Class SourceInterpreter

java.lang.Object
org.objectweb.asm.tree.analysis.SourceInterpreter
All Implemented Interfaces:
Opcodes, Interpreter
public class SourceInterpreter extends Object implements Opcodes, Interpreter
An Interpreter for SourceValue values.
Author:
Eric Bruneton

  • Constructor Details

    • SourceInterpreter

      public SourceInterpreter()

  • Method Details

    • newValue

      public Value newValue(Type type)
      Description copied from interface: Interpreter
      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.
      Specified by:
      newValue in interface Interpreter
      Parameters:
      type - a primitive or reference type, or null to represent an uninitialized value.
      Returns:
      a value that represents the given type. The size of the returned value must be equal to the size of the given type.

    • newOperation

      public Value newOperation(AbstractInsnNode insn)
      Description copied from interface: Interpreter
      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
      Specified by:
      newOperation in interface Interpreter
      Parameters:
      insn - the bytecode instruction to be interpreted.
      Returns:
      the result of the interpretation of the given instruction.

    • copyOperation

      public Value copyOperation(AbstractInsnNode insn, Value value)
      Description copied from interface: Interpreter
      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
      Specified by:
      copyOperation in interface Interpreter
      Parameters:
      insn - the bytecode instruction to be interpreted.
      value - the value that must be moved by the instruction.
      Returns:
      the result of the interpretation of the given instruction. The returned value must be equal to the given value.

    • unaryOperation

      public Value unaryOperation(AbstractInsnNode insn, Value value)
      Description copied from interface: Interpreter
      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
      Specified by:
      unaryOperation in interface Interpreter
      Parameters:
      insn - the bytecode instruction to be interpreted.
      value - the argument of the instruction to be interpreted.
      Returns:
      the result of the interpretation of the given instruction.

    • binaryOperation

      public Value binaryOperation(AbstractInsnNode insn, Value value1, Value value2)
      Description copied from interface: Interpreter
      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
      Specified by:
      binaryOperation in interface Interpreter
      Parameters:
      insn - the bytecode instruction to be interpreted.
      value1 - the first argument of the instruction to be interpreted.
      value2 - the second argument of the instruction to be interpreted.
      Returns:
      the result of the interpretation of the given instruction.

    • ternaryOperation

      public Value ternaryOperation(AbstractInsnNode insn, Value value1, Value value2, Value value3)
      Description copied from interface: Interpreter
      Interprets a bytecode instruction with three arguments. This method is called for the following opcodes: IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE
      Specified by:
      ternaryOperation in interface Interpreter
      Parameters:
      insn - the bytecode instruction to be interpreted.
      value1 - the first argument of the instruction to be interpreted.
      value2 - the second argument of the instruction to be interpreted.
      value3 - the third argument of the instruction to be interpreted.
      Returns:
      the result of the interpretation of the given instruction.

    • naryOperation

      public Value naryOperation(AbstractInsnNode insn, List values)
      Description copied from interface: Interpreter
      Interprets a bytecode instruction with a variable number of arguments. This method is called for the following opcodes: INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE, MULTIANEWARRAY
      Specified by:
      naryOperation in interface Interpreter
      Parameters:
      insn - the bytecode instruction to be interpreted.
      values - the arguments of the instruction to be interpreted.
      Returns:
      the result of the interpretation of the given instruction.

    • returnOperation

      public void returnOperation(AbstractInsnNode insn, Value value, Value expected)
      Description copied from interface: Interpreter
      Interprets a bytecode return instruction. This method is called for the following opcodes: IRETURN, LRETURN, FRETURN, DRETURN, ARETURN
      Specified by:
      returnOperation in interface Interpreter
      Parameters:
      insn - the bytecode instruction to be interpreted.
      value - the argument of the instruction to be interpreted.
      expected - the expected return type of the analyzed method.

    • merge

      public Value merge(Value v, Value w)
      Description copied from interface: Interpreter
      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).
      Specified by:
      merge in interface Interpreter
      Parameters:
      v - a value.
      w - another value.
      Returns:
      the merged value. If the merged value is equal to v, this method must return v.