RFR: 8267954: Shared classes that failed to load should not be loaded again [v2]

[Yumin Qi]

> Hi, Please review
>   Shared classes should not be loaded again at failed loading from CDS. In the failed case, restore_unshareable_info failed due to some reason (OOM), but the class already polluted and failed to be loaded again.
>   Using the unused bit in _misc_flags indicates shared loading status to prevent it from being loaded again.
> 
> Tests: tier1,tier2,tier3,tier4,tier7
> Local tests: jtreg/hotspot/runtime/cds
> TestDynamicDumpAtOom.java (which failed in tier7) with variant allocation sizes (used to reproduce the failure) passed.
> 
> Thanks
> Yumin

Yumin Qi has updated the pull request incrementally with one additional commit since the last revision:

  Move SharedClassLoadingMark to systemDictionaryShared.hpp

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4434/files
  - new: https://git.openjdk.java.net/jdk/pull/4434/files/3ca038ea..4cb6d351

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4434&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4434&range=00-01

  Stats: 37 lines in 4 files changed: 19 ins; 17 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4434.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4434/head:pull/4434

PR: https://git.openjdk.java.net/jdk/pull/4434