[jdk11u-dev] RFR: 8272791: java -XX:BlockZeroingLowLimit=1 crashes after 8270947

[Xin Liu]

This is a stacked PR(3/3) of https://github.com/openjdk/jdk11u-dev/pull/1502.

This patch is one of the trailing bugfix of JDK-8270947. We can apply to jdk11u cleanly.

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Depends on: https://git.openjdk.org/jdk11u-dev/pull/1503

Commit messages:
 - Backport e17118aa8afb14dfca049f19fd98a1483b2b5c1b

Changes: https://git.openjdk.org/jdk11u-dev/pull/1504/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1504&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8272791
  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1504.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1504/head:pull/1504

PR: https://git.openjdk.org/jdk11u-dev/pull/1504