NeedsBackfillException

java.lang.Object
- java.lang.Throwable
- - java.lang.Exception
  - - ghidra.app.plugin.assembler.sleigh.expr.SolverException
    - - ghidra.app.plugin.assembler.sleigh.expr.NeedsBackfillException

All Implemented Interfaces:

java.io.Serializable
```
public class NeedsBackfillException
extends SolverException
```
An exception to indicate that the solution of an expression is not yet known Furthermore, it cannot be determined whether or not the expression is even solvable. When this exception is thrown, a backfill record is placed on the encoded resolution indicating that resolver must attempt to solve the expression again, once the encoding is otherwise complete. This is needed, most notably, when an encoding depends on the address of the next instruction, because the length of the current instruction is not known until resolution has finished. Backfill becomes a possibility when an expression depends on a symbol that is not (yet) defined. Thus, as a matter of good record keeping, the exception takes the name of the missing symbol.

See Also:

Serialized Form

- Constructor Summary
  
  Constructors
  Constructor Description
  
  NeedsBackfillException(java.lang.String symbol)
  Construct a backfill exception, resulting from the given missing symbol name
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  java.lang.String getSymbol()
  Retrieve the missing symbol name from the original solution attempt
  - Methods inherited from class java.lang.Throwable
    addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - NeedsBackfillException
```
public NeedsBackfillException(java.lang.String symbol)
```
    Construct a backfill exception, resulting from the given missing symbol name
    
    Parameters:
    
    symbol - the missing symbol name
- Method Detail
  - getSymbol
```
public java.lang.String getSymbol()
```
    Retrieve the missing symbol name from the original solution attempt
    
    Returns:
    
    the missing symbol name