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src/share/vm/gc/shenandoah/shenandoahConnectionMatrix.cpp
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@@ -34,48 +34,57 @@
_region_shift(ShenandoahHeapRegion::region_size_shift()),
_matrix(NEW_C_HEAP_ARRAY(char, max_regions * max_regions, mtGC)),
_magic_offset( ((uintptr_t) _matrix) - ( ((uintptr_t) ShenandoahHeap::heap()->first_region_bottom()) >> _region_shift) * (_stride + 1))
{
+ if (UseShenandoahMatrix) {
clear_all();
+ }
}
ShenandoahConnectionMatrix::~ShenandoahConnectionMatrix() {
FREE_C_HEAP_ARRAY(char, _matrix);
}
size_t ShenandoahConnectionMatrix::index_of(size_t from_idx, size_t to_idx) const {
+ assert (UseShenandoahMatrix, "call only when matrix is enabled");
return from_idx * _stride + to_idx;
}
bool ShenandoahConnectionMatrix::is_connected(size_t from_idx, size_t to_idx) const {
+ assert (UseShenandoahMatrix, "call only when matrix is enabled");
return _matrix[index_of(from_idx, to_idx)] > 0;
}
void ShenandoahConnectionMatrix::clear_connected(size_t from_idx, size_t to_idx) {
+ assert (UseShenandoahMatrix, "call only when matrix is enabled");
_matrix[index_of(from_idx, to_idx)] = 0;
}
void ShenandoahConnectionMatrix::clear_region(size_t idx) {
+ assert (UseShenandoahMatrix, "call only when matrix is enabled");
for (uint i = 0; i < _stride; i++) {
clear_connected(i, idx);
clear_connected(idx, i);
}
}
void ShenandoahConnectionMatrix::clear_region_outbound(size_t idx) {
+ assert (UseShenandoahMatrix, "call only when matrix is enabled");
for (uint i = 0; i < _stride; i++) {
clear_connected(idx, i);
}
}
void ShenandoahConnectionMatrix::clear_all() {
+ assert (UseShenandoahMatrix, "call only when matrix is enabled");
size_t count = sizeof(char) * _stride * _stride;
Copy::fill_to_bytes(_matrix, count, 0);
}
void ShenandoahConnectionMatrix::print_on(outputStream* st) const {
+ assert (UseShenandoahMatrix, "call only when matrix is enabled");
st->print_cr("Connection Matrix:");
st->print_cr("%8s, %10s, %10s, %10s, %8s, %s", "Region", "Live", "Used", "Garbage", "Refcnt", "Referenced by");
ShenandoahHeap* heap = ShenandoahHeap::heap();
size_t num_regions = heap->num_regions();
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