[Webkit-unassigned] [Bug 219589] failed to use os_signpost with Instruments to collect some trace in webkit

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=219589

--- Comment #2 from shuangshuang <zhousstest at gmail.com> ---
Hi, does anyone has some ideas on this?

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