During the investigation for JDK-8259271 we found that the compiler (rightfully) reordered some loads that were written concurrently that caused crashes.
An assert in the pointer_delta() methods would have caught that unintentional reordering. pointer_delta() implicitly assumes left >= right, since the point of it is to use unsigned arithmetic to be able to deal with large memory ranges that exceed the range of ptrdiff_t.
Investigate adding an assert in pointer_delta (and see what else crashes).
An assert in the pointer_delta() methods would have caught that unintentional reordering. pointer_delta() implicitly assumes left >= right, since the point of it is to use unsigned arithmetic to be able to deal with large memory ranges that exceed the range of ptrdiff_t.
Investigate adding an assert in pointer_delta (and see what else crashes).
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JDK-8267579 Thread::cooked_allocated_bytes() hits assert(left >= right) failed: avoid underflow
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- Resolved
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