//------------------------------------------------------------------
// ciObjectFactory::get_unloaded_method
//
// Get the ciMethod representing an unloaded/unfound method.
//
// Implementation note: unloaded methods are currently stored in
// an unordered array, requiring a linear-time lookup for each
// unloaded method. This may need to change.
ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder,
ciSymbol* name,
ciSymbol* signature,
ciInstanceKlass* accessor) {
ciSignature* that = NULL;
for (int i = 0; i < _unloaded_methods->length(); i++) {
ciMethod* entry = _unloaded_methods->at(i);
if (entry->holder()->equals(holder) &&
entry->name()->equals(name) &&
entry->signature()->as_symbol()->equals(signature)) {
// Short-circuit slow resolve.
if (entry->signature()->accessing_klass() == accessor) {
// We've found a match.
return entry;
} else {
// Lazily create ciSignature
if (that == NULL) that = new (arena()) ciSignature(accessor, constantPoolHandle(), signature);
if (entry->signature()->equals(that)) {
// We've found a match.
return entry;
}
}
}
}
// This is a new unloaded method. Create it and stick it in
// the cache.
ciMethod* new_method = new (arena()) ciMethod(holder, name, signature, accessor);
init_ident_of(new_method);
_unloaded_methods->append(new_method);
return new_method;
}
//------------------------------------------------------------------
// ciObjectFactory::get_return_address
//
// Get a ciReturnAddress for a specified bci.
ciReturnAddress* ciObjectFactory::get_return_address(int bci) {
for (int i=0; i<_return_addresses->length(); i++) {
ciReturnAddress* entry = _return_addresses->at(i);
if (entry->bci() == bci) {
// We've found a match.
return entry;
}
}
ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci);
init_ident_of(new_ret_addr);
_return_addresses->append(new_ret_addr);
return new_ret_addr;
}
// ------------------------------------------------------------------
// ciObjectFactory::get_metadata
//
// Get the ciMetadata corresponding to some Metadata. If the ciMetadata has
// already been created, it is returned. Otherwise, a new ciMetadata
// is created.
ciMetadata* ciObjectFactory::get_metadata(Metadata* key) {
ASSERT_IN_VM;
#ifdef ASSERT
if (CIObjectFactoryVerify) {
Metadata* last = NULL;
for (int j = 0; j< _ci_metadata->length(); j++) {
Metadata* o = _ci_metadata->at(j)->constant_encoding();
assert(last < o, "out of order");
last = o;
}
}
#endif // ASSERT
int len = _ci_metadata->length();
int index = find(key, _ci_metadata);
#ifdef ASSERT
if (CIObjectFactoryVerify) {
for (int i=0; i<_ci_metadata->length(); i++) {
if (_ci_metadata->at(i)->constant_encoding() == key) {
assert(index == i, " bad lookup");
}
}
}
#endif
if (!is_found_at(index, key, _ci_metadata)) {
// The ciMetadata does not yet exist. Create it and insert it
// into the cache.
ciMetadata* new_object = create_new_metadata(key);
init_ident_of(new_object);
assert(new_object->is_metadata(), "must be");
if (len != _ci_metadata->length()) {
// creating the new object has recursively entered new objects
// into the table. We need to recompute our index.
index = find(key, _ci_metadata);
}
assert(!is_found_at(index, key, _ci_metadata), "no double insert");
insert(index, new_object, _ci_metadata);
return new_object;
}
return _ci_metadata->at(index)->as_metadata();
}
//------------------------------------------------------------------
// ciObjectFactory::get_unloaded_instance
//
// Get a ciInstance representing an as-yet undetermined instance of a given class.
//
ciInstance* ciObjectFactory::get_unloaded_instance(ciInstanceKlass* instance_klass) {
for (int i=0; i<_unloaded_instances->length(); i++) {
ciInstance* entry = _unloaded_instances->at(i);
if (entry->klass()->equals(instance_klass)) {
// We've found a match.
return entry;
}
}
// This is a new unloaded instance. Create it and stick it in
// the cache.
ciInstance* new_instance = new (arena()) ciInstance(instance_klass);
init_ident_of(new_instance);
_unloaded_instances->append(new_instance);
// make sure it looks the way we want:
assert(!new_instance->is_loaded(), "");
assert(new_instance->klass() == instance_klass, "");
return new_instance;
}
// ------------------------------------------------------------------
// ciObjectFactory::get
//
// Get the ciObject corresponding to some oop. If the ciObject has
// already been created, it is returned. Otherwise, a new ciObject
// is created.
ciObject* ciObjectFactory::get(oop key) {
ASSERT_IN_VM;
assert(Universe::heap()->is_in_reserved(key), "must be");
NonPermObject* &bucket = find_non_perm(key);
if (bucket != NULL) {
return bucket->object();
}
// The ciObject does not yet exist. Create it and insert it
// into the cache.
