void StealMarkingTask::do_it(GCTaskManager* manager, uint which) {
assert(Universe::heap()->is_gc_active(), "called outside gc");
NOT_PRODUCT(GCTraceTime tm("StealMarkingTask",
PrintGCDetails && TraceParallelOldGCTasks, true, NULL));
ParCompactionManager* cm =
ParCompactionManager::gc_thread_compaction_manager(which);
PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
oop obj = NULL;
ObjArrayTask task;
int random_seed = 17;
do {
while (ParCompactionManager::steal_objarray(which, &random_seed, task)) {
objArrayKlass* const k = (objArrayKlass*)task.obj()->blueprint();
k->oop_follow_contents(cm, task.obj(), task.index());
cm->follow_marking_stacks();
}
while (ParCompactionManager::steal(which, &random_seed, obj)) {
obj->follow_contents(cm);
cm->follow_marking_stacks();
}
} while (!terminator()->offer_termination());
}
void MarkSweep::follow_stack() {
do {
while (!_marking_stack.is_empty()) {
oop obj = _marking_stack.pop();
assert (obj->is_gc_marked(), "p must be marked");
obj->follow_contents();
}
// Process ObjArrays one at a time to avoid marking stack bloat.
if (!_objarray_stack.is_empty()) {
ObjArrayTask task = _objarray_stack.pop();
ObjArrayKlass* k = (ObjArrayKlass*)task.obj()->klass();
k->oop_follow_contents(task.obj(), task.index());
}
} while (!_marking_stack.is_empty() || !_objarray_stack.is_empty());
}
void ParCompactionManager::follow_marking_stacks() {
do {
// Drain the overflow stack first, to allow stealing from the marking stack.
oop obj;
while (marking_stack()->pop_overflow(obj)) {
follow_contents(obj);
}
while (marking_stack()->pop_local(obj)) {
follow_contents(obj);
}
// Process ObjArrays one at a time to avoid marking stack bloat.
ObjArrayTask task;
if (_objarray_stack.pop_overflow(task) || _objarray_stack.pop_local(task)) {
follow_contents((objArrayOop)task.obj(), task.index());
}
} while (!marking_stacks_empty());
assert(marking_stacks_empty(), "Sanity");
}
void ParCompactionManager::follow_marking_stacks() {
do {
// Drain the overflow stack first, to allow stealing from the marking stack.
oop obj;
while (marking_stack()->pop_overflow(obj)) {
obj->follow_contents(this);
}
while (marking_stack()->pop_local(obj)) {
obj->follow_contents(this);
}
// Process ObjArrays one at a time to avoid marking stack bloat.
ObjArrayTask task;
if (_objarray_stack.pop_overflow(task)) {
objArrayKlass* const k = (objArrayKlass*)task.obj()->blueprint();
k->oop_follow_contents(this, task.obj(), task.index());
} else if (_objarray_stack.pop_local(task)) {
objArrayKlass* const k = (objArrayKlass*)task.obj()->blueprint();
k->oop_follow_contents(this, task.obj(), task.index());
}
} while (!marking_stacks_empty());
assert(marking_stacks_empty(), "Sanity");
}
