com.ibm.wala.shrikeBT

Class ConstantInstruction

java.lang.Object

com.ibm.wala.shrikeBT.Instruction

com.ibm.wala.shrikeBT.ConstantInstruction

All Implemented Interfaces:

Constants, IInstruction, Cloneable

public abstract class ConstantInstruction
extends Instruction

A ConstantInstruction pushes some constant value onto the stack.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ConstantInstruction.ClassToken
static class	ConstantInstruction.InvokeDynamicToken

Nested classes/interfaces inherited from interface com.ibm.wala.shrikeBT.IInstruction

IInstruction.Visitor

Field Summary

Fields inherited from class com.ibm.wala.shrikeBT.Instruction

noInstructions

Fields inherited from interface com.ibm.wala.shrikeBT.Constants

ACC_ABSTRACT, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VOLATILE, CONSTANT_Class, CONSTANT_Double, CONSTANT_FieldRef, CONSTANT_Float, CONSTANT_Integer, CONSTANT_InterfaceMethodRef, CONSTANT_InvokeDynamic, CONSTANT_Long, CONSTANT_MethodHandle, CONSTANT_MethodRef, CONSTANT_MethodType, CONSTANT_NameAndType, CONSTANT_String, CONSTANT_Utf8, indexedTypes, indexedTypes_T, MAYBE, NO, OP_aaload, OP_aastore, OP_aconst_null, OP_aload, OP_aload_0, OP_aload_1, OP_aload_2, OP_aload_3, OP_anewarray, OP_areturn, OP_arraylength, OP_astore, OP_astore_0, OP_astore_1, OP_astore_2, OP_astore_3, OP_athrow, OP_baload, OP_bastore, OP_bipush, OP_caload, OP_castore, OP_checkcast, OP_d2f, OP_d2i, OP_d2l, OP_dadd, OP_daload, OP_dastore, OP_dcmpg, OP_dcmpl, OP_dconst_0, OP_dconst_1, OP_ddiv, OP_dload, OP_dload_0, OP_dload_1, OP_dload_2, OP_dload_3, OP_dmul, OP_dneg, OP_drem, OP_dreturn, OP_dstore, OP_dstore_0, OP_dstore_1, OP_dstore_2, OP_dstore_3, OP_dsub, OP_dup, OP_dup_x1, OP_dup_x2, OP_dup2, OP_dup2_x1, OP_dup2_x2, OP_f2d, OP_f2i, OP_f2l, OP_fadd, OP_faload, OP_fastore, OP_fcmpg, OP_fcmpl, OP_fconst_0, OP_fconst_1, OP_fconst_2, OP_fdiv, OP_fload, OP_fload_0, OP_fload_1, OP_fload_2, OP_fload_3, OP_fmul, OP_fneg, OP_frem, OP_freturn, OP_fstore, OP_fstore_0, OP_fstore_1, OP_fstore_2, OP_fstore_3, OP_fsub, OP_getfield, OP_getstatic, OP_goto, OP_goto_w, OP_i2b, OP_i2c, OP_i2d, OP_i2f, OP_i2l, OP_i2s, OP_iadd, OP_iaload, OP_iand, OP_iastore, OP_iconst_0, OP_iconst_1, OP_iconst_2, OP_iconst_3, OP_iconst_4, OP_iconst_5, OP_iconst_m1, OP_idiv, OP_if_acmpeq, OP_if_acmpne, OP_if_icmpeq, OP_if_icmpge, OP_if_icmpgt, OP_if_icmple, OP_if_icmplt, OP_if_icmpne, OP_ifeq, OP_ifge, OP_ifgt, OP_ifle, OP_iflt, OP_ifne, OP_ifnonnull, OP_ifnull, OP_iinc, OP_iload, OP_iload_0, OP_iload_1, OP_iload_2, OP_iload_3, OP_imul, OP_ineg, OP_instanceof, OP_invokedynamic, OP_invokeinterface, OP_invokespecial, OP_invokestatic, OP_invokevirtual, OP_ior, OP_irem, OP_ireturn, OP_ishl, OP_ishr, OP_istore, OP_istore_0, OP_istore_1, OP_istore_2, OP_istore_3, OP_isub, OP_iushr, OP_ixor, OP_jsr, OP_jsr_w, OP_l2d, OP_l2f, OP_l2i, OP_ladd, OP_laload, OP_land, OP_lastore, OP_lcmp, OP_lconst_0, OP_lconst_1, OP_ldc, OP_ldc_w, OP_ldc2_w, OP_ldiv, OP_lload, OP_lload_0, OP_lload_1, OP_lload_2, OP_lload_3, OP_lmul, OP_lneg, OP_lookupswitch, OP_lor, OP_lrem, OP_lreturn, OP_lshl, OP_lshr, OP_lstore, OP_lstore_0, OP_lstore_1, OP_lstore_2, OP_lstore_3, OP_lsub, OP_lushr, OP_lxor, OP_monitorenter, OP_monitorexit, OP_multianewarray, OP_new, OP_newarray, OP_nop, OP_pop, OP_pop2, OP_putfield, OP_putstatic, OP_ret, OP_return, OP_saload, OP_sastore, OP_sipush, OP_swap, OP_tableswitch, OP_wide, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TYPE_boolean, TYPE_boolean_index, TYPE_byte, TYPE_byte_index, TYPE_char, TYPE_char_index, TYPE_Class, TYPE_double, TYPE_double_index, TYPE_Error, TYPE_Exception, TYPE_float, TYPE_float_index, TYPE_int, TYPE_int_index, TYPE_long, TYPE_long_index, TYPE_MethodHandle, TYPE_MethodType, TYPE_null, TYPE_Object, TYPE_Object_index, TYPE_RuntimeException, TYPE_short, TYPE_short_index, TYPE_String, TYPE_Throwable, TYPE_unknown, TYPE_void, YES

