RFR: 8259008: ArithmeticException was thrown at "Monitor Cache Dump" on HSDB [v4]

[Yasumasa Suenaga]

On Tue, 26 Jan 2021 08:23:28 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

>> I'd say that's a bug, and probably what was meant is to do a `println` for every monitor found, not just the first one. So what you would want then is to bracket the `while` loop with `if (itr.hasNext()) {` and move the `return` outside the `while` loop but still inside the `if` block.
>
> I agree, it can be a bug.
> There was this suggestion from Dan:
> `Is it reasonable to expect at least one ObjectMonitor to be found?`
>  so, I assumed, this loop is implementing it.

I updated testcase to use `if` rather than `while`.
As I said in [previous comment](https://github.com/openjdk/jdk/pull/1910/files#r562807477), I want to check hether SA can find the monitors here. We don't need to iterate all monitors when we check it to work.

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PR: https://git.openjdk.java.net/jdk/pull/1910