[jdk8u-dev] RFR: 8283849: AsyncGetCallTrace may crash JVM on guarantee

[Jaroslav Bachorik]

8283849: AsyncGetCallTrace may crash JVM on guarantee

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Commit messages:
 - Backport 19639855311a47ed532547743ea3873eb8b016d3

Changes: https://git.openjdk.org/jdk8u-dev/pull/73/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=73&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8283849
  Stats: 20 lines in 4 files changed: 18 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/73.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/73/head:pull/73

PR: https://git.openjdk.org/jdk8u-dev/pull/73