Bug 219589

Summary:	failed to use os_signpost with Instruments to collect some trace in webkit
Product:	WebKit	Reporter:	shuangshuang <zhousstest>
Component:	Web Template Framework	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED INVALID
Severity:	Normal	CC:	ap, cdumez, nham, simon.fraser, smoley, thorton, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Local Build
Hardware:	Unspecified
OS:	Other

Description shuangshuang 2020-12-07 00:26:17 PST

Hi, I try to collect some trace to understand some behaviors in webkit. I see that Xcode provides some os logging methods, and one is call "os_signpost". So I insert those trace functions in source codes and try to use Instruments to collect some trace. No error goes out but I cannot capture any reserved critical events displayed in Instruments.

Is os_signpost supported in webkit? If not, what other tools could we use to capture some start and end times of interested events?

Thanks

Comment 1 Radar WebKit Bug Importer 2020-12-07 13:57:01 PST

<rdar://problem/72062789>

Comment 2 shuangshuang 2020-12-09 00:11:56 PST

Hi, does anyone has some ideas on this?

Comment 3 Alexey Proskuryakov 2020-12-09 14:52:01 PST

Could you please reach out via one of the help channels listed at <https://webkit.org/getting-started/#staying-in-touch>? 

Since this is a question and there is no indication of a WebKit bug, resolving this bug report as invalid.

Comment 4 shuangshuang 2020-12-09 17:14:12 PST

Thanks AP! Sure, I've already done that and waiting for some reply.