void ClassLoaderData::dump(outputStream * const out) {
ResourceMark rm;
out->print("ClassLoaderData CLD: "PTR_FORMAT", loader: "PTR_FORMAT", loader_klass: "PTR_FORMAT" %s {",
p2i(this), p2i((void *)class_loader()),
p2i(class_loader() != NULL ? class_loader()->klass() : NULL), loader_name());
if (claimed()) out->print(" claimed ");
if (is_unloading()) out->print(" unloading ");
out->print(" handles " INTPTR_FORMAT, p2i(handles()));
out->cr();
if (metaspace_or_null() != NULL) {
out->print_cr("metaspace: " INTPTR_FORMAT, p2i(metaspace_or_null()));
metaspace_or_null()->dump(out);
} else {
out->print_cr("metaspace: NULL");
}
#ifdef CLD_DUMP_KLASSES
if (Verbose) {
ResourceMark rm;
Klass* k = _klasses;
while (k != NULL) {
out->print_cr("klass "PTR_FORMAT", %s, CT: %d, MUT: %d", k, k->name()->as_C_string(),
k->has_modified_oops(), k->has_accumulated_modified_oops());
assert(k != k->next_link(), "no loops!");
k = k->next_link();
}
}
#endif // CLD_DUMP_KLASSES
#undef CLD_DUMP_KLASSES
if (_jmethod_ids != NULL) {
Method::print_jmethod_ids(this, out);
}
out->print_cr("}");
}
void ClassLoaderData::print_value_on(outputStream* out) const {
if (class_loader() == NULL) {
out->print("NULL class_loader");
} else {
out->print("class loader " INTPTR_FORMAT, p2i(this));
class_loader()->print_value_on(out);
}
}
bool ClassLoaderData::is_alive(BoolObjectClosure* is_alive_closure) const {
bool alive =
is_anonymous() ?
is_alive_closure->do_object_b(_klasses->java_mirror()) :
class_loader() == NULL || is_alive_closure->do_object_b(class_loader());
assert(!alive || claimed(), "must be claimed");
return alive;
}
static ClassFileStream* prologue(ClassFileStream* stream,
Symbol* name,
ClassLoaderData* loader_data,
Handle protection_domain,
JvmtiCachedClassFileData** cached_class_file,
TRAPS) {
assert(stream != NULL, "invariant");
if (JvmtiExport::should_post_class_file_load_hook()) {
assert(THREAD->is_Java_thread(), "must be a JavaThread");
const JavaThread* jt = (JavaThread*)THREAD;
Handle class_loader(THREAD, loader_data->class_loader());
// Get the cached class file bytes (if any) from the class that
// is being redefined or retransformed. We use jvmti_thread_state()
// instead of JvmtiThreadState::state_for(jt) so we don't allocate
// a JvmtiThreadState any earlier than necessary. This will help
// avoid the bug described by 7126851.
JvmtiThreadState* state = jt->jvmti_thread_state();
if (state != NULL) {
KlassHandle* h_class_being_redefined =
state->get_class_being_redefined();
if (h_class_being_redefined != NULL) {
instanceKlassHandle ikh_class_being_redefined =
instanceKlassHandle(THREAD, (*h_class_being_redefined)());
*cached_class_file = ikh_class_being_redefined->get_cached_class_file();
}
}
unsigned char* ptr = const_cast<unsigned char*>(stream->buffer());
unsigned char* end_ptr = ptr + stream->length();
JvmtiExport::post_class_file_load_hook(name,
class_loader,
protection_domain,
&ptr,
&end_ptr,
cached_class_file);
if (ptr != stream->buffer()) {
// JVMTI agent has modified class file data.
// Set new class file stream using JVMTI agent modified class file data.
stream = new ClassFileStream(ptr,
end_ptr - ptr,
stream->source(),
stream->need_verify());
}
}
return stream;
}
Metaspace* ClassLoaderData::metaspace_non_null() {
assert(!DumpSharedSpaces, "wrong metaspace!");
// If the metaspace has not been allocated, create a new one. Might want
// to create smaller arena for Reflection class loaders also.
// The reason for the delayed allocation is because some class loaders are
// simply for delegating with no metadata of their own.
if (_metaspace == NULL) {
MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag);
// Check again if metaspace has been allocated while we were getting this lock.
if (_metaspace != NULL) {
return _metaspace;
}
if (this == the_null_class_loader_data()) {
assert (class_loader() == NULL, "Must be");
set_metaspace(new Metaspace(_metaspace_lock, Metaspace::BootMetaspaceType));
} else if (is_anonymous()) {
if (TraceClassLoaderData && Verbose && class_loader() != NULL) {
tty->print_cr("is_anonymous: %s", class_loader()->klass()->internal_name());
}
set_metaspace(new Metaspace(_metaspace_lock, Metaspace::AnonymousMetaspaceType));
} else if (class_loader()->is_a(SystemDictionary::reflect_DelegatingClassLoader_klass())) {
if (TraceClassLoaderData && Verbose && class_loader() != NULL) {
tty->print_cr("is_reflection: %s", class_loader()->klass()->internal_name());
}
set_metaspace(new Metaspace(_metaspace_lock, Metaspace::ReflectionMetaspaceType));
} else {
set_metaspace(new Metaspace(_metaspace_lock, Metaspace::StandardMetaspaceType));
}
}
return _metaspace;
}
void ClassLoaderData::verify() {
oop cl = class_loader();
guarantee(this == class_loader_data(cl) || is_anonymous(), "Must be the same");
guarantee(cl != NULL || this == ClassLoaderData::the_null_class_loader_data() || is_anonymous(), "must be");
// Verify the integrity of the allocated space.
if (metaspace_or_null() != NULL) {
metaspace_or_null()->verify();
}
for (Klass* k = _klasses; k != NULL; k = k->next_link()) {
guarantee(k->class_loader_data() == this, "Must be the same");
k->verify();
assert(k != k->next_link(), "no loops!");
}
}
void ClassLoaderData::unload() {
_unloading = true;
// Tell serviceability tools these classes are unloading
classes_do(InstanceKlass::notify_unload_class);
if (TraceClassLoaderData) {
ResourceMark rm;
tty->print("[ClassLoaderData: unload loader data " INTPTR_FORMAT, p2i(this));
tty->print(" for instance " INTPTR_FORMAT " of %s", p2i((void *)class_loader()),
loader_name());
if (is_anonymous()) {
tty->print(" for anonymous class " INTPTR_FORMAT " ", p2i(_klasses));
}
tty->print_cr("]");
}
}
PlaceholderEntry* PlaceholderTable::get_entry(int index, unsigned int hash,
symbolHandle class_name,
Handle class_loader) {
assert_locked_or_safepoint(SystemDictionary_lock);
symbolOop class_name_ = class_name();
oop class_loader_ = class_loader();
for (PlaceholderEntry *place_probe = bucket(index);
place_probe != NULL;
place_probe = place_probe->next()) {
if (place_probe->hash() == hash &&
place_probe->equals(class_name_, class_loader_)) {
return place_probe;
}
}
return NULL;
}
const char* ClassLoaderData::loader_name() {
// Handles null class loader
return SystemDictionary::loader_name(class_loader());
}
/**
* Returns true if this class loader data is for the extension class loader.
*/
bool ClassLoaderData::is_ext_class_loader_data() const {
return SystemDictionary::is_ext_class_loader(class_loader());
}
oop ClassLoaderData::keep_alive_object() const {
assert(!keep_alive(), "Don't use with CLDs that are artificially kept alive");
return is_anonymous() ? _klasses->java_mirror() : class_loader();
}