RFR: 8305590: Remove nothrow exception specifications from operator new [v2]

[David Holmes]

On Wed, 19 Apr 2023 10:25:49 GMT, Afshin Zafari <duke at openjdk.org> wrote:

>> - The `throw()` (i.e., no throw) specifications are removed from the instances of `operator new` where _do not_ return `nullptr`.
>> 
>> - The `-fcheck-new` is removed from the gcc compile flags.
>> 
>> - The `operator new` and `operator delete` are deleted from `StackObj`.
>> 
>> - The `GrowableArrayCHeap::operator delete` is added to be matched with its corresponding allocation`AnyObj::operator new`, because gcc complains on that after removing the `-fcheck-new` flag. 
>> - The `Thread::operator new`with and without `null` return are removed.
>> 
>> ### Tests
>> local: linux-x64 gtest:GrowableArrayCHeap, macosx-aarch64 hotspot:tier1
>> mach5: tiers 1-5
>
> Afshin Zafari has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8305590: Remove nothrow exception specifications from operator new

src/hotspot/share/jfr/utilities/jfrAllocation.hpp line 2:

> 1: /*
> 2:  * Copyright (c) 2014, 2023, Oracle and/or its affiliates. All rights reserved.

This appears to be the only change to this file so should be reverted.

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PR Review Comment: https://git.openjdk.org/jdk/pull/13498#discussion_r1171223970