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4396719: Mark Sweep stack overflow on deeply nested Object arrays

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Use an explicit stack for object arrays and process them in chunks.

Reviewed-by: iveresov, apetrusenko
This commit is contained in:
John Coomes 2010-03-03 14:48:26 -08:00
parent 5fdec09798
commit 4f82340476
26 changed files with 419 additions and 182 deletions
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11
hotspot/src/share/vm/utilities/taskqueue.cpp
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@ -31,10 +31,6 @@ uint ParallelTaskTerminator::_total_spins = 0;
uint ParallelTaskTerminator::_total_peeks = 0;
#endif
bool TaskQueueSuper::peek() {
return _bottom != _age.top();
}
int TaskQueueSetSuper::randomParkAndMiller(int *seed0) {
const int a = 16807;
const int m = 2147483647;
@ -180,6 +176,13 @@ void ParallelTaskTerminator::reset_for_reuse() {
}
}
#ifdef ASSERT
bool ObjArrayTask::is_valid() const {
return _obj != NULL && _obj->is_objArray() && _index > 0 &&
_index < objArrayOop(_obj)->length();
}
#endif // ASSERT
bool RegionTaskQueueWithOverflow::is_empty() {
return (_region_queue.size() == 0) &&
(_overflow_stack->length() == 0);