RFR: 8299748: java/util/zip/Deinflate.java failing on s390x

[Amit Kumar]

On Wed, 15 Feb 2023 08:15:28 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>I assume you can quickly check which loop, I suspect it's the deflate loop based of the previous comments/experiments.

Both of loop's are  inf-loops with this change. If somehow I terminate the first loop then second goes into infinite state. 

>Your initial proposal was to increase the size of out1 but I can't see any cases in this test where the deflate fills out1 completely.

Alan Here are some stats (after increasing the `out1` size with a factor of 32), where I was looking for `what size of array do we need to store compressed data` and `array capacity we have`: 

Capacity with out1 * 32: 557056 <-> Buffer we need 552981
Capacity with out1 * 32: 557056 <-> Buffer we need 552975

Initial size of `out1`:  525312

As you can see, the size of out1 is insufficient for the s390x. That's why I proposed the fix to increase the buffer size. 
Because the compressor is not deterministic, I don't want to be byte-perfect, so I changed the multiplier to `64` to leave some extra space here.

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PR: https://git.openjdk.org/jdk/pull/12283