Class JavaLanguage

java.lang.Object

com.ibm.wala.classLoader.LanguageImpl

com.ibm.wala.classLoader.JavaLanguage

All Implemented Interfaces:

BytecodeLanguage, Language, Constants

public class JavaLanguage
extends LanguageImpl
implements BytecodeLanguage, Constants

The implementation of Language which defines Java semantics.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	JavaLanguage.JavaInstructionFactory

Field Summary

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

Fields inherited from interface com.ibm.wala.classLoader.Language

JAVA

Constructor Summary

Constructors

Constructor	Description
JavaLanguage()

Method Summary

Modifier and Type	Method	Description
static Collection<TypeReference>	getAaStoreExceptions()
static Collection<TypeReference>	getArithmeticException()
static Collection<TypeReference>	getArrayAccessExceptions()
TypeReference[]	getArrayInterfaces()	get the interfaces implemented by all arrays in the language
static Collection<TypeReference>	getClassCastException()
static Collection<TypeReference>	getClassNotFoundException()
TypeReference	getConstantType(Object o)	Given a Java constant o, return the appropriate language type to associate with the constant.
static Collection<TypeReference>	getExceptionInInitializerError()
AbstractRootMethod	getFakeRootMethod(IClassHierarchy cha, AnalysisOptions options, IAnalysisCacheView cache)
Collection<TypeReference>	getImplicitExceptionTypes(IInstruction pei)
MethodReference	getInvokeMethodReference(ClassLoaderReference loader, IInvokeInstruction instruction)
Object	getMetadataToken(Object value)	Get the representation of the meta-data corresponding to value.
Atom	getName()	What is the name of the language?
static Collection<TypeReference>	getNewArrayExceptions()
static Collection<TypeReference>	getNewSafeArrayExceptions()
static Collection<TypeReference>	getNewScalarExceptions()
static Collection<TypeReference>	getNullPointerException()
TypeReference	getPointerType(TypeReference pointee)
PrimitiveType	getPrimitive(TypeReference reference)	get the abstraction of a primitive type to be used for type inference
TypeReference	getRootType()	What is the root type in a type hierarchy for this language? e.g.
TypeReference	getStringType()
TypeReference	getThrowableType()	What is the root type of exceptions in this language? e.g.
Collection<TypeReference>	inferInvokeExceptions(MethodReference target, IClassHierarchy cha)	determine the set of possible exception types a call to target may throw
SSAInstructionFactory	instructionFactory()
boolean	isBooleanType(TypeReference type)
boolean	isCharType(TypeReference type)
boolean	isDoubleType(TypeReference type)
boolean	isFloatType(TypeReference type)
boolean	isIntType(TypeReference type)
boolean	isLongType(TypeReference type)
boolean	isMetadataType(TypeReference type)	Is t a "metadata" type for the language, i.e., a type describing some other type (e.g., java.lang.Class for Java)?
boolean	isNullType(TypeReference type)	Is t the type of the language's null value? Should return true if t == null (?).
boolean	isStringType(TypeReference type)
boolean	isVoidType(TypeReference type)
TypeName	lookupPrimitiveType(String name)	Given a source-level primitive type name, get the corresponding "low-level" type name, e.g., the corresponding character to use in a Java method descriptor
<T extends InstanceKey> ModRef.ModVisitor<T,? extends ExtendedHeapModel>	makeModVisitor(CGNode n, Collection<PointerKey> result, PointerAnalysis<T> pa, ExtendedHeapModel h, boolean ignoreAllocHeapDefs)
<T extends InstanceKey> ModRef.RefVisitor<T,? extends ExtendedHeapModel>	makeRefVisitor(CGNode n, Collection<PointerKey> result, PointerAnalysis<T> pa, ExtendedHeapModel h)
boolean	methodsHaveDeclaredParameterTypes()	do MethodReference objects have declared parameter types?

Methods inherited from class com.ibm.wala.classLoader.LanguageImpl

equals, getBaseLanguage, getDerivedLanguages, hashCode, makeInducedCFG, modelConstant, registerDerivedLanguage, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.ibm.wala.classLoader.Language

getBaseLanguage, getDerivedLanguages, makeInducedCFG, modelConstant, registerDerivedLanguage

Constructor Details

JavaLanguage

public JavaLanguage()

Method Details

getAaStoreExceptions

public static Collection<TypeReference> getAaStoreExceptions()

getArithmeticException

public static Collection<TypeReference> getArithmeticException()

getArrayAccessExceptions

public static Collection<TypeReference> getArrayAccessExceptions()

getClassCastException

public static Collection<TypeReference> getClassCastException()

getClassNotFoundException

public static Collection<TypeReference> getClassNotFoundException()

getNewArrayExceptions

public static Collection<TypeReference> getNewArrayExceptions()

getNewSafeArrayExceptions

public static Collection<TypeReference> getNewSafeArrayExceptions()

getNewScalarExceptions

public static Collection<TypeReference> getNewScalarExceptions()

getNullPointerException

public static Collection<TypeReference> getNullPointerException()

getExceptionInInitializerError

public static Collection<TypeReference> getExceptionInInitializerError()

getName

public Atom getName()

Description copied from interface: Language

What is the name of the language?

Specified by:

getName in interface Language

getRootType

public TypeReference getRootType()

Description copied from interface: Language

What is the root type in a type hierarchy for this language? e.g. java.lang.Object in Java.

