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avrora.stack
Class AbstractInterpreter

java.lang.Object
  extended byavrora.stack.AbstractArithmetic
      extended byavrora.stack.AbstractInterpreter
All Implemented Interfaces:
InstrVisitor
public class AbstractInterpreter
extends AbstractArithmetic
implements InstrVisitor

The AbstractInterpreter class implements the abstract transfer function for each instruction type. Given an abstract state, it updates the abstract state according to the semantics of each instruction. The abstract interpreter works on the simple instructions. For complex instructions such as calls, returns, and pushes, it consults a Policy instance that implements the context sensitivity/insensitivity and stack modelling behavior of the particular analysis.

The AbstractInterpreter works on abstract values and uses abstract arithmetic. It operates on instances of the AbstractState class that represent the state of the processor.

See Also:
AbstractArithmetic, MutableState

Field Summary
protected  StateCache.State oldState
           
protected  AnalyzerPolicy policy
           
protected  Program program
           
protected  MutableState state
           
 
Fields inherited from class avrora.stack.AbstractArithmetic
FALSE, TRUE, UNKNOWN, ZERO
 
Method Summary
 void computeNextStates(StateCache.State os)
          The computeNextStates() method computes the possible next states that follow the given immutable old state and then will push them to the AnalyzerPolicy instance that was passed in the constructor to this interpreter instance.
 void visit(Instr.ADC i)
           
 void visit(Instr.ADD i)
           
 void visit(Instr.ADIW i)
           
 void visit(Instr.AND i)
           
 void visit(Instr.ANDI i)
           
 void visit(Instr.ASR i)
           
 void visit(Instr.BCLR i)
           
 void visit(Instr.BLD i)
           
 void visit(Instr.BRBC i)
           
 void visit(Instr.BRBS i)
           
 void visit(Instr.BRCC i)
           
 void visit(Instr.BRCS i)
           
 void visit(Instr.BREAK i)
           
 void visit(Instr.BREQ i)
           
 void visit(Instr.BRGE i)
           
 void visit(Instr.BRHC i)
           
 void visit(Instr.BRHS i)
           
 void visit(Instr.BRID i)
           
 void visit(Instr.BRIE i)
           
 void visit(Instr.BRLO i)
           
 void visit(Instr.BRLT i)
           
 void visit(Instr.BRMI i)
           
 void visit(Instr.BRNE i)
           
 void visit(Instr.BRPL i)
           
 void visit(Instr.BRSH i)
           
 void visit(Instr.BRTC i)
           
 void visit(Instr.BRTS i)
           
 void visit(Instr.BRVC i)
           
 void visit(Instr.BRVS i)
           
 void visit(Instr.BSET i)
           
 void visit(Instr.BST i)
           
 void visit(Instr.CALL i)
           
 void visit(Instr.CBI i)
           
 void visit(Instr.CBR i)
           
 void visit(Instr.CLC i)
           
 void visit(Instr.CLH i)
           
 void visit(Instr.CLI i)
           
 void visit(Instr.CLN i)
           
 void visit(Instr.CLR i)
           
 void visit(Instr.CLS i)
           
 void visit(Instr.CLT i)
           
 void visit(Instr.CLV i)
           
 void visit(Instr.CLZ i)
           
 void visit(Instr.COM i)
           
 void visit(Instr.CP i)
           
 void visit(Instr.CPC i)
           
 void visit(Instr.CPI i)
           
 void visit(Instr.CPSE i)
           
 void visit(Instr.DEC i)
           
 void visit(Instr.EICALL i)
           
 void visit(Instr.EIJMP i)
           
 void visit(Instr.ELPM i)
           
 void visit(Instr.ELPMD i)
           
 void visit(Instr.ELPMPI i)
           
 void visit(Instr.EOR i)
           
 void visit(Instr.FMUL i)
           
 void visit(Instr.FMULS i)
           
 void visit(Instr.FMULSU i)
           
 void visit(Instr.ICALL i)
           
 void visit(Instr.IJMP i)
           
 void visit(Instr.IN i)
           
 void visit(Instr.INC i)
           
 void visit(Instr.JMP i)
           
 void visit(Instr.LD i)
           
 void visit(Instr.LDD i)
           
 void visit(Instr.LDI i)
           
 void visit(Instr.LDPD i)
           
 void visit(Instr.LDPI i)
           
 void visit(Instr.LDS i)
           
 void visit(Instr.LPM i)
           
 void visit(Instr.LPMD i)
           
 void visit(Instr.LPMPI i)
           
 void visit(Instr.LSL i)
           
 void visit(Instr.LSR i)
           
 void visit(Instr.MOV i)
           
 void visit(Instr.MOVW i)
           
 void visit(Instr.MUL i)
           
 void visit(Instr.MULS i)
           
