Package ghidra.pcode.emu.jit.gen

Record Class FieldForExitSlot

java.lang.Object

java.lang.Record

ghidra.pcode.emu.jit.gen.FieldForExitSlot

Record Components:

target - the target address-contextreg pair of the branch exiting via this slot

All Implemented Interfaces:

FieldReq, InstanceFieldReq

public record FieldForExitSlot(JitPassage.AddrCtx target)
extends Record
implements InstanceFieldReq

A field request for an JitCompiledPassage.ExitSlot.

One of these is allocated per JitPassage.ExtBranch.to(). At run time, the first time a branch is encountered from this passage to the given target, the slot calls getEntry(target) and keeps the reference. Each subsequent encounter uses the kept reference. This reference is what gets returned by JitCompiledPassage.run(int), so now the thread already has in hand the next JitCompiledPassage.EntryPoint to execute.

Constructor Summary

Constructors

Constructor	Description
FieldForExitSlot(JitPassage.AddrCtx target)	Creates an instance of a FieldForExitSlot record class.

Method Summary

Modifier and Type	Method	Description
final boolean	equals(Object o)	Indicates whether some other object is "equal to" this one.
void	generateInitCode(JitCodeGenerator gen, org.objectweb.asm.ClassVisitor cv, org.objectweb.asm.MethodVisitor iv)	Emit the field declaration and its initialization bytecode
void	generateLoadCode(JitCodeGenerator gen, org.objectweb.asm.MethodVisitor rv)	Emit code to load the field onto the JVM stack
final int	hashCode()	Returns a hash code value for this object.
String	name()	Derive a suitable name for the field
JitPassage.AddrCtx	target()	Returns the value of the target record component.
final String	toString()	Returns a string representation of this record class.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

FieldForExitSlot

public FieldForExitSlot(JitPassage.AddrCtx target)

Creates an instance of a FieldForExitSlot record class.

Parameters:

target - the value for the target record component

Method Details

name

public String name()

Description copied from interface: FieldReq

Derive a suitable name for the field

Specified by:

name in interface FieldReq

Returns:

the name

generateInitCode

public void generateInitCode(JitCodeGenerator gen,
 org.objectweb.asm.ClassVisitor cv,
 org.objectweb.asm.MethodVisitor iv)

Emit the field declaration and its initialization bytecode

The declaration is emitted into the class definition, and the initialization code is emitted into the class constructor.

Consider the target (ram:00401234,ctx=80000000). The declaration is equivalent to:

 private final JitCompiledPassage.ExitSlot exit_401234_80000000;
 

And the initialization is equivalent to:

 exit_401234_80000000 = createExitSlot(0x401234, CTX_80000000);
 

Note that this method will ensure the CTX_... field is allocated and loads its value as needed.

Specified by:

generateInitCode in interface InstanceFieldReq

Parameters:

gen - the code generator

cv - the visitor for the class definition

iv - the visitor for the class constructor

generateLoadCode

public void generateLoadCode(JitCodeGenerator gen,
 org.objectweb.asm.MethodVisitor rv)

Description copied from interface: FieldReq

Emit code to load the field onto the JVM stack

Specified by:

generateLoadCode in interface FieldReq

Parameters:

gen - the code generator

rv - the visitor often for the run method, but could be the static initializer or constructor

toString

public final String toString()

Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.

Specified by:

toString in class Record

Returns:

a string representation of this object

hashCode

public final int hashCode()

Returns a hash code value for this object. The value is derived from the hash code of each of the record components.

Specified by:

hashCode in class Record

Returns:

a hash code value for this object

equals

public final boolean equals(Object o)

Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. All components in this record class are compared with Objects::equals(Object,Object).

Specified by:

equals in class Record

Parameters:

o - the object with which to compare

Returns:

true if this object is the same as the o argument; false otherwise.

target

public JitPassage.AddrCtx target()

Returns the value of the target record component.

Returns:

the value of the target record component