X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=tests%2Fexhaust.impure.lisp;h=6233f11a11320ca83b0cbf57b9029b025318f8d1;hb=d7875c296a4988e9f27e2776237884deb1984c62;hp=0956f29160b4f9db2547abce68ca39be36407ca7;hpb=bcbbce86c47a1c530d488c7876a453100fcd933e;p=sbcl.git

diff --git a/tests/exhaust.impure.lisp b/tests/exhaust.impure.lisp
index 0956f29..6233f11 100644
--- a/tests/exhaust.impure.lisp
+++ b/tests/exhaust.impure.lisp
@@ -6,21 +6,108 @@
 ;;;; While most of SBCL is derived from the CMU CL system, the test
 ;;;; files (like this one) were written from scratch after the fork
 ;;;; from CMU CL.
-;;;; 
+;;;;
 ;;;; This software is in the public domain and is provided with
 ;;;; absolutely no warranty. See the COPYING and CREDITS files for
 ;;;; more information.
 
 (cl:in-package :cl-user)
+
+(load "test-util.lisp")
+(load "assertoid.lisp")
+(use-package "TEST-UTIL")
+(use-package "ASSERTOID")
+
 
 ;;; Prior to sbcl-0.7.1.38, doing something like (RECURSE), even in
-;;; safe code, would crash the entire Lisp process. Now it should
-;;; signal an error in a context where the soft stack limit has been
-;;; relaxed enough that the error can be handled.
-(locally
-  (declare (optimize safety))
-  (defun recurse () (recurse) (recurse))
-  (ignore-errors (recurse)))
-
-;;; success
-(quit :unix-status 104)
+;;; safe code, would crash the entire Lisp process. Then the soft
+;;; stack checking was introduced, which checked (in safe code) for
+;;; stack exhaustion at each lambda.
+
+;;; Post 0.7.6.1, this was rewritten to use mprotect()-based stack
+;;; protection which does not require lisp code to check anything,
+;;; and works at all optimization settings.  However, it now signals a
+;;; STORAGE-CONDITION instead of an ERROR.
+
+(defun recurse ()
+  (recurse)
+  (recurse))
+
+(defvar *count* 100)
+
+;;; Base-case: detecting exhaustion
+(with-test (:name (:exhaust :basic) :broken-on '(and :sunos :x86-64))
+  (assert (eq :exhausted
+              (handler-case
+                  (recurse)
+                (storage-condition (c)
+                  (declare (ignore c))
+                  :exhausted)))))
+
+;;; Check that non-local control transfers restore the stack
+;;; exhaustion checking after unwinding -- and that previous test
+;;; didn't break it.
+(with-test (:name (:exhaust :non-local-control)
+                  :broken-on '(and :sunos :x86-64)
+                  :skipped-on :win32)
+  (let ((exhaust-count 0)
+        (recurse-count 0))
+    (tagbody
+     :retry
+       (handler-bind ((storage-condition (lambda (c)
+                                           (declare (ignore c))
+                                           (if (= *count* (incf exhaust-count))
+                                               (go :stop)
+                                               (go :retry)))))
+         (incf recurse-count)
+         (recurse))
+     :stop)
+    (assert (= exhaust-count recurse-count *count*))))
+
+;;; Check that we can safely use user-provided restarts to
+;;; unwind.
+(with-test (:name (:exhaust :restarts)
+                  :broken-on '(and :sunos :x86-64)
+                  :skipped-on :win32)
+  (let ((exhaust-count 0)
+        (recurse-count 0))
+    (block nil
+      (handler-bind ((storage-condition (lambda (c)
+                                          (declare (ignore c))
+                                          (if (= *count* (incf exhaust-count))
+                                              (return)
+                                              (invoke-restart (find-restart 'ok))))))
+        (loop
+           (with-simple-restart (ok "ok")
+             (incf recurse-count)
+             (recurse)))))
+    (assert (= exhaust-count recurse-count *count*))))
+
+(with-test (:name (:exhaust :binding-stack))
+  (let ((ok nil)
+        (symbols (loop repeat 1024 collect (gensym)))
+        (values (loop repeat 1024 collect nil)))
+    (gc :full t)
+    (labels ((exhaust-binding-stack (i)
+               (progv symbols values
+                 (exhaust-binding-stack (1+ i)))))
+      (handler-case
+          (exhaust-binding-stack 0)
+        (sb-kernel::binding-stack-exhausted ()
+          (setq ok t)))
+      (assert ok))))
+
+(with-test (:name (:exhaust :alien-stack)
+                  :skipped-on '(or (not :c-stack-is-control-stack)))
+  (let ((ok nil))
+    (labels ((exhaust-alien-stack (i)
+               (with-alien ((integer-array (array int 500)))
+                 (+ (deref integer-array 0)
+                    (exhaust-alien-stack (1+ i))))))
+      (handler-case
+          (exhaust-alien-stack 0)
+        (sb-kernel::alien-stack-exhausted ()
+          (setq ok t)))
+      (assert ok))))
+
+;;; OK!