Issue #13412 has been updated by nobu (Nobuyoshi Nakada).


wanabe (_ wanabe) wrote:
> nobu (Nobuyoshi Nakada) wrote:
> > `ALLOCA` would be useful.
> 
> Is it platform dependent?

Yes, of course.

> `__builtin_alloca()` of gcc would be useful but `alloca()` in missing/alloca.c would not, I guess.

Only when `C_ALLOCA` is not defined.
See `reserve_stack` in thread_pthread.c.


----------------------------------------
Bug #13412: Infinite recursion with define_method may cause silent SEGV or cfp consistency error
https://bugs.ruby-lang.org/issues/13412#change-64358

* Author: wanabe (_ wanabe)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.5.0dev (2017-04-09 trunk 58286) [x86_64-linux]
* Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
The script causes silent (no output [BUG]) SEGV or "cfp consistency error" on my environment.

```ruby
define_method(:foo) { foo }

loop do
  1.times do
    1.times do
      begin
        foo
      rescue Exception
        nil
      end
    end
  end
end
```

I think this is related to #11430 (maybe same).

---Files--------------------------------
stderr.log (6.96 KB)
bug.rb (123 Bytes)
bug.sh (775 Bytes)
bug13412.r58331.patch (689 Bytes)
bug13412.r58367.patch (711 Bytes)
bug_stat.sh (296 Bytes)
bug.sh (786 Bytes)
bug_stat.sh (468 Bytes)
bug13412.r58367.patch (1 KB)
cfp_before_setjmp.patch (2.09 KB)
ensure_stack.patch (850 Bytes)
get_tagged_next_cfp.patch (3.33 KB)


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