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Java Source Code / Java Documentation » IDE » tIDE » org.objectweb.asm.tree.analysis 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.objectweb.asm.tree.analysis.Interpreter

All known Subclasses:   org.objectweb.asm.tree.analysis.SourceInterpreter,  org.objectweb.asm.tree.analysis.BasicInterpreter,
Interpreter
public interface Interpreter (Code)
A semantic bytecode interpreter. More precisely, this interpreter only manages the computation of values from other values: it does not manage the transfer of values to or from the stack, and to or from the local variables. This separation allows a generic bytecode Analyzer to work with various semantic interpreters, without needing to duplicate the code to simulate the transfer of values.
author:
   Eric Bruneton




Method Summary
 ValuebinaryOperation(AbstractInsnNode insn, Value value1, Value value2)
     Interprets a bytecode instruction with two arguments.
 ValuecopyOperation(AbstractInsnNode insn, Value value)
     Interprets a bytecode instruction that moves a value on the stack or to or from local variables.
 Valuemerge(Value v, Value w)
     Merges two values.
 ValuenaryOperation(AbstractInsnNode insn, List values)
     Interprets a bytecode instruction with a variable number of arguments. This method is called for the following opcodes: INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE, MULTIANEWARRAY
Parameters:
  insn - the bytecode instruction to be interpreted.
Parameters:
  values - the arguments of the instruction to be interpreted.
 ValuenewOperation(AbstractInsnNode insn)
     Interprets a bytecode instruction without arguments.
 ValuenewValue(Type type)
     Creates a new value that represents the given type. Called for method parameters (including this), exception handler variable and with null type for variables reserved by long and double types.
Parameters:
  type - a primitive or reference type, or null torepresent an uninitialized value.
 ValueternaryOperation(AbstractInsnNode insn, Value value1, Value value2, Value value3)
     Interprets a bytecode instruction with three arguments.
 ValueunaryOperation(AbstractInsnNode insn, Value value)
     Interprets a bytecode instruction with a single argument.



Method Detail
binaryOperation
Value binaryOperation(AbstractInsnNode insn, Value value1, Value value2) throws AnalyzerException(Code)
Interprets a bytecode instruction with two arguments. This method is called for the following opcodes: IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, PUTFIELD
Parameters:
  insn - the bytecode instruction to be interpreted.
Parameters:
  value1 - the first argument of the instruction to be interpreted.
Parameters:
  value2 - the second argument of the instruction to be interpreted. the result of the interpretation of the given instruction.
throws:
  AnalyzerException - if an error occured during the interpretation.



copyOperation
Value copyOperation(AbstractInsnNode insn, Value value) throws AnalyzerException(Code)
Interprets a bytecode instruction that moves a value on the stack or to or from local variables. This method is called for the following opcodes: ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP
Parameters:
  insn - the bytecode instruction to be interpreted.
Parameters:
  value - the value that must be moved by the instruction. the result of the interpretation of the given instruction. Thereturned value must be equal to the given value.
throws:
  AnalyzerException - if an error occured during the interpretation.



merge
Value merge(Value v, Value w)(Code)
Merges two values. The merge operation must return a value that represents both values (for instance, if the two values are two types, the merged value must be a common super type of the two types. If the two values are integer intervals, the merged value must be an interval that contains the previous ones. Likewise for other types of values).
Parameters:
  v - a value.
Parameters:
  w - another value. the merged value. If the merged value is equal to v,this method must return v.



naryOperation
Value naryOperation(AbstractInsnNode insn, List values) throws AnalyzerException(Code)
Interprets a bytecode instruction with a variable number of arguments. This method is called for the following opcodes: INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE, MULTIANEWARRAY
Parameters:
  insn - the bytecode instruction to be interpreted.
Parameters:
  values - the arguments of the instruction to be interpreted. the result of the interpretation of the given instruction.
throws:
  AnalyzerException - if an error occured during the interpretation.



newOperation
Value newOperation(AbstractInsnNode insn) throws AnalyzerException(Code)
Interprets a bytecode instruction without arguments. This method is called for the following opcodes: ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, BIPUSH, SIPUSH, LDC, JSR, GETSTATIC, NEW
Parameters:
  insn - the bytecode instruction to be interpreted. the result of the interpretation of the given instruction.
throws:
  AnalyzerException - if an error occured during the interpretation.



newValue
Value newValue(Type type)(Code)
Creates a new value that represents the given type. Called for method parameters (including this), exception handler variable and with null type for variables reserved by long and double types.
Parameters:
  type - a primitive or reference type, or null torepresent an uninitialized value. a value that represents the given type. The size of the returnedvalue must be equal to the size of the given type.



ternaryOperation
Value ternaryOperation(AbstractInsnNode insn, Value value1, Value value2, Value value3) throws AnalyzerException(Code)
Interprets a bytecode instruction with three arguments. This method is called for the following opcodes: IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE
Parameters:
  insn - the bytecode instruction to be interpreted.
Parameters:
  value1 - the first argument of the instruction to be interpreted.
Parameters:
  value2 - the second argument of the instruction to be interpreted.
Parameters:
  value3 - the third argument of the instruction to be interpreted. the result of the interpretation of the given instruction.
throws:
  AnalyzerException - if an error occured during the interpretation.



unaryOperation
Value unaryOperation(AbstractInsnNode insn, Value value) throws AnalyzerException(Code)
Interprets a bytecode instruction with a single argument. This method is called for the following opcodes: INEG, LNEG, FNEG, DNEG, IINC, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S, IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, TABLESWITCH, LOOKUPSWITCH, IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, PUTSTATIC, GETFIELD, NEWARRAY, ANEWARRAY, ARRAYLENGTH, ATHROW, CHECKCAST, INSTANCEOF, MONITORENTER, MONITOREXIT, IFNULL, IFNONNULL
Parameters:
  insn - the bytecode instruction to be interpreted.
Parameters:
  value - the argument of the instruction to be interpreted. the result of the interpretation of the given instruction.
throws:
  AnalyzerException - if an error occured during the interpretation.



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