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8204685: Abstraction for TLAB dummy object

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Reviewed-by: tschatzl, shade
This commit is contained in:
Roman Kennke 2018-06-13 10:15:35 +02:00
parent 74e093f058
commit cc206eaca5
4 changed files with 9 additions and 3 deletions
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4
src/hotspot/share/gc/shared/collectedHeap.cpp
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@ -526,6 +526,10 @@ void CollectedHeap::fill_with_objects(HeapWord* start, size_t words, bool zap)
fill_with_object_impl(start, words, zap);
}
void CollectedHeap::fill_with_dummy_object(HeapWord* start, HeapWord* end, bool zap) {
CollectedHeap::fill_with_object(start, end, zap);
}
HeapWord* CollectedHeap::allocate_new_tlab(size_t min_size,
size_t requested_size,
size_t* actual_size) {

2
src/hotspot/share/gc/shared/collectedHeap.hpp
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@ -350,6 +350,8 @@ class CollectedHeap : public CHeapObj<mtInternal> {
fill_with_object(start, pointer_delta(end, start), zap);
}
virtual void fill_with_dummy_object(HeapWord* start, HeapWord* end, bool zap);
// Return the address "addr" aligned by "alignment_in_bytes" if such
// an address is below "end". Return NULL otherwise.
inline static HeapWord* align_allocation_or_fail(HeapWord* addr,

4
src/hotspot/share/gc/shared/plab.cpp
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@ -82,14 +82,14 @@ void PLAB::retire() {
size_t PLAB::retire_internal() {
size_t result = 0;
if (_top < _hard_end) {
CollectedHeap::fill_with_object(_top, _hard_end);
Universe::heap()->fill_with_dummy_object(_top, _hard_end, true);
result += invalidate();
}
return result;
}
void PLAB::add_undo_waste(HeapWord* obj, size_t word_sz) {
CollectedHeap::fill_with_object(obj, word_sz);
Universe::heap()->fill_with_dummy_object(obj, obj + word_sz, true);
_undo_wasted += word_sz;
}

2
src/hotspot/share/gc/shared/threadLocalAllocBuffer.cpp
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@ -114,7 +114,7 @@ void ThreadLocalAllocBuffer::make_parsable(bool retire, bool zap) {
myThread()->incr_allocated_bytes(used_bytes());
}
CollectedHeap::fill_with_object(top(), hard_end(), retire && zap);
Universe::heap()->fill_with_dummy_object(top(), hard_end(), retire && zap);
if (retire || ZeroTLAB) { // "Reset" the TLAB
set_start(NULL);