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86fafc4402
Fixes <http://bugs.gnu.org/14001>. Reported by Dennis Clarke <dclarke@blastwave.org>. * test-suite/tests/gc.test ("gc")["Lexical vars are collectable"]: Wrap in `maybe-gc-flakiness'.
104 lines
3.4 KiB
Scheme
104 lines
3.4 KiB
Scheme
;;;; gc.test --- test guile's garbage collection -*- scheme -*-
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;;;; Copyright (C) 2000, 2001, 2004, 2006, 2007, 2008, 2009,
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;;;; 2011, 2012, 2013 Free Software Foundation, Inc.
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;;;;
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free Software
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;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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(define-module (tests gc)
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#:use-module (ice-9 documentation)
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#:use-module (test-suite lib)
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#:use-module ((system base compile) #:select (compile)))
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;; Some of these tests verify that things are collectable. As we use a
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;; third-party conservative collector, we really can't guarantee that --
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;; we can try, but on some platforms, on some versions (possibly), the
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;; test might fail. But we don't want that to stop the build. So,
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;; instead of failing, throw 'unresolved.
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;;
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(define (maybe-gc-flakiness result)
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(or result
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(throw 'unresolved)))
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;;;
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;;; miscellaneous
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;;;
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(define (documented? object)
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(not (not (object-documentation object))))
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;; In guile 1.6.4 this test bombed, due to the record in h being collected
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;; by the gc, but not removed from h, leaving "x" as a freed cell.
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;; The usual correct result here is for x to be #f, but there's always a
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;; chance gc will mark something used when it isn't, so we allow x to be a
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;; record too.
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(pass-if "weak-values versus records"
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(let ((rec-type (make-record-type "foo" '()))
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(h (make-weak-value-hash-table 61)))
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(hash-set! h "foo" ((record-constructor rec-type)))
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(gc)
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(let ((x (hash-ref h "foo")))
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(or (not x)
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((record-predicate rec-type) x)))))
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;;;
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;;;
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;;;
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(with-test-prefix "gc"
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(pass-if "after-gc-hook gets called"
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(let* ((foo #f)
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(thunk (lambda () (set! foo #t))))
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(add-hook! after-gc-hook thunk)
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(gc)
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(remove-hook! after-gc-hook thunk)
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foo))
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(pass-if "Unused modules are removed"
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(let* ((guard (make-guardian))
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(total 1000))
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(for-each (lambda (x) (guard (make-module))) (iota total))
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;; Avoid false references to the modules on the stack.
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(clear-stale-stack-references)
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(gc)
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(gc) ;; twice: have to kill the weak vectors.
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(gc) ;; thrice: because the test doesn't succeed with only
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;; one gc round. not sure why.
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(maybe-gc-flakiness
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(= (let lp ((i 0))
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(if (guard)
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(lp (1+ i))
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i))
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total))))
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(pass-if "Lexical vars are collectable"
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(let ((l (compile
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'(begin
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(define guardian (make-guardian))
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(let ((f (list 'foo)))
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(guardian f))
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((@ (test-suite lib) clear-stale-stack-references))
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(gc)(gc)(gc)
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(guardian))
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;; Prevent the optimizer from propagating f.
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#:opts '(#:partial-eval? #f))))
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(maybe-gc-flakiness (equal? l '(foo))))))
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