Handle keyHandle(key);
ciObject* new_object = create_new_object(keyHandle());
assert(keyHandle() == new_object->get_oop(), "must be properly recorded");
init_ident_of(new_object);
assert(Universe::heap()->is_in_reserved(new_object->get_oop()), "must be");
// Not a perm-space object.
insert_non_perm(bucket, keyHandle(), new_object);
return new_object;
}
//------------------------------------------------------------------
// ciObjectFactory::get_unloaded_method
//
// Get the ciMethod representing an unloaded/unfound method.
//
// Implementation note: unloaded methods are currently stored in
// an unordered array, requiring a linear-time lookup for each
// unloaded method. This may need to change.
ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder,
ciSymbol* name,
ciSymbol* signature) {
for (int i=0; i<_unloaded_methods->length(); i++) {
ciMethod* entry = _unloaded_methods->at(i);
if (entry->holder()->equals(holder) &&
entry->name()->equals(name) &&
entry->signature()->as_symbol()->equals(signature)) {
// We've found a match.
return entry;
}
}
// This is a new unloaded method. Create it and stick it in
// the cache.
ciMethod* new_method = new (arena()) ciMethod(holder, name, signature);
init_ident_of(new_method);
_unloaded_methods->append(new_method);
return new_method;
}
//------------------------------------------------------------------
// ciObjectFactory::get_empty_methodData
//
// Get the ciMethodData representing the methodData for a method with
// none.
ciMethodData* ciObjectFactory::get_empty_methodData() {
ciMethodData* new_methodData = new (arena()) ciMethodData();
init_ident_of(new_methodData);
return new_methodData;
}
//------------------------------------------------------------------
// ciObjectFactory::get_unloaded_klass
//
// Get a ciKlass representing an unloaded klass.
//
// Implementation note: unloaded klasses are currently stored in
// an unordered array, requiring a linear-time lookup for each
// unloaded klass. This may need to change.
ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass,
ciSymbol* name,
bool create_if_not_found) {
EXCEPTION_CONTEXT;
oop loader = NULL;
oop domain = NULL;
if (accessing_klass != NULL) {
loader = accessing_klass->loader();
domain = accessing_klass->protection_domain();
}
for (int i=0; i<_unloaded_klasses->length(); i++) {
ciKlass* entry = _unloaded_klasses->at(i);
if (entry->name()->equals(name) &&
entry->loader() == loader &&
entry->protection_domain() == domain) {
// We've found a match.
return entry;
}
}
if (!create_if_not_found)
return NULL;
// This is a new unloaded klass. Create it and stick it in
// the cache.
ciKlass* new_klass = NULL;
// Two cases: this is an unloaded ObjArrayKlass or an
// unloaded InstanceKlass. Deal with both.
if (name->byte_at(0) == '[') {
// Decompose the name.'
FieldArrayInfo fd;
BasicType element_type = FieldType::get_array_info(name->get_symbol(),
fd, THREAD);
if (HAS_PENDING_EXCEPTION) {
CLEAR_PENDING_EXCEPTION;
CURRENT_THREAD_ENV->record_out_of_memory_failure();
return ciEnv::_unloaded_ciobjarrayklass;
}
int dimension = fd.dimension();
assert(element_type != T_ARRAY, "unsuccessful decomposition");
ciKlass* element_klass = NULL;
if (element_type == T_OBJECT) {
ciEnv *env = CURRENT_THREAD_ENV;
ciSymbol* ci_name = env->get_symbol(fd.object_key());
element_klass =
env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass();
} else {
assert(dimension > 1, "one dimensional type arrays are always loaded.");
// The type array itself takes care of one of the dimensions.
dimension--;
// The element klass is a TypeArrayKlass.
element_klass = ciTypeArrayKlass::make(element_type);
}
new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension);
} else {
jobject loader_handle = NULL;
jobject domain_handle = NULL;
if (accessing_klass != NULL) {
loader_handle = accessing_klass->loader_handle();
domain_handle = accessing_klass->protection_domain_handle();
}
new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle);
}
init_ident_of(new_klass);
_unloaded_klasses->append(new_klass);
return new_klass;
}
void ciObjectFactory::init_shared_objects() {
_next_ident = 1; // start numbering CI objects at 1
{
// Create the shared symbols, but not in _shared_ci_metadata.
