RFR: JDK-8298445: Add LeakSanitizer support in HotSpot [v3]

[David Holmes]

On Fri, 3 Feb 2023 04:26:40 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Justin King has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - Fix grammatical error
>>    
>>    Signed-off-by: Justin King <jcking at google.com>
>>  - Update based on review and remove restriction on compressed oops and class pointers
>>    
>>    Signed-off-by: Justin King <jcking at google.com>
>
> Updates look good - glad to see the flag changes go away!
> 
> I suggest factoring out the change to `test/jdk/jni/nullCaller/exeNullCallerTest.cpp` as it is a JDK test and not part of hotspot. Thanks.

> @dholmes-ora : Do all the sub-data tied to metaspace objects really have to live in C-heap?

@tstuefe  - sorry I have no knowledge about that. Perhaps @coleenp can answer?

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