RFR: 8351334: [ubsan] memoryReserver.cpp:552:60: runtime error: applying non-zero offset 1073741824 to null pointer [v2]

[Afshin Zafari]

> The minimum acceptable value was 0 where using it as address was problematic according to UBSAN.
> The acceptable value is changed to 64K.
> 
> Tests:
> linux-x64 tier1

Afshin Zafari has updated the pull request incrementally with one additional commit since the last revision:

  first round of fixes

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/26955/files
  - new: https://git.openjdk.org/jdk/pull/26955/files/2c2a2b94..239df39b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26955&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26955&range=00-01

  Stats: 24 lines in 3 files changed: 10 ins; 2 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/26955.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26955/head:pull/26955

PR: https://git.openjdk.org/jdk/pull/26955