 void visit(Instr.MULSU i)
           
 void visit(Instr.NEG i)
           
 void visit(Instr.NOP i)
           
 void visit(Instr.OR i)
           
 void visit(Instr.ORI i)
           
 void visit(Instr.OUT i)
           
 void visit(Instr.POP i)
           
 void visit(Instr.PUSH i)
           
 void visit(Instr.RCALL i)
           
 void visit(Instr.RET i)
           
 void visit(Instr.RETI i)
           
 void visit(Instr.RJMP i)
           
 void visit(Instr.ROL i)
           
 void visit(Instr.ROR i)
           
 void visit(Instr.SBC i)
           
 void visit(Instr.SBCI i)
           
 void visit(Instr.SBI i)
           
 void visit(Instr.SBIC i)
           
 void visit(Instr.SBIS i)
           
 void visit(Instr.SBIW i)
           
 void visit(Instr.SBR i)
           
 void visit(Instr.SBRC i)
           
 void visit(Instr.SBRS i)
           
 void visit(Instr.SEC i)
           
 void visit(Instr.SEH i)
           
 void visit(Instr.SEI i)
           
 void visit(Instr.SEN i)
           
 void visit(Instr.SER i)
           
 void visit(Instr.SES i)
           
 void visit(Instr.SET i)
           
 void visit(Instr.SEV i)
           
 void visit(Instr.SEZ i)
           
 void visit(Instr.SLEEP i)
           
 void visit(Instr.SPM i)
           
 void visit(Instr.ST i)
           
 void visit(Instr.STD i)
           
 void visit(Instr.STPD i)
           
 void visit(Instr.STPI i)
           
 void visit(Instr.STS i)
           
 void visit(Instr.SUB i)
           
 void visit(Instr.SUBI i)
           
 void visit(Instr.SWAP i)
           
 void visit(Instr.TST i)
           
 void visit(Instr.WDR i)
           
 
Methods inherited from class avrora.stack.AbstractArithmetic
add, and, and, areEqual, areKnown, bitsOf, bitToChar, canon, canon, ceiling, ceiling, commonMask, commonMask, couldBeEqual, couldBeZero, couldBeZero, decrement, floor, floor, getBit, increment, isUnknown, knownBitsOf, knownVal, logicalAnd, maskOf, merge, merge, merge, merge, merge, mergeMask, not, or, or, setBit, shiftLeftOne, shiftLeftOne, subtract, toShortString, toString, toString, xor
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

policy

protected final AnalyzerPolicy policy

program

protected final Program program

oldState

protected StateCache.State oldState

state

protected MutableState state
Method Detail

computeNextStates

public void computeNextStates(StateCache.State os)
The computeNextStates() method computes the possible next states that follow the given immutable old state and then will push them to the AnalyzerPolicy instance that was passed in the constructor to this interpreter instance.

Parameters:
os - the immutable old state to compute the next state from

visit

public void visit(Instr.ADC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ADD i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ADIW i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.AND i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ANDI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ASR i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BCLR i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BLD i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRBC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRBS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRCC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRCS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BREAK i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BREQ i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRGE i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRHC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRHS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRID i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRIE i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRLO i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRLT i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRMI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRNE i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRPL i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRSH i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRTC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRTS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRVC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BRVS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BSET i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.BST i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CALL i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CBI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CBR i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CLC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CLH i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CLI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CLN i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CLR i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CLS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CLT i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CLV i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CLZ i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.COM i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CP i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CPC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CPI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.CPSE i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.DEC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.EICALL i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.EIJMP i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ELPM i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ELPMD i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ELPMPI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.EOR i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.FMUL i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.FMULS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.FMULSU i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ICALL i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.IJMP i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.IN i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.INC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.JMP i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.LD i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.LDD i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.LDI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.LDPD i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.LDPI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.LDS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.LPM i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.LPMD i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.LPMPI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.LSL i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.LSR i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.MOV i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.MOVW i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.MUL i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.MULS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.MULSU i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.NEG i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.NOP i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.OR i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ORI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.OUT i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.POP i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.PUSH i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.RCALL i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.RET i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.RETI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.RJMP i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ROL i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ROR i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SBC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SBCI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SBI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SBIC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SBIS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SBIW i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SBR i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SBRC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SBRS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SEC i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SEH i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SEI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SEN i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SER i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SES i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SET i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SEV i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SEZ i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SLEEP i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SPM i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.ST i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.STD i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.STPD i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.STPI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.STS i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SUB i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SUBI i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.SWAP i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.TST i)
Specified by:
visit in interface InstrVisitor

visit

public void visit(Instr.WDR i)
Specified by:
visit in interface InstrVisitor
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SUMMARY: NESTED | FIELD | CONSTR | METHOD DETAIL: FIELD | CONSTR | METHOD