// ------------------------------------------------------------------
// ciInstanceKlass::ciInstanceKlass
//
// Loaded instance klass.
ciInstanceKlass::ciInstanceKlass(KlassHandle h_k) :
ciKlass(h_k)
{
assert(get_Klass()->oop_is_instance(), "wrong type");
assert(get_instanceKlass()->is_loaded(), "must be at least loaded");
InstanceKlass* ik = get_instanceKlass();
AccessFlags access_flags = ik->access_flags();
_flags = ciFlags(access_flags);
_has_finalizer = access_flags.has_finalizer();
_has_subklass = ik->subklass() != NULL;
_init_state = ik->init_state();
_nonstatic_field_size = ik->nonstatic_field_size();
_has_nonstatic_fields = ik->has_nonstatic_fields();
_has_default_methods = ik->has_default_methods();
_nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
_has_injected_fields = -1;
_implementor = NULL; // we will fill these lazily
Thread *thread = Thread::current();
if (ciObjectFactory::is_initialized()) {
_loader = JNIHandles::make_local(thread, ik->class_loader());
_protection_domain = JNIHandles::make_local(thread,
ik->protection_domain());
_is_shared = false;
} else {
Handle h_loader(thread, ik->class_loader());
Handle h_protection_domain(thread, ik->protection_domain());
_loader = JNIHandles::make_global(h_loader);
_protection_domain = JNIHandles::make_global(h_protection_domain);
_is_shared = true;
}
// Lazy fields get filled in only upon request.
_super = NULL;
_java_mirror = NULL;
if (is_shared()) {
if (h_k() != SystemDictionary::Object_klass()) {
super();
}
//compute_nonstatic_fields(); // done outside of constructor
}
_field_cache = NULL;
}
// ------------------------------------------------------------------
// ciInstanceKlass::ciInstanceKlass
//
// Loaded instance klass.
ciInstanceKlass::ciInstanceKlass(KlassHandle h_k) : ciKlass(h_k) {
assert(get_Klass()->oop_is_instance(), "wrong type");
instanceKlass* ik = get_instanceKlass();
AccessFlags access_flags = ik->access_flags();
_flags = ciFlags(access_flags);
_has_finalizer = access_flags.has_finalizer();
_has_subklass = ik->subklass() != NULL;
_is_initialized = ik->is_initialized();
_is_being_initialized = ik->is_being_initialized();
_size_helper = ik->size_helper();
_nonstatic_field_size = ik->nonstatic_field_size();
_checked_implementor = false;
_implementor = NULL;
Thread *thread = Thread::current();
if (ciObjectFactory::shared_is_initialized()) {
_loader = JNIHandles::make_local(thread, ik->class_loader());
_protection_domain = JNIHandles::make_local(thread,
ik->protection_domain());
_is_shared = false;
} else {
Handle h_loader(thread, ik->class_loader());
Handle h_protection_domain(thread, ik->protection_domain());
_loader = JNIHandles::make_global(h_loader, false);
_protection_domain = JNIHandles::make_global(h_protection_domain, false);
_is_shared = true;
}
// Lazy fields get filled in only upon request.
_super = NULL;
_java_mirror = NULL;
if (_is_shared) {
if (h_k() != SystemDictionary::object_klass()) {
super();
}
java_mirror();
}
_field_cache = NULL;
}
// ------------------------------------------------------------------
// ciMethod::ciMethod
//
// Loaded method.
ciMethod::ciMethod(methodHandle h_m) : ciMetadata(h_m()) {
assert(h_m() != NULL, "no null method");
// These fields are always filled in in loaded methods.
_flags = ciFlags(h_m()->access_flags());
// Easy to compute, so fill them in now.
_max_stack = h_m()->max_stack();
_max_locals = h_m()->max_locals();
_code_size = h_m()->code_size();
_intrinsic_id = h_m()->intrinsic_id();
_handler_count = h_m()->exception_table_length();
_uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
_balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
_is_c1_compilable = !h_m()->is_not_c1_compilable();
_is_c2_compilable = !h_m()->is_not_c2_compilable();
// Lazy fields, filled in on demand. Require allocation.
_code = NULL;
_exception_handlers = NULL;
_liveness = NULL;
_method_blocks = NULL;
#if defined(COMPILER2) || defined(SHARK)
_flow = NULL;
_bcea = NULL;
#endif // COMPILER2 || SHARK
ciEnv *env = CURRENT_ENV;
if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) {
// 6328518 check hotswap conditions under the right lock.
