GoPcValueEvaluator

java.lang.Object

ghidra.app.util.bin.format.golang.rtti.GoPcValueEvaluator

public class GoPcValueEvaluator extends Object

Evaluates a sequence of (value_delta,pc_delta) leb128 pairs to calculate a value for a certain PC location.

Constructor Summary

Constructors

Constructor

Description

GoPcValueEvaluator(GoFuncData func, long offset)

Creates a GoPcValueEvaluator instance, tied to the specified GoFuncData, starting at the specified offset in the moduledata's pctab.
Method Summary

Modifier and Type

Method

Description

int

eval(long targetPC)

Returns the value encoded into the table at the specified pc.

List<Integer>

evalAll(long targetPC)

Returns the set of all values for each unique pc section.

int

evalNext()

long

getMaxPC()

Returns the largest PC value calculated when evaluating the result of the table's sequence.

long

getPC()

void

reset()

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- GoPcValueEvaluator
  
  public GoPcValueEvaluator(GoFuncData func, long offset) throws IOException
  
  Creates a GoPcValueEvaluator instance, tied to the specified GoFuncData, starting at the specified offset in the moduledata's pctab.
  
  Parameters:
  
  func - GoFuncData
  
  offset - offset in moduledata's pctab
  
  Throws:
  
  IOException - if error reading pctab
Method Details
- getPC
  
  public long getPC()
- reset
  
  public void reset()
- getMaxPC
  
  public long getMaxPC() throws IOException
  
  Returns the largest PC value calculated when evaluating the result of the table's sequence.
  
  Returns:
  
  largest PC value encountered
  
  Throws:
  
  IOException - if error evaluating result
- eval
  
  public int eval(long targetPC) throws IOException
  
  Returns the value encoded into the table at the specified pc.
  
  Parameters:
  
  targetPC - pc
  
  Returns:
  
  value at specified pc, or -1 if error evaluating table
  
  Throws:
  
  IOException - if error reading data
- evalNext
  
  public int evalNext() throws IOException
  
  Throws:
  
  IOException
- evalAll
  
  public List<Integer> evalAll(long targetPC) throws IOException
  
  Returns the set of all values for each unique pc section.
  
  Parameters:
  
  targetPC - max pc to advance the sequence to when evaluating the table
  
  Returns:
  
  list of integer values
  
  Throws:
  
  IOException - if error reading data