RFR: JDK-8298445: Add LeakSanitizer support in HotSpot [v2]

[Justin King]

On Thu, 2 Feb 2023 06:06:04 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> src/hotspot/share/runtime/arguments.cpp line 3979:
>> 
>>> 3977:   // LSAN relies on pointers to be natively aligned. Using compressed class pointers breaks this
>>> 3978:   // expectation and results in nondeterministic leak reports.
>>> 3979:   if (FLAG_SET_CMDLINE(UseCompressedOops, false) != JVMFlag::SUCCESS) {
>> 
>> This positioning doesn't look right. There are a number of inter-dependencies on the compressed oops flags and I don't think you can just turn them off here. Surely `Arguments::set_use_compressed_oops()` is where this needs to be done?
>
> Not sure FLAG_SET_CMDLINE is right here either (but flag setting is very confusing).

Removed, no longer needed. I'll explain below.

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

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