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8244733: Add ResourceHashtable::xxx_if_absent

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Reviewed-by: coleenp, iklam, rehn, dholmes
This commit is contained in:
Thomas Stuefe 2020-05-20 15:56:39 +02:00
parent ac93f38b16
commit 66514251c1
7 changed files with 127 additions and 56 deletions
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23
src/hotspot/share/classfile/systemDictionaryShared.cpp
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@ -198,14 +198,14 @@ class DumpTimeSharedClassTable: public ResourceHashtable<
int _unregistered_count;
public:
DumpTimeSharedClassInfo* find_or_allocate_info_for(InstanceKlass* k) {
DumpTimeSharedClassInfo* p = get(k);
if (p == NULL) {
bool created = false;
DumpTimeSharedClassInfo* p = put_if_absent(k, &created);
if (created) {
assert(!SystemDictionaryShared::no_class_loading_should_happen(),
"no new classes can be loaded while dumping archive");
put(k, DumpTimeSharedClassInfo());
p = get(k);
assert(p != NULL, "sanity");
p->_klass = k;
} else {
assert(p->_klass == k, "Sanity");
}
return p;
}
@ -1041,19 +1041,16 @@ static ResourceHashtable<
ResourceObj::C_HEAP> _loaded_unregistered_classes;
bool SystemDictionaryShared::add_unregistered_class(InstanceKlass* k, TRAPS) {
// We don't allow duplicated unregistered classes of the same name.
assert(DumpSharedSpaces, "only when dumping");
Symbol* name = k->name();
if (_loaded_unregistered_classes.get(name) != NULL) {
// We don't allow duplicated unregistered classes of the same name.
return false;
} else {
bool isnew = _loaded_unregistered_classes.put(name, true);
assert(isnew, "sanity");
bool created = false;
_loaded_unregistered_classes.put_if_absent(name, true, &created);
if (created) {
MutexLocker mu_r(THREAD, Compile_lock); // add_to_hierarchy asserts this.
SystemDictionary::add_to_hierarchy(k, CHECK_false);
return true;
}
return created;
}
// This function is called to resolve the super/interfaces of shared classes for