From: "uggsoutlet (uggsoutlet uggsoutlet)" Date: 2012-11-22T15:27:31+09:00 Subject: [ruby-core:49855] [ruby-trunk - Feature #2565] adding hooks for better tracing Issue #2565 has been updated by uggsoutlet (uggsoutlet uggsoutlet). =begin would be an excellent rule. Such an attitude would emphasize (()) sharply the value of life. Every day we should with gentleness, vigor, hold (()) the heart of thanksgiving to life. But when the time for endless days, months and years passed in (()) front of us, we are often not the seed feeling. Of course, there is also " eat, drink, enjoy .458gyu854 =end ---------------------------------------- Feature #2565: adding hooks for better tracing https://bugs.ruby-lang.org/issues/2565#change-33467 Author: yugui (Yuki Sonoda) Status: Closed Priority: Low Assignee: tenderlovemaking (Aaron Patterson) Category: core Target version: 2.0.0 =begin Hi, I made a commit that embeded dtrace probes into Ruby so that you can profile a Ruby application at runtime. (r26235) Adding probes had been approved by a Ruby developer's meeting, however, the commit was little larger than what other committers expected. I got some objection for the commit. [ruby-dev:39954] In the end, I decided to temporarily revert the commit. (r26243) I discussed how we should support dynamic runtime tracing, with ko1, mame, naruse, unak and shyouhei. The problems of the commit were: * the probes duplicated with the event_hook framework (rb_add_event_hook, Kernel#set_trace_func) * Design of the probes were not verified enough. * more trial and error are necessary, to make it clear what is necessary to trace a Ruby application. I accepted ko1's suggestion: * reverting the commit * adding some hooks for rb_add_event_hook(). * implementing probes for dynamic runtime tracing on the event_hook framework. * these probes can be implemented as a gem * I will aget a chance for trial and error. * The probes possibly will be merged into Ruby itself after enough designed and getting enough use cases. Here is a patch to add the hooks I and ko1 talked about. (attached) And here is an extension library that provides prove points to dtrace, on top of the hooks. (http://github.com/yugui/vm_probes ) What do you think? Can I commit the patch I attached? Thank you, -- Yuki Sonoda (Yugui) Attachment: adding-hooks.patch =end -- http://bugs.ruby-lang.org/