Specified by:

getRootType in interface Language

getThrowableType

public TypeReference getThrowableType()

Description copied from interface: Language

What is the root type of exceptions in this language? e.g. java.lang.Throwable in Java

Specified by:

getThrowableType in interface Language

getConstantType

public TypeReference getConstantType(Object o)

Description copied from interface: Language

Given a Java constant o, return the appropriate language type to associate with the constant. Possible types for o can be language dependent, but typically include Boolean, String, Integer, Float, etc.

Specified by:

getConstantType in interface Language

isNullType

public boolean isNullType(TypeReference type)

Description copied from interface: Language

Is t the type of the language's null value? Should return true if t == null (?).

Specified by:

isNullType in interface Language

getArrayInterfaces

public TypeReference[] getArrayInterfaces()

Description copied from interface: Language

get the interfaces implemented by all arrays in the language

Specified by:

getArrayInterfaces in interface Language

lookupPrimitiveType

public TypeName lookupPrimitiveType(String name)

Description copied from interface: Language

Given a source-level primitive type name, get the corresponding "low-level" type name, e.g., the corresponding character to use in a Java method descriptor

Specified by:

lookupPrimitiveType in interface Language

inferInvokeExceptions

public Collection<TypeReference> inferInvokeExceptions(MethodReference target,
 IClassHierarchy cha)
                                                throws InvalidClassFileException

Description copied from interface: Language

determine the set of possible exception types a call to target may throw

Specified by:

inferInvokeExceptions in interface Language

Returns:

Collection<TypeReference>, set of exception types a call to a declared target might throw.

Throws:

IllegalArgumentException - if target is null

IllegalArgumentException - if cha is null

InvalidClassFileException

getImplicitExceptionTypes

public Collection<TypeReference> getImplicitExceptionTypes(IInstruction pei)

Specified by:

getImplicitExceptionTypes in interface BytecodeLanguage

Parameters:

pei - a potentially-excepting instruction

Returns:

the exception types that pei may throw, independent of the class hierarchy. null if none.

Notes

• this method will NOT return the exception type explicitly thrown by an athrow
• this method will NOT return the exception types that a called method may throw
• this method ignores OutOfMemoryError
• this method ignores linkage errors
• this method ignores IllegalMonitorState exceptions

Throws:

IllegalArgumentException - if pei is null

instructionFactory

public SSAInstructionFactory instructionFactory()

Specified by:

instructionFactory in interface Language

isDoubleType

public boolean isDoubleType(TypeReference type)

Specified by:

isDoubleType in interface Language

isFloatType

public boolean isFloatType(TypeReference type)

Specified by:

isFloatType in interface Language

isIntType

public boolean isIntType(TypeReference type)

Specified by:

isIntType in interface Language

isLongType

public boolean isLongType(TypeReference type)

Specified by:

isLongType in interface Language

isVoidType

public boolean isVoidType(TypeReference type)

Specified by:

isVoidType in interface Language

isMetadataType

public boolean isMetadataType(TypeReference type)

Description copied from interface: Language

Is t a "metadata" type for the language, i.e., a type describing some other type (e.g., java.lang.Class for Java)?

Specified by:

isMetadataType in interface Language

isStringType

public boolean isStringType(TypeReference type)

Specified by:

isStringType in interface Language

isBooleanType

public boolean isBooleanType(TypeReference type)

Specified by:

isBooleanType in interface Language

isCharType

public boolean isCharType(TypeReference type)

Specified by:

isCharType in interface Language

getMetadataToken

public Object getMetadataToken(Object value)

Description copied from interface: Language

Get the representation of the meta-data corresponding to value. For example, in Java, if value represents some type, the returned object should be the corresponding TypeReference. The returned object should be appropriate for use as the token in an SSALoadMetadataInstruction for the language

Specified by:

getMetadataToken in interface Language

getPointerType

public TypeReference getPointerType(TypeReference pointee)
                             throws UnsupportedOperationException

Specified by:

getPointerType in interface Language

Throws:

UnsupportedOperationException

getStringType

public TypeReference getStringType()

Specified by:

getStringType in interface Language

getPrimitive

public PrimitiveType getPrimitive(TypeReference reference)

Description copied from interface: Language

get the abstraction of a primitive type to be used for type inference

Specified by:

getPrimitive in interface Language

See Also:

• TypeInference

getInvokeMethodReference

public MethodReference getInvokeMethodReference(ClassLoaderReference loader,
 IInvokeInstruction instruction)

Specified by:

getInvokeMethodReference in interface BytecodeLanguage

methodsHaveDeclaredParameterTypes

public boolean methodsHaveDeclaredParameterTypes()

Description copied from interface: Language

do MethodReference objects have declared parameter types?

Specified by:

methodsHaveDeclaredParameterTypes in interface Language

getFakeRootMethod

public AbstractRootMethod getFakeRootMethod(IClassHierarchy cha,
 AnalysisOptions options,
 IAnalysisCacheView cache)

Specified by:

getFakeRootMethod in interface Language

makeRefVisitor

public <T extends InstanceKey>
ModRef.RefVisitor<T,? extends ExtendedHeapModel> makeRefVisitor(CGNode n,
 Collection<PointerKey> result,
 PointerAnalysis<T> pa,
 ExtendedHeapModel h)

Specified by:

makeRefVisitor in interface Language

makeModVisitor

public <T extends InstanceKey>
ModRef.ModVisitor<T,? extends ExtendedHeapModel> makeModVisitor(CGNode n,
 Collection<PointerKey> result,
 PointerAnalysis<T> pa,
 ExtendedHeapModel h,
 boolean ignoreAllocHeapDefs)

Specified by:

makeModVisitor in interface Language