[webkit-dev] Switching open source Debug bots to building and testing with configuration --force-opt=O3

[Yusuke Suzuki]

For EWS, we are running Release build right now. So in terms of stack traces, nothing is changed.

-Yusuke

> On Jun 17, 2020, at 5:21 PM, Alexey Proskuryakov <ap at webkit.org> wrote:
> 
> 
> I frequently find it critically useful to see stack traces from debug builds, because of no inlining. So I don't think that we should do this. A local build does not help when the issue is not readily reproducible.
> 
> - Alexey
> 
> 
>> 17 июня 2020 г., в 1:36 PM, Mark Lam <mark.lam at apple.com <mailto:mark.lam at apple.com>> написал(а):
>> 
>> Hi folks,
>> 
>> We're planning to switch the JSC EWS bot and build.webkit.org <http://build.webkit.org/> Debug build and test bots to building with the following set first:
>> ./Tools/Scripts/set-webkit-configuration --force-opt=O3
>> 
>> This means the Debug builds will be built with optimization level forced to O3.
>> 
>> Why are we doing this?
>> 1. So that the JSC EWS will start catching ASSERT failures.
>> 2. JSC stress test Debug bots have been timing out and not running tests at all.  Hopefully, this change will fix this issue.
>> 3. Tests will run to completion faster and we’ll catch regressions sooner.
>> 
>> The downside: crash stack traces will be like Release build stack traces.  But I don’t think we should let this deter us.  It’s not like there’s no stack information.  And just as we do with debugging Release build test failures, we can always do a Debug build locally to do our debugging.
>> 
>> We would like to apply this change to all Debug build and test bots, not just the JSC ones.  Does anyone strongly object to this change?
>> 
>> Thanks.
>> 
>> Cheers,
>> Mark
>> 
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> 
> 
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