> Consider this layout: > > > MemoryLayout SEQ = MemoryLayout.sequenceLayout(5, > MemoryLayout.sequenceLayout(10, JAVA_INT)); > > > And the corresponding offset handle: > > > MethodHandle offsetHandle = SEQ.offsetHandle(PathElement.sequenceLayout(), > PathElement.sequenceLayout()); > > > The resulting method handle takes two additional `long` indices. The > implementation checks that the dynamically provided indices conform to the > bound available at construction: that is, the first index must be < 5, while > the second must be < 10. If this is not true, an `IndexOutOfBoundException` > is thrown. > > However, the javadoc for `MemoryLayout::byteOffsetHandle` doesn't claim > anything in this direction. There are only some vague claims in the javadoc > for `PathElement::sequenceElement()` and `PathElement::sequenceElement(long, > long, long)` which make some claims on which indices are actually allowed, > but the text seems more in the tone of a discussion, rather than actual > normative text. > > I've tweaked the javadoc for `MemoryLayout::byteOffsetHandle` to actually > state that the indices will be checked against the "size" of the > corresponding open path element (this is a new concept that I also have > defined in the javadoc). > > I also added a test for `byteOffsetHandle` as I don't think we had a test for > that specifically (although this method is tested indirectly, via > `MemoryLayout::varHandle`).
Maurizio Cimadamore has updated the pull request incrementally with one additional commit since the last revision: Replace > 0 with >= 0 ------------- Changes: - all: https://git.openjdk.org/jdk/pull/19158/files - new: https://git.openjdk.org/jdk/pull/19158/files/aa77995c..d46387a7 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=19158&range=03 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19158&range=02-03 Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/19158.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/19158/head:pull/19158 PR: https://git.openjdk.org/jdk/pull/19158