int i;
for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) {
Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i);
assert(vmSymbols::find_sid(vmsym) == i, "1-1 mapping");
ciSymbol* sym = new (_arena) ciSymbol(vmsym, (vmSymbols::SID) i);
init_ident_of(sym);
_shared_ci_symbols[i] = sym;
}
#ifdef ASSERT
for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) {
Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i);
ciSymbol* sym = vm_symbol_at((vmSymbols::SID) i);
assert(sym->get_symbol() == vmsym, "oop must match");
}
assert(ciSymbol::void_class_signature()->get_symbol() == vmSymbols::void_class_signature(), "spot check");
#endif
}
_ci_metadata = new (_arena) GrowableArray<ciMetadata*>(_arena, 64, 0, NULL);
for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) {
BasicType t = (BasicType)i;
if (type2name(t) != NULL && t != T_OBJECT && t != T_ARRAY && t != T_NARROWOOP && t != T_NARROWKLASS) {
ciType::_basic_types[t] = new (_arena) ciType(t);
init_ident_of(ciType::_basic_types[t]);
}
}
ciEnv::_null_object_instance = new (_arena) ciNullObject();
init_ident_of(ciEnv::_null_object_instance);
#define WK_KLASS_DEFN(name, ignore_s, opt) \
if (SystemDictionary::name() != NULL) \
ciEnv::_##name = get_metadata(SystemDictionary::name())->as_instance_klass();
WK_KLASSES_DO(WK_KLASS_DEFN)
#undef WK_KLASS_DEFN
for (int len = -1; len != _ci_metadata->length(); ) {
len = _ci_metadata->length();
for (int i2 = 0; i2 < len; i2++) {
ciMetadata* obj = _ci_metadata->at(i2);
assert (obj->is_metadata(), "what else would it be?");
if (obj->is_loaded() && obj->is_instance_klass()) {
obj->as_instance_klass()->compute_nonstatic_fields();
}
}
}
ciEnv::_unloaded_cisymbol = ciObjectFactory::get_symbol(vmSymbols::dummy_symbol());
// Create dummy InstanceKlass and ObjArrayKlass object and assign them idents
ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL);
init_ident_of(ciEnv::_unloaded_ciinstance_klass);
ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1);
init_ident_of(ciEnv::_unloaded_ciobjarrayklass);
assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking");
get_metadata(Universe::boolArrayKlassObj());
get_metadata(Universe::charArrayKlassObj());
get_metadata(Universe::singleArrayKlassObj());
get_metadata(Universe::doubleArrayKlassObj());
get_metadata(Universe::byteArrayKlassObj());
get_metadata(Universe::shortArrayKlassObj());
get_metadata(Universe::intArrayKlassObj());
get_metadata(Universe::longArrayKlassObj());
assert(_non_perm_count == 0, "no shared non-perm objects");
// The shared_ident_limit is the first ident number that will
// be used for non-shared objects. That is, numbers less than
// this limit are permanently assigned to shared CI objects,
// while the higher numbers are recycled afresh by each new ciEnv.
_shared_ident_limit = _next_ident;
_shared_ci_metadata = _ci_metadata;
}
// ------------------------------------------------------------------
// ciObjectFactory::get
//
// Get the ciObject corresponding to some oop. If the ciObject has
// already been created, it is returned. Otherwise, a new ciObject
// is created.
ciObject* ciObjectFactory::get(oop key) {
ASSERT_IN_VM;
#ifdef ASSERT
if (CIObjectFactoryVerify) {
oop last = NULL;
for (int j = 0; j< _ci_objects->length(); j++) {
oop o = _ci_objects->at(j)->get_oop();
assert(last < o, "out of order");
last = o;
}
}
#endif // ASSERT
int len = _ci_objects->length();
int index = find(key, _ci_objects);
#ifdef ASSERT
if (CIObjectFactoryVerify) {
for (int i=0; i<_ci_objects->length(); i++) {
if (_ci_objects->at(i)->get_oop() == key) {
assert(index == i, " bad lookup");
}
}
}
#endif
if (!is_found_at(index, key, _ci_objects)) {
// Check in the non-perm area before putting it in the list.
NonPermObject* &bucket = find_non_perm(key);
if (bucket != NULL) {
return bucket->object();
}
// Check in the shared symbol area before putting it in the list.
if (key->is_symbol()) {
vmSymbols::SID sid = vmSymbols::find_sid((symbolOop)key);
if (sid != vmSymbols::NO_SID) {
// do not pollute the main cache with it
return vm_symbol_at(sid);
}
}
// The ciObject does not yet exist. Create it and insert it
// into the cache.
Handle keyHandle(key);
ciObject* new_object = create_new_object(keyHandle());
assert(keyHandle() == new_object->get_oop(), "must be properly recorded");
init_ident_of(new_object);
if (!new_object->is_perm()) {
// Not a perm-space object.
insert_non_perm(bucket, keyHandle(), new_object);
return new_object;
}
if (len != _ci_objects->length()) {
// creating the new object has recursively entered new objects
// into the table. We need to recompute our index.
index = find(keyHandle(), _ci_objects);
}
assert(!is_found_at(index, keyHandle(), _ci_objects), "no double insert");
insert(index, new_object, _ci_objects);
return new_object;
}
return _ci_objects->at(index);
}
