soot.jimple.toolkits.pointer.nativemethods
Class JavaLangStringNative
java.lang.Object
soot.jimple.toolkits.pointer.nativemethods.NativeMethodClass
soot.jimple.toolkits.pointer.nativemethods.JavaLangStringNative
public class JavaLangStringNative
- extends NativeMethodClass
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
JavaLangStringNative
public JavaLangStringNative(NativeHelper helper)
simulateMethod
public void simulateMethod(SootMethod method,
ReferenceVariable thisVar,
ReferenceVariable returnVar,
ReferenceVariable[] params)
- Implements the abstract method simulateMethod.
It distributes the request to the corresponding methods
by signatures.
- Specified by:
simulateMethod in class NativeMethodClass
java_lang_String_intern
public void java_lang_String_intern(SootMethod method,
ReferenceVariable thisVar,
ReferenceVariable returnVar,
ReferenceVariable[] params)
- Returns a canonical representation for the string object. A pool
of strings, initially empty, is maintained privately by the class
String.
When the intern method is invoked, if the pool already contains a
* string equal to this String object as determined by the *
equals(Object) method, then the string from the pool is *
returned. Otherwise, this String object is added to the pool and
a * reference to this String object is returned.
It follows that for any two strings s and t,
s.intern() == t.intern()
is true if and only if s.equals(t) is true.
All literal strings and string-valued constant expressions are *
interned. String literals are defined in Section 3.10.5 of the Java *
Language Specification Returns: a string that has the same
contents * as this string, but is guaranteed to be from a pool of
unique * strings.
Side Effect: from the description, we can see, it is tricky to
know the side effect of this native method.
Take a conservative way to handle this.
It may be @return = this;
pool = this;
why should we care about String in points-to analysis?
public native java.lang.String intern();