src/share/vm/memory/collectorPolicy.cpp
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*** 262,271 ****
--- 262,292 ----
}
}
// need to do this again
MaxHeapSize = align_size_up(MaxHeapSize, max_alignment());
+ // adjust max heap size if necessary
+ if (NewSize + OldSize > MaxHeapSize) {
+ if (FLAG_IS_CMDLINE(MaxHeapSize)) {
+ // somebody set a maximum heap size with the intention that we should not
+ // exceed it. Adjust New/OldSize as necessary.
+ uintx calculated_size = NewSize + OldSize;
+ double shrink_factor = (double) MaxHeapSize / calculated_size;
+ // align
+ NewSize = align_size_down((uintx) (NewSize * shrink_factor), min_alignment());
+ // OldSize is already aligned because above we aligned MaxHeapSize to
+ // max_alignment(), and we just made sure that NewSize is aligned to
+ // min_alignment(). In initialize_flags() we verified that max_alignment()
+ // is a multiple of min_alignment().
+ OldSize = MaxHeapSize - NewSize;
+ } else {
+ MaxHeapSize = NewSize + OldSize;
+ }
+ }
+ // need to do this again
+ MaxHeapSize = align_size_up(MaxHeapSize, max_alignment());
+
always_do_update_barrier = UseConcMarkSweepGC;
// Check validity of heap flags
assert(OldSize % min_alignment() == 0, "old space alignment");
assert(MaxHeapSize % max_alignment() == 0, "maximum heap alignment");