Package com.ibm.wala.analysis.stackMachine

Class AbstractIntStackMachine.BasicStackFlowProvider

java.lang.Object

com.ibm.wala.analysis.stackMachine.AbstractIntStackMachine.BasicStackFlowProvider

All Implemented Interfaces:

AbstractIntStackMachine.FlowProvider, Constants

Enclosing class:

AbstractIntStackMachine

protected abstract static class AbstractIntStackMachine.BasicStackFlowProvider
extends Object
implements AbstractIntStackMachine.FlowProvider, Constants

This gives some basic facilities for shoving things around on the stack. Client analyses should subclass this as needed.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	AbstractIntStackMachine.BasicStackFlowProvider.BasicStackMachineVisitor	Update the machine state to account for an instruction

Field Summary

Fields

Modifier and Type	Field	Description
protected AbstractIntStackMachine.MachineState	workingState

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

ACC_ABSTRACT, ACC_ANNOTATION, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MODULE, 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

Modifier	Constructor	Description
protected	BasicStackFlowProvider(ShrikeCFG cfg)	Only subclasses can instantiate

Method Summary

Modifier and Type	Method	Description
AbstractIntStackMachine.MachineState	flow(AbstractIntStackMachine.MachineState entry, ShrikeCFG.BasicBlock basicBlock)	Compute the MachineState at the exit of a basic block, given a MachineState at the block's entry.
AbstractIntStackMachine.MachineState	flow(AbstractIntStackMachine.MachineState entry, ShrikeCFG.BasicBlock from, ShrikeCFG.BasicBlock to)	Compute the MachineState at the end of an edge, given a MachineState at the edges's entry.
protected ShrikeCFG.BasicBlock	getCurrentBlock()
protected int	getCurrentInstructionIndex()
protected int	getCurrentProgramCounter()
protected ShrikeCFG.BasicBlock	getCurrentSuccessor()
abstract IInstruction[]	getInstructions()
protected void	init(AbstractIntStackMachine.BasicStackFlowProvider.BasicStackMachineVisitor v, IInstruction.Visitor ev)	Initialize the visitors used to perform the flow functions
boolean	needsEdgeFlow()
boolean	needsNodeFlow()

Methods inherited from class java.lang.Object

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

Field Details

workingState

protected AbstractIntStackMachine.MachineState workingState

Constructor Details

BasicStackFlowProvider

protected BasicStackFlowProvider(ShrikeCFG cfg)

Only subclasses can instantiate

Method Details

init

protected void init(AbstractIntStackMachine.BasicStackFlowProvider.BasicStackMachineVisitor v,
 IInstruction.Visitor ev)

Initialize the visitors used to perform the flow functions

needsNodeFlow

public boolean needsNodeFlow()

Specified by:

needsNodeFlow in interface AbstractIntStackMachine.FlowProvider

needsEdgeFlow

public boolean needsEdgeFlow()

Specified by:

needsEdgeFlow in interface AbstractIntStackMachine.FlowProvider

flow

public AbstractIntStackMachine.MachineState flow(AbstractIntStackMachine.MachineState entry,
 ShrikeCFG.BasicBlock basicBlock)

Description copied from interface: AbstractIntStackMachine.FlowProvider

Compute the MachineState at the exit of a basic block, given a MachineState at the block's entry.

Specified by:

flow in interface AbstractIntStackMachine.FlowProvider

flow

public AbstractIntStackMachine.MachineState flow(AbstractIntStackMachine.MachineState entry,
 ShrikeCFG.BasicBlock from,
 ShrikeCFG.BasicBlock to)

Description copied from interface: AbstractIntStackMachine.FlowProvider

Compute the MachineState at the end of an edge, given a MachineState at the edges's entry.

Specified by:

flow in interface AbstractIntStackMachine.FlowProvider

getCurrentInstructionIndex

protected int getCurrentInstructionIndex()

getCurrentProgramCounter

protected int getCurrentProgramCounter()

getCurrentBlock

protected ShrikeCFG.BasicBlock getCurrentBlock()

getCurrentSuccessor

protected ShrikeCFG.BasicBlock getCurrentSuccessor()

getInstructions

public abstract IInstruction[] getInstructions()