/*
* We have a method pointer for a method in "clazz", but it might be
* pointing to a method in a derived class. We want to find the actual entry
* from the class' vtable. If "clazz" is an interface, we have to do a
* little more digging.
*
* (This is used for reflection and JNI "call method" calls.)
*/
const Method* dvmGetVirtualizedMethod(const ClassObject* clazz,
const Method* meth)
{
Method* actualMeth;
int methodIndex;
assert(!dvmIsStaticMethod(meth));
if (dvmIsPrivateMethod(meth)) // no vtable entry for these
return meth;
/*
* If the method was declared in an interface, we need to scan through
* the class' list of interfaces for it, and find the vtable index
* from that.
*
* TODO: use the interface cache.
*/
if (dvmIsInterfaceClass(meth->clazz)) {
int i;
for (i = 0; i < clazz->iftableCount; i++) {
if (clazz->iftable[i].clazz == meth->clazz)
break;
}
if (i == clazz->iftableCount) {
dvmThrowException("Ljava/lang/IncompatibleClassChangeError;",
"invoking method from interface not implemented by class");
return NULL;
}
methodIndex = clazz->iftable[i].methodIndexArray[meth->methodIndex];
} else {
methodIndex = meth->methodIndex;
}
assert(methodIndex >= 0 && methodIndex < clazz->vtableCount);
actualMeth = clazz->vtable[methodIndex];
/*
* Make sure there's code to execute.
*/
if (dvmIsAbstractMethod(actualMeth)) {
dvmThrowException("Ljava/lang/AbstractMethodError;", NULL);
return NULL;
}
assert(!dvmIsMirandaMethod(actualMeth));
return actualMeth;
}
/* Dalvik puts private, static, and constructors into non-virtual table */
INLINE bool dvmIsDirectMethod(const Method* method) {
return dvmIsPrivateMethod(method) ||
dvmIsStaticMethod(method) ||
dvmIsConstructorMethod(method);
}
