8309956: Shenandoah: Strengthen the mark word check in string dedup
Reviewed-by: wkemper, zgu, ysr
This commit is contained in:
parent
955fc2faba
commit
57b8251241
@ -45,14 +45,15 @@ bool ShenandoahStringDedup::is_candidate(oop obj) {
|
||||
return false;
|
||||
}
|
||||
|
||||
if (StringDedup::is_below_threshold_age(obj->age())) {
|
||||
const markWord mark = obj->mark();
|
||||
// Having/had displaced header, too risk to deal with them, skip
|
||||
if (mark == markWord::INFLATING() || mark.has_displaced_mark_helper()) {
|
||||
return false;
|
||||
}
|
||||
const markWord mark = obj->mark();
|
||||
|
||||
// Increase string age and enqueue it when it rearches age threshold
|
||||
// Having/had displaced header, too risky to deal with them, skip
|
||||
if (mark == markWord::INFLATING() || mark.has_displaced_mark_helper()) {
|
||||
return false;
|
||||
}
|
||||
|
||||
if (StringDedup::is_below_threshold_age(mark.age())) {
|
||||
// Increase string age and enqueue it when it reaches age threshold
|
||||
markWord new_mark = mark.incr_age();
|
||||
if (mark == obj->cas_set_mark(new_mark, mark)) {
|
||||
return StringDedup::is_threshold_age(new_mark.age()) &&
|
||||
|
Loading…
x
Reference in New Issue
Block a user