RFR: 7903696: JMH: Add xctrace-based perfasm profiler for macOS [v3]

[Aleksey Shipilev]

On Sat, 16 Mar 2024 15:51:24 GMT, Filipp Zhinkin <fzhinkin at openjdk.org> wrote:

>> Filipp Zhinkin has updated the pull request incrementally with three additional commits since the last revision:
>> 
>>  - 7903696: Removed an option unsupported by older xctrace version
>>  - 7903696: Support legacy backtrace format
>>  - 7903696: Detect xctrace using xcode-select
>
> jmh-core/src/main/java/org/openjdk/jmh/profile/XCTraceAsmProfiler.java line 2:
> 
>> 1: /*
>> 2:  * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
> 
> I was not sure about the copyright header, so plunked the Oracle's one.

Yeah, that's fine.

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PR Review Comment: https://git.openjdk.org/jmh/pull/130#discussion_r1571977119