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8031686: G1: assert(_hrs.max_length() == _expansion_regions) failed

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Using pointer_delta to avoid overflowing pointer calculation.

Reviewed-by: jmasa, tschatzl
This commit is contained in:
Stefan Johansson 2014-01-20 10:55:54 +01:00
parent 9b29efeb63
commit a23ee6de8d
2 changed files with 63 additions and 1 deletions
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2
hotspot/src/share/vm/gc_implementation/g1/g1BiasedArray.hpp
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@ -79,7 +79,7 @@ protected:
assert((uintptr_t)end % mapping_granularity_in_bytes == 0,
err_msg("end mapping area address must be a multiple of mapping granularity %zd, is "PTR_FORMAT,
mapping_granularity_in_bytes, end));
size_t num_target_elems = (end - bottom) / (mapping_granularity_in_bytes / HeapWordSize);
size_t num_target_elems = pointer_delta(end, bottom, mapping_granularity_in_bytes);
idx_t bias = (uintptr_t)bottom / mapping_granularity_in_bytes;
address base = create_new_base_array(num_target_elems, target_elem_size_in_bytes);
initialize_base(base, num_target_elems, bias, target_elem_size_in_bytes, log2_intptr(mapping_granularity_in_bytes));