1 ;;;; tests of the system's ability to catch resource exhaustion problems
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; While most of SBCL is derived from the CMU CL system, the test
7 ;;;; files (like this one) were written from scratch after the fork
10 ;;;; This software is in the public domain and is provided with
11 ;;;; absolutely no warranty. See the COPYING and CREDITS files for
12 ;;;; more information.
14 (cl:in-package :cl-user)
16 ;;; Prior to sbcl-0.7.1.38, doing something like (RECURSE), even in
17 ;;; safe code, would crash the entire Lisp process. Then the soft
18 ;;; stack checking was introduced, which checked (in safe code) for
19 ;;; stack exhaustion at each lambda.
21 ;;; Post 0.7.6.1, this was rewritten to use mprotect()-based stack
22 ;;; protection which does not require lisp code to check anything,
23 ;;; and works at all optimization settings. However, it now signals a
24 ;;; STORAGE-CONDITION instead of an ERROR.
32 ;;; Base-case: detecting exhaustion
33 (assert (eq :exhausted
36 (storage-condition (c)
40 ;;; Check that non-local control transfers restore the stack
41 ;;; exhaustion checking after unwinding -- and that previous test
43 (let ((exhaust-count 0)
47 (handler-bind ((storage-condition (lambda (c)
49 (if (= *count* (incf exhaust-count))
55 (assert (= exhaust-count recurse-count *count*)))
57 ;;; Check that we can safely use user-provided restarts to
59 (let ((exhaust-count 0)
62 (handler-bind ((storage-condition (lambda (c)
64 (if (= *count* (incf exhaust-count))
66 (invoke-restart (find-restart 'ok))))))
68 (with-simple-restart (ok "ok")
71 (assert (= exhaust-count recurse-count *count*)))
73 (with-test (:name (:exhaust :binding-stack))
75 (symbols (loop repeat 1024 collect (gensym)))
76 (values (loop repeat 1024 collect nil)))
78 (labels ((exhaust-binding-stack (i)
80 (exhaust-binding-stack (1+ i)))))
82 (exhaust-binding-stack 0)
83 (sb-kernel::binding-stack-exhausted ()
87 #+c-stack-is-control-stack
88 (with-test (:name (:exhaust :alien-stack))
90 (labels ((exhaust-alien-stack (i)
91 (with-alien ((integer-array (array int 500)))
92 (+ (deref integer-array 0)
93 (exhaust-alien-stack (1+ i))))))
95 (exhaust-alien-stack 0)
96 (sb-kernel::alien-stack-exhausted ()