Constructor Summary

Constructors

Constructor and Description
ConstantInstruction(short opcode)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
String	getPushedType(String[] types) Computes the type of data pushed onto the stack, or null if none is pushed.
byte	getPushedWordSize()
abstract String	getType()
abstract Object	getValue()
int	hashCode()
boolean	isPEI() PEI == "Potentially excepting instruction"
static ConstantInstruction	make(ConstantPoolReader cp, int index)
static ConstantInstruction	make(double d)
static ConstantInstruction	make(float f)
static ConstantInstruction	make(int i)
static ConstantInstruction	make(long l)
static ConstantInstruction	make(String type, Object constant)
static ConstantInstruction	makeClass(String s)
static ConstantInstruction	makeString(String s)
String	toString() Subclasses must implement toString.
void	visit(IInstruction.Visitor v) Apply a Visitor to this instruction.

Methods inherited from class com.ibm.wala.shrikeBT.Instruction

clone, getBranchTargets, getOpcode, getPoppedCount, isFallThrough, redirectTargets

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ConstantInstruction

public ConstantInstruction(short opcode)

Method Detail

getValue

public abstract Object getValue()

Returns:

the constant value pushed: an Integer, a Long, a Float, a Double, a String, or null

getType

public abstract String getType()

Returns:

the type of the value pushed

make

public static ConstantInstruction make(String type,
                                       Object constant)
                                throws IllegalArgumentException

Throws:

IllegalArgumentException

make

public static ConstantInstruction make(int i)

make

public static ConstantInstruction make(long l)

make

public static ConstantInstruction make(float f)

make

public static ConstantInstruction make(double d)

makeString

public static ConstantInstruction makeString(String s)

makeClass

public static ConstantInstruction makeClass(String s)

make

public static ConstantInstruction make(ConstantPoolReader cp,
                                       int index)

equals

public final boolean equals(Object o)

Overrides:

equals in class Object

getPushedType

public final String getPushedType(String[] types)

Description copied from class: Instruction

Computes the type of data pushed onto the stack, or null if none is pushed.

Specified by:

getPushedType in interface IInstruction

Overrides:

getPushedType in class Instruction

Parameters:

types - the types of the data popped off the stack by this instruction; if poppedTypes is null, then we don't know the incoming stack types and the result of this method may be less accurate

getPushedWordSize

public final byte getPushedWordSize()

Specified by:

getPushedWordSize in interface IInstruction

Overrides:

getPushedWordSize in class Instruction

Returns:

the JVM word size of the value this instruction pushes onto the stack, or 0 if this instruction doesn't push anything onto the stack.

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

visit

public final void visit(IInstruction.Visitor v)
                 throws NullPointerException

Description copied from class: Instruction

Apply a Visitor to this instruction. We invoke the appropriate Visitor method according to the type of this instruction.

Specified by:

visit in interface IInstruction

Specified by:

visit in class Instruction

Throws:

NullPointerException

toString

public final String toString()

Description copied from class: Instruction

Subclasses must implement toString.

Specified by:

toString in interface IInstruction

Specified by:

toString in class Instruction

isPEI

public boolean isPEI()

Description copied from interface: IInstruction

PEI == "Potentially excepting instruction"

Returns:

true iff this instruction might throw an exception