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Added:

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sandbox-eval-handlers
  set-eval-handler
  call-with-custodian-shutdown
  call-with-killing-threads
Added optional `unrestricted?' argument to `call-in-sandbox-context'

svn: r12885
This commit is contained in:
Eli Barzilay 2008-12-18 13:35:49 +00:00
parent 7dc5bd7a74
commit 0c85f221be
1 changed files with 49 additions and 17 deletions
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66
collects/scheme/sandbox.ss
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@ -25,11 +25,13 @@
sandbox-make-logger
sandbox-memory-limit
sandbox-eval-limits
sandbox-eval-handlers
call-with-trusted-sandbox-configuration
evaluator-alive?
kill-evaluator
break-evaluator
set-eval-limits
set-eval-handler
put-input
get-output
get-error-output
@ -362,6 +364,28 @@
[(with-limits sec mb body ...)
(call-with-limits sec mb (lambda () body ...))]))
;; other resource utilities
(define (call-with-custodian-shutdown thunk)
(let ([cust (make-custodian (current-custodian))])
(dynamic-wind
void
(lambda () (parameterize ([current-custodian cust]) (thunk)))
(lambda () (custodian-shutdown-all cust)))))
(define (call-with-killing-threads thunk)
(let* ([cur (current-custodian)] [sub (make-custodian cur)])
(define (kill-all x)
(cond [(custodian? x) (for-each kill-all (custodian-managed-list x cur))]
[(thread? x) (kill-thread x)]))
(dynamic-wind
void
(lambda () (parameterize ([current-custodian sub]) (thunk)))
(lambda () (kill-all sub)))))
(define sandbox-eval-handlers
(make-parameter (list #f call-with-custodian-shutdown)))
;; Execution ----------------------------------------------------------------
(define (literal-identifier=? x y)
@ -555,6 +579,7 @@
(define-evaluator-messenger kill-evaluator 'kill)
(define-evaluator-messenger break-evaluator 'break)
(define-evaluator-messenger (set-eval-limits secs mb) 'limits)
(define-evaluator-messenger (set-eval-handler handler) 'handler)
(define-evaluator-messenger (put-input . xs) 'input)
(define-evaluator-messenger get-output 'output)
(define-evaluator-messenger get-error-output 'error-output)
@ -585,13 +610,18 @@
(define output #f)
(define error-output #f)
(define limits (sandbox-eval-limits))
(define eval-handler (car (sandbox-eval-handlers))) ; 1st handler on startup
(define user-thread #t) ; set later to the thread
(define user-done-evt #t) ; set in the same place
(define terminated? #f) ; set to an exception value when the sandbox dies
(define (limit-thunk thunk)
(let* ([sec (and limits (car limits))]
[mb (and limits (cadr limits))])
(if (or sec mb) (lambda () (call-with-limits sec mb thunk)) thunk)))
[mb (and limits (cadr limits))]
[thunk (if (or sec mb)
(lambda () (call-with-limits sec mb thunk))
thunk)]
[thunk (if eval-handler (lambda () (eval-handler thunk)) thunk)])
thunk))
(define (terminated! reason)
(unless terminated?
(set! terminated?
@ -632,6 +662,7 @@
limit-thunk
(and coverage? (lambda (es+get) (set! uncovered es+get))))
(channel-put result-ch 'ok))
(set! eval-handler (cadr (sandbox-eval-handlers))) ; interactions handler
;; finally wait for interaction expressions
(let ([n 0])
(let loop ()
@ -641,13 +672,13 @@
(with-handlers ([void (lambda (exn)
(channel-put result-ch (cons 'exn exn)))])
(define run
(limit-thunk (if (evaluator-message? expr)
(lambda ()
(apply (evaluator-message-msg expr)
(evaluator-message-args expr)))
(lambda ()
(set! n (add1 n))
(eval* (input->code (list expr) 'eval n))))))
(restrict-thunk (if (evaluator-message? expr)
(lambda ()
(apply (evaluator-message-msg expr)
(evaluator-message-args expr)))
(lambda ()
(set! n (add1 n))
(eval* (input->code (list expr) 'eval n))))))
(channel-put result-ch (cons 'vals (call-with-values run list))))
(loop)))))
(define (get-user-result)
@ -696,16 +727,17 @@
(if (evaluator-message? expr)
(let ([msg (evaluator-message-msg expr)])
(case msg
[(alive?) (and user-thread (not (thread-dead? user-thread)))]
[(kill) (terminate+kill! 'evaluator-killed #f)]
[(break) (user-break)]
[(limits) (set! limits (evaluator-message-args expr))]
[(input) (apply input-putter (evaluator-message-args expr))]
[(output) (output-getter output)]
[(alive?) (and user-thread (not (thread-dead? user-thread)))]
[(kill) (terminate+kill! 'evaluator-killed #f)]
[(break) (user-break)]
[(limits) (set! limits (evaluator-message-args expr))]
[(handler) (set! eval-handler (car (evaluator-message-args expr)))]
[(input) (apply input-putter (evaluator-message-args expr))]
[(output) (output-getter output)]
[(error-output) (output-getter error-output)]
[(uncovered) (apply get-uncovered (evaluator-message-args expr))]
[(thunk) (user-eval (make-evaluator-message
(car (evaluator-message-args expr)) '()))]
[(thunk) (user-eval (make-evaluator-message
(car (evaluator-message-args expr)) '()))]
[else (error 'evaluator "internal error, bad message: ~e" msg)]))
(user-eval expr)))
(define (make-output what out set-out! allow-link?)