Integrated: JDK-8298445: Add LeakSanitizer support in HotSpot

[Justin King]

On Thu, 26 Jan 2023 17:33:28 GMT, Justin King <jcking at openjdk.org> wrote:

> Adds initial LSan (LeakSanitizer) support to Hotspot. This setup has been used to identify multiple leaks so far. It can run most of the test suite except those that also fail with ASan, which is being looked at separately. It is especially useful when combined with ASan, as LSan can use poisoning information to determine what memory to scan or not to scan, making leak detection more accurate and faster.
> 
> **Suppressing:**
> Currently the suppression list is only used to suppress JLI leaks that are known, the rest are done in code. Suppressing needs to identify the source of thet leak. Due to Hotspot's code organization, we would need to suppress `os::malloc` and friends, which would suppress everything. Suppressing in code has the added benefit of being explicit and surviving refactors if methods change.
> 
> **Caveats:**
> - By default ASan enables LSan, however we explicitly disable it unless `--enable-lsan` is given. It is useful to be able to use ASan without LSan. Using LSan by itself is less likely to be useful and will probably not work, but its still possible currently.

This pull request has now been integrated.

Changeset: 27126157
Author:    Justin King <jcking at openjdk.org>
Committer: Magnus Ihse Bursie <ihse at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/27126157d927c5ec4354cde8f31076899691996b
Stats:     316 lines in 22 files changed: 307 ins; 0 del; 9 mod

8298445: Add LeakSanitizer support in HotSpot

Reviewed-by: erikj, ihse

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PR: https://git.openjdk.org/jdk/pull/12229