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c01a2a757e
* libguile/smob.c (clear_smobnum): New helper. (finalize_smob): Re-set the smobnum to the "finalized smob" type before finalizing. Fixes #19883. (scm_smob_prehistory): Pre-register a "finalized smob" type, which has no mark procedure. * test-suite/standalone/test-smob-mark-race.c: New file. * test-suite/standalone/Makefile.am: Arrange to build and run the new test.
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/* Copyright (C) 2016 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 License
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* as published by the Free Software Foundation; either version 3 of
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* 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, but
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* 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
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* 02110-1301 USA
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*/
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#if HAVE_CONFIG_H
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#include <config.h>
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#endif
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#undef NDEBUG
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#include <libguile.h>
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#include <assert.h>
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static SCM
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mark_smob (SCM smob)
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{
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assert (SCM_SMOB_DATA (smob) == 1);
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return SCM_BOOL_F;
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}
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static size_t
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finalize_smob (SCM smob)
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{
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assert (SCM_SMOB_DATA (smob) == 1);
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SCM_SET_SMOB_DATA (smob, 0);
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/* Allocate a bit in the hopes of triggering a new GC, making the
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marker race with the finalizer. */
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scm_cons (SCM_BOOL_F, SCM_BOOL_F);
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return 0;
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}
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static void
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tests (void *data, int argc, char **argv)
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{
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scm_t_bits tc16;
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int i;
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tc16 = scm_make_smob_type ("smob with finalizer", 0);
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scm_set_smob_mark (tc16, mark_smob);
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scm_set_smob_free (tc16, finalize_smob);
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for (i = 0; i < 1000 * 1000; i++)
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scm_new_smob (tc16, 1);
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}
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int
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main (int argc, char *argv[])
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{
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scm_boot_guile (argc, argv, tests, NULL);
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return 0;
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}
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