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8202081: Introduce CollectedHeap::is_oop()

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Reviewed-by: eosterlund, rkennke
This commit is contained in:
Stefan Karlsson 2018-04-23 11:25:53 +02:00
parent 0bf983846e
commit 04e986f200
3 changed files with 21 additions and 4 deletions
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7
src/hotspot/share/oops/oop.cpp
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@ -122,10 +122,9 @@ unsigned int oopDesc::new_hash(juint seed) {
// used only for asserts and guarantees
bool oopDesc::is_oop(oop obj, bool ignore_mark_word) {
if (!check_obj_alignment(obj)) return false;
if (!Universe::heap()->is_in_reserved(obj)) return false;
// obj is aligned and accessible in heap
if (Universe::heap()->is_in_reserved(obj->klass_or_null())) return false;
if (!Universe::heap()->is_oop(obj)) {
return false;
}
// Header verification: the mark is typically non-NULL. If we're
// at a safepoint, it must not be null.