extern "C" void* j3ResolveStaticStub() {
JavaThread *th = JavaThread::get();
void* result = NULL;
// Lookup the caller of this class.
vmkit::StackWalker Walker(th);
++Walker; // Remove the stub.
vmkit::FrameInfo* FI = Walker.get();
assert(FI->Metadata != NULL && "Wrong stack trace");
JavaMethod* caller = (JavaMethod*)FI->Metadata;
// Lookup the method info in the constant pool of the caller.
uint16 ctpIndex = caller->lookupCtpIndex(FI);
assert(ctpIndex && "No constant pool index");
JavaConstantPool* ctpInfo = caller->classDef->getConstantPool();
CommonClass* cl = 0;
const UTF8* utf8 = 0;
Signdef* sign = 0;
ctpInfo->resolveMethod(ctpIndex, cl, utf8, sign);
UserClass* lookup = cl->isArray() ? cl->super : cl->asClass();
assert(lookup->isInitializing() && "Class not ready");
JavaMethod* callee = lookup->lookupMethod(utf8, sign->keyName, true, true, 0);
// Compile the found method.
result = callee->compiledPtr();
// Update the entry in the constant pool.
ctpInfo->ctpRes[ctpIndex] = result;
return result;
}
extern "C" void* j3ResolveVirtualStub(JavaObject* obj) {
llvm_gcroot(obj, 0);
JavaThread *th = JavaThread::get();
UserCommonClass* cl = JavaObject::getClass(obj);
void* result = NULL;
// Lookup the caller of this class.
vmkit::StackWalker Walker(th);
++Walker; // Remove the stub.
vmkit::FrameInfo* FI = Walker.get();
assert(FI->Metadata != NULL && "Wrong stack trace");
JavaMethod* meth = (JavaMethod*)FI->Metadata;
// Lookup the method info in the constant pool of the caller.
uint16 ctpIndex = meth->lookupCtpIndex(FI);
assert(ctpIndex && "No constant pool index");
JavaConstantPool* ctpInfo = meth->classDef->getConstantPool();
CommonClass* ctpCl = 0;
const UTF8* utf8 = 0;
Signdef* sign = 0;
JavaMethod* origMeth = 0;
ctpInfo->infoOfMethod(ctpIndex, ACC_VIRTUAL, ctpCl, origMeth);
ctpInfo->resolveMethod(ctpIndex, ctpCl, utf8, sign);
assert(cl->isSubclassOf(ctpCl) && "Wrong call object");
UserClass* lookup = cl->isArray() ? cl->super : cl->asClass();
JavaMethod* Virt = lookup->lookupMethod(utf8, sign->keyName, false, true, 0);
if (isAbstract(Virt->access)) {
JavaThread::get()->getJVM()->abstractMethodError(Virt->classDef, Virt->name);
}
// Compile the found method.
result = Virt->compiledPtr(lookup);
// Update the virtual table.
assert(lookup->isResolved() && "Class not resolved");
assert(lookup->isInitializing() && "Class not ready");
assert(lookup->virtualVT && "Class has no VT");
assert(lookup->virtualTableSize > Virt->offset &&
"The method's offset is greater than the virtual table size");
((void**)obj->getVirtualTable())[Virt->offset] = result;
if (isInterface(origMeth->classDef->access)) {
InterfaceMethodTable* IMT = cl->virtualVT->IMT;
uint32_t index = InterfaceMethodTable::getIndex(Virt->name, Virt->type);
if ((IMT->contents[index] & 1) == 0) {
IMT->contents[index] = (word_t)result;
} else {
JavaMethod* Imeth =
ctpCl->asClass()->lookupInterfaceMethodDontThrow(utf8, sign->keyName);
assert(Imeth && "Method not in hierarchy?");
word_t* table = (word_t*)(IMT->contents[index] & ~1);
uint32 i = 0;
while (table[i] != (word_t)Imeth) { i += 2; }
table[i + 1] = (word_t)result;
}
}
return result;
}