depends.org.objectweb.asmcloudwise.tree.analysis

类 Interpreter<V extends Value>

java.lang.Object

depends.org.objectweb.asmcloudwise.tree.analysis.Interpreter<V>

类型参数:

V - category of the Value used for the analysis.

直接已知子类:

BasicInterpreter, SourceInterpreter

public abstract class Interpreter<V extends Value>
extends java.lang.Object

A semantic bytecode interpreter. More precisely, this interpreter only manages the computation of values from extension 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.

字段概要

字段

限定符和类型	字段和说明
protected int	api

构造器概要

构造器

限定符	构造器和说明
protected	Interpreter(int api)

方法概要

方法

限定符和类型	方法和说明
abstract V	binaryOperation(AbstractInsnNode insn, V value1, V value2) Interprets a bytecode instruction with two arguments.
abstract V	copyOperation(AbstractInsnNode insn, V value) Interprets a bytecode instruction that moves a value on the stack or to or from local variables.
abstract V	merge(V v, V w) Merges two values.
abstract V	naryOperation(AbstractInsnNode insn, java.util.List<? extends V> values) Interprets a bytecode instruction with a variable number of arguments.
abstract V	newOperation(AbstractInsnNode insn) Interprets a bytecode instruction without arguments.
abstract V	newValue(Type type) Creates a new value that represents the given category.
abstract void	returnOperation(AbstractInsnNode insn, V value, V expected) Interprets a bytecode return instruction.
abstract V	ternaryOperation(AbstractInsnNode insn, V value1, V value2, V value3) Interprets a bytecode instruction with three arguments.
abstract V	unaryOperation(AbstractInsnNode insn, V value) Interprets a bytecode instruction with a single argument.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

api

protected final int api

构造器详细资料

Interpreter

protected Interpreter(int api)

方法详细资料

newValue

public abstract V newValue(Type type)

Creates a new value that represents the given category. Called for method parameters (including this), exception handler variable and with null category for variables reserved by long and double types.

参数:

category - a primitive or reference category, or null to represent an uninitialized value.

返回:

a value that represents the given category. The size of the returned value must be equal to the size of the given category.

newOperation

public abstract V newOperation(AbstractInsnNode insn)
                                      throws AnalyzerException

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

参数:

insn - the bytecode instruction to be interpreted.

返回:

the result of the interpretation of the given instruction.

抛出:

AnalyzerException - if an error occured during the interpretation.

copyOperation

public abstract V copyOperation(AbstractInsnNode insn,
              V value)
                                       throws AnalyzerException

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

参数:

insn - the bytecode instruction to be interpreted.

value - the value that must be moved by the instruction.

返回:

the result of the interpretation of the given instruction. The returned value must be equal to the given value.

抛出:

AnalyzerException - if an error occured during the interpretation.

unaryOperation

public abstract V unaryOperation(AbstractInsnNode insn,
               V value)
                                        throws AnalyzerException

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

参数:

insn - the bytecode instruction to be interpreted.

value - the argument of the instruction to be interpreted.

返回:

the result of the interpretation of the given instruction.

抛出:

AnalyzerException - if an error occured during the interpretation.

binaryOperation

public abstract V binaryOperation(AbstractInsnNode insn,
                V value1,
                V value2)
                                         throws AnalyzerException

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

参数:

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.

返回:

the result of the interpretation of the given instruction.

抛出:

AnalyzerException - if an error occured during the interpretation.

ternaryOperation

public abstract V ternaryOperation(AbstractInsnNode insn,
                 V value1,
                 V value2,
                 V value3)
                                          throws AnalyzerException

Interprets a bytecode instruction with three arguments. This method is called for the following opcodes: IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE

参数:

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.

返回:

the result of the interpretation of the given instruction.

抛出:

AnalyzerException - if an error occured during the interpretation.

naryOperation

public abstract V naryOperation(AbstractInsnNode insn,
              java.util.List<? extends V> values)
                                       throws AnalyzerException

Interprets a bytecode instruction with a variable number of arguments. This method is called for the following opcodes: INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE, MULTIANEWARRAY and INVOKEDYNAMIC

参数:

insn - the bytecode instruction to be interpreted.

values - the arguments of the instruction to be interpreted.

返回:

the result of the interpretation of the given instruction.

抛出:

AnalyzerException - if an error occured during the interpretation.

returnOperation

public abstract void returnOperation(AbstractInsnNode insn,
                   V value,
                   V expected)
                              throws AnalyzerException

Interprets a bytecode return instruction. This method is called for the following opcodes: IRETURN, LRETURN, FRETURN, DRETURN, ARETURN

参数:

insn - the bytecode instruction to be interpreted.

value - the argument of the instruction to be interpreted.

expected - the expected return category of the analyzed method.

抛出:

AnalyzerException - if an error occured during the interpretation.

merge

public abstract V merge(V v,
      V w)

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 category 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 extension types of values).

参数:

v - a value.

w - another value.

返回:

the merged value. If the merged value is equal to v, this method must return v.