MutexLocker locker(Compile_lock);
if (Dependencies::check_evol_method(h_m()) != NULL) {
_is_c1_compilable = false;
_is_c2_compilable = false;
}
} else {
CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
}
if (h_m()->method_holder()->is_linked()) {
_can_be_statically_bound = h_m()->can_be_statically_bound();
} else {
// Have to use a conservative value in this case.
_can_be_statically_bound = false;
}
// Adjust the definition of this condition to be more useful:
// %%% take these conditions into account in vtable generation
if (!_can_be_statically_bound && h_m()->is_private())
_can_be_statically_bound = true;
if (_can_be_statically_bound && h_m()->is_abstract())
_can_be_statically_bound = false;
// generating _signature may allow GC and therefore move m.
// These fields are always filled in.
_name = env->get_symbol(h_m()->name());
_holder = env->get_instance_klass(h_m()->method_holder());
ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
constantPoolHandle cpool = h_m()->constants();
_signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
_method_data = NULL;
// Take a snapshot of these values, so they will be commensurate with the MDO.
if (ProfileInterpreter || TieredCompilation) {
int invcnt = h_m()->interpreter_invocation_count();
// if the value overflowed report it as max int
_interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
_interpreter_throwout_count = h_m()->interpreter_throwout_count();
} else {
_interpreter_invocation_count = 0;
_interpreter_throwout_count = 0;
}
if (_interpreter_invocation_count == 0)
_interpreter_invocation_count = 1;
_instructions_size = -1;
#ifdef ASSERT
if (ReplayCompiles) {
ciReplay::initialize(this);
}
#endif
}
void ciField::initialize_from(fieldDescriptor* fd) {
// Get the flags, offset, and canonical holder of the field.
_flags = ciFlags(fd->access_flags());
_offset = fd->offset();
_holder = CURRENT_ENV->get_object(fd->field_holder())->as_instance_klass();
// Check to see if the field is constant.
if (_holder->is_initialized() && this->is_final()) {
if (!this->is_static()) {
// A field can be constant if it's a final static field or if it's
// a final non-static field of a trusted class ({java,sun}.dyn).
if (trust_final_non_static_fields(_holder)) {
_is_constant = true;
return;
}
_is_constant = false;
return;
}
// This field just may be constant. The only cases where it will
// not be constant are:
//
// 1. The field holds a non-perm-space oop. The field is, strictly
// speaking, constant but we cannot embed non-perm-space oops into
// generated code. For the time being we need to consider the
// field to be not constant.
// 2. The field is a *special* static&final field whose value
// may change. The three examples are java.lang.System.in,
// java.lang.System.out, and java.lang.System.err.
klassOop k = _holder->get_klassOop();
assert( SystemDictionary::System_klass() != NULL, "Check once per vm");
if( k == SystemDictionary::System_klass() ) {
// Check offsets for case 2: System.in, System.out, or System.err
if( _offset == java_lang_System::in_offset_in_bytes() ||
_offset == java_lang_System::out_offset_in_bytes() ||
_offset == java_lang_System::err_offset_in_bytes() ) {
_is_constant = false;
return;
}
}
_is_constant = true;
switch(type()->basic_type()) {
case T_BYTE:
_constant_value = ciConstant(type()->basic_type(), k->byte_field(_offset));
break;
case T_CHAR:
_constant_value = ciConstant(type()->basic_type(), k->char_field(_offset));
break;
case T_SHORT:
_constant_value = ciConstant(type()->basic_type(), k->short_field(_offset));
break;
case T_BOOLEAN:
_constant_value = ciConstant(type()->basic_type(), k->bool_field(_offset));
break;
case T_INT:
_constant_value = ciConstant(type()->basic_type(), k->int_field(_offset));
break;
case T_FLOAT:
_constant_value = ciConstant(k->float_field(_offset));
break;
case T_DOUBLE:
_constant_value = ciConstant(k->double_field(_offset));
break;
case T_LONG:
_constant_value = ciConstant(k->long_field(_offset));
break;
case T_OBJECT:
case T_ARRAY:
{
oop o = k->obj_field(_offset);
// A field will be "constant" if it is known always to be
// a non-null reference to an instance of a particular class,
// or to a particular array. This can happen even if the instance
// or array is not perm. In such a case, an "unloaded" ciArray
// or ciInstance is created. The compiler may be able to use
// information about the object's class (which is exact) or length.
if (o == NULL) {
_constant_value = ciConstant(type()->basic_type(), ciNullObject::make());
} else {
_constant_value = ciConstant(type()->basic_type(), CURRENT_ENV->get_object(o));
assert(_constant_value.as_object() == CURRENT_ENV->get_object(o), "check interning");
}
}
}
} else {
_is_constant = false;
}
}