#systemtap on 2020-07-20 — irc logs at freenode.irclog.whitequark.org

2015-11-12 23:18 fche changed the topic of #systemtap to: http://sourceware.org/systemtap; email systemtap@sourceware.org if answers here not timely, conversations may be logged

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17:05 <fche> agentzh, hey dude, around?

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18:28 <irker509> systemtap: amerey systemtap.git:PR26015 * release-4.3-44-ga79b24b6a / elaborate.cxx parse.cxx staptree.cxx staptree.h: Allow individual probes to have both a prologue and epilogue.

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19:33 <agentzh> fche: yeah

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19:46 <azhang> agentzh, I'm the intern from perftools team and currently working on PR13838, I found that you have done related work according to https://twitter.com/agentzh/status/1151718849307389952. Would you share the code? Thanks!

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20:03 <agentzh> azhang: that code has some copyright issues for the systemtap project unfortunately.

20:03 <agentzh> sorry about that.

20:04 <azhang> I see, np:)

20:04 <azhang> Thank you anyway

20:04 <agentzh> sure

20:04 <fche> agentzh, we're embarking on some initial floating point support soonish

20:05 <fche> if copyright prevents use of your goodies, okay, but have any wisdom to share? are you still using that?

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23:01 <agentzh> fche: we were using a software floating point number implementation.

23:01 <agentzh> it's a BSD license or MIT license code.

23:01 <agentzh> i wonder if it'll be a problem for merging.

23:01 <agentzh> if it's fine, i can share my code with you guys.

23:01 <agentzh> it's the berkeley softfloat library.

23:02 <agentzh> systemtap is GPL licensed. so i was concerned that it would be an issue.

23:03 <agentzh> it's been working well for us.

23:03 <agentzh> we also implemented reading float/double from userland.

23:03 <agentzh> as well as all the int/float conversions.

23:04 <agentzh> and some fpn functions like abs, sqrt, and etc.

23:05 <agentzh> we used code from this oss: http://www.jhauser.us/arithmetic/SoftFloat.html

23:06 <agentzh> it's the U.C. Berkeley open-source license.

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