objectAlignment()` Returns the object alignment.
`int`	`objectHeaderSize()` Returns the object header size.
`long`	`sizeOf(Object obj)` Returns the shallow size of the given object.
`long`	`sizeOfField(String klass)` Returns the size of a field holding the type.

- Method Detail
  - sizeOf
```
long sizeOf(Object obj)
```
    Returns the shallow size of the given object.
    
    Parameters:
    
    obj - object
    
    Returns:
    
    shallow size
  - sizeOfField
```
long sizeOfField(String klass)
```
    Returns the size of a field holding the type.
    
    Parameters:
    
    klass - klass
    
    Returns:
    
    slot size
  - addressOf
```
long addressOf(Object obj)
```
    Returns the machine address of the given object. Note that in some VM modes, the addresses would be guesses, based on internal experiments which would try to figure out the reference encoding. Use this data with care. Doing the naked memory access on the result of this method may corrupt the memory.
    
    Parameters:
    
    obj - object
    
    Returns:
    
    address
  - fieldOffset
```
long fieldOffset(Field field)
```
    Returns the field offset for a given field, starting from the object base.
    
    Parameters:
    
    field - field
    
    Returns:
    
    offset
  - arrayBaseOffset
```
int arrayBaseOffset(String arrayComponentKlass)
```
    Returns the array base offset for an array of a given component type.
    
    Parameters:
    
    arrayComponentKlass - component type
    
    Returns:
    
    base offset
  - arrayIndexScale
```
int arrayIndexScale(String arrayComponentKlass)
```
    Returns the array index scale for an array of a given component type.
    
    Parameters:
    
    arrayComponentKlass - component type
    
    Returns:
    
    index scale
  - objectAlignment
```
int objectAlignment()
```
    Returns the object alignment.
    
    Returns:
    
    object alignment
  - objectHeaderSize
```
int objectHeaderSize()
```
    Returns the object header size.
    
    Returns:
    
    header size
  - arrayHeaderSize
```
int arrayHeaderSize()
```
    Returns the array header size. This includes the array length pseudofield.
    
    Returns:
    
    array header size
  - getBoolean
```
boolean getBoolean(Object obj,
                   long offset)
```
    Reads a boolean off the object at given offset.
    
    Parameters:
    
    obj - instance
    
    offset - offset
    
    Returns:
    
    the boolean
  - getByte
```
byte getByte(Object obj,
             long offset)
```
    Reads a byte off the object at given offset.
    
    Parameters:
    
    obj - instance
    
    offset - offset
    
    Returns:
    
    the byte
  - getShort
```
short getShort(Object obj,
               long offset)
```
    Reads a short off the object at given offset.
    
    Parameters:
    
    obj - instance
    
    offset - offset
    
    Returns:
    
    the short
  - getChar
```
char getChar(Object obj,
             long offset)
```
    Reads a char off the object at given offset.
    
    Parameters:
    
    obj - instance
    
    offset - offset
    
    Returns:
    
    the char
  - getInt
```
int getInt(Object obj,
           long offset)
```
    Reads an int off the object at given offset.
    
    Parameters:
    
    obj - instance
    
    offset - offset
    
    Returns:
    
    the int
  - getFloat
```
float getFloat(Object obj,
               long offset)
```
    Reads a float off the object at given offset.
    
    Parameters:
    
    obj - instance
    
    offset - offset
    
    Returns:
    
    the float
  - getLong
```
long getLong(Object obj,
             long offset)
```
    Reads a long off the object at given offset.
    
    Parameters:
    
    obj - instance
    
    offset - offset
    
    Returns:
    
    the long
  - getDouble
```
double getDouble(Object obj,
                 long offset)
```
    Reads a double off the object at given offset.
    
    Parameters:
    
    obj - instance
    
    offset - offset
    
    Returns:
    
    the double
  - getObject
```
Object getObject(Object obj,
                 long offset)
```
    Reads an object off the object at given offset.
    
    Parameters:
    
    obj - instance
    
    offset - offset
    
    Returns:
    
    the Object
  - details
```
String details()
```
    Returns the informational details about the current VM mode
    
    Returns:
    
    String details

Interface VirtualMachine

Method Summary

Method Detail

sizeOf

sizeOfField

addressOf

fieldOffset

arrayBaseOffset

arrayIndexScale

objectAlignment

objectHeaderSize

arrayHeaderSize

getBoolean

getByte

getShort

getChar

getInt

getFloat

getLong

getDouble

getObject

details