Issue #11603 has been updated by Takashi Kokubun.


Byebug 7.0.0 including https://github.com/deivid-rodriguez/byebug/pull/160 is released to rubygems.org the day before yesterday.
Since byebug gem is installed by Rails' default Gemfile, I guess many users may have chance to cause this SEGV.

Could you review this and point out what is a blocker to merge this patch?

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Bug #11603: Count trace_running for internal event
https://bugs.ruby-lang.org/issues/11603#change-54721

* Author: Takashi Kokubun
* Status: Open
* Priority: Normal
* Assignee: Koichi Sasada
* ruby -v: ruby 2.3.0dev (2015-10-19 trunk 52192) [x86_64-darwin14]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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https://github.com/ruby/ruby/pull/1059

I want to fix a crash: https://gist.github.com/k0kubun/86fd9fbff32423bd4974

I noticed that clean_hooks can be executed inside exec_hooks_body. 
The hooks of list->hooks can be xfreed during exec_hooks_body. 
That's because th->vm->trace_running is not incremented for exec_hooks_unprotected.

So I fixed rb_threadptr_exec_event_hooks_orig to count exec_hooks_unprotected as th->vm->trace_running too.

---Files--------------------------------
ruby_2015-10-19-221406_P607.crash (18 KB)
patch.diff (549 Bytes)


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