[racket-dev] call-with-limits memory bound isn't actually bounding memory usage

Just so we're clear, this should not OOM, but rather print #t?

#lang racket/load

(module A racket
 (provide global go)
 (define global '())
 (define (go) (set! global (cons (random) global)) (go)))

(module B racket
  (require racket/sandbox)
  (display
   (with-handlers ([exn:fail:resource? (λ (e)
                                          (case (exn:fail:resource-resource e)
                                            [(memory) #t]
                                            [else #f]))])
     (call-with-limits 10000 512 (λ () ((dynamic-require ''A 'go)))))))

(require 'B)

-Ian
----- Original Message -----
From: "Robby Findler" <robby at eecs.northwestern.edu>
To: "J. Ian Johnson" <ianj at ccs.neu.edu>
Cc: "dev" <dev at racket-lang.org>
Sent: Wednesday, September 11, 2013 3:34:55 PM GMT -05:00 US/Canada Eastern
Subject: Re: [racket-dev] call-with-limits memory bound isn't actually bounding memory usage


The namespace...? 



On Wed, Sep 11, 2013 at 2:20 PM, J. Ian Johnson < ianj at ccs.neu.edu > wrote: 


I've since changed to using a dynamic-require, but still the memory limit is not respected. Why wouldn the globals from a dynamic-require be considered reachable outside the sandbox that calls dynamic-require? There's no other way to get it. 

-Ian 
----- Original Message ----- 


From: "J. Ian Johnson" < ianj at ccs.neu.edu > 
To: "David Vanderson" < david.vanderson at gmail.com > 
Cc: "dev" < dev at racket-lang.org >, "J. Ian Johnson" < ianj at ccs.neu.edu > 
Sent: Monday, September 9, 2013 2:01:02 PM GMT -05:00 US/Canada Eastern 
Subject: Re: [racket-dev] call-with-limits memory bound isn't actually bounding memory usage 

Ah, that would probably be the problem. Without having to modify too much code, would the proper way to call a function entirely within the sandbox be to use dynamic-require in the thunk, rather than require in the module using call-with-limits? 
-Ian 
----- Original Message ----- 
From: "David Vanderson" < david.vanderson at gmail.com > 
To: "J. Ian Johnson" < ianj at ccs.neu.edu > 
Cc: "dev" < dev at racket-lang.org > 
Sent: Monday, September 9, 2013 1:50:13 PM GMT -05:00 US/Canada Eastern 
Subject: Re: [racket-dev] call-with-limits memory bound isn't actually bounding memory usage 

Just to make sure, is the memory being allocated reachable from outside 
the sandbox? 

http://www.cs.utah.edu/plt/publications/ismm04-addendum.txt 

On 09/09/2013 01:29 PM, J. Ian Johnson wrote: 
> I don't use the gui framework at all. This is all just pounding on global hash-tables and vectors. Or are you talking about the sandbox queuing up callbacks? 
> -Ian 
> ----- Original Message ----- 
> From: "Robby Findler" < robby at eecs.northwestern.edu > 
> To: "J. Ian Johnson" < ianj at ccs.neu.edu > 
> Cc: "dev" < dev at racket-lang.org > 
> Sent: Monday, September 9, 2013 1:16:51 PM GMT -05:00 US/Canada Eastern 
> Subject: Re: [racket-dev] call-with-limits memory bound isn't actually bounding memory usage 
> 
> 
> The framework will, sometimes do stuff that queues callbacks and, depending on how you've set up other things, the code running there might escape from the limit. Did you try putting the eventspace under the limit too? 
> 
> Robby 
> 
> 
> 
> On Mon, Sep 9, 2013 at 10:54 AM, J. Ian Johnson < ianj at ccs.neu.edu > wrote: 
> 
> 
> I'm running my analysis benchmarks in the context of (with-limits (* 30 60) 2048 <run-analysis>), and it's been good at killing the process when the run should time out, but now I have an instantiation of the framework that just gobbles up 15GiB of memory without getting killed. What might be going on here? 
> 
> Running 5.90.0.9 
> -Ian 
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