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ccf1ca4adf
* NEWS: Update. * libguile/threads.c (scm_i_init_thread_for_guile): When the thread is already guilified, update `t->base' so that it corresponds to the new stack base. Bug report and patch by Linas Vepstas <linasvepstas@gmail.com>. * test-suite/standalone/Makefile.am (test_scm_with_guile_CFLAGS, test_scm_with_guile_LDADD): New. (check_PROGRAMS, TESTS): Add `test-scm-with-guile'.
66 lines
2 KiB
C
66 lines
2 KiB
C
/* Copyright (C) 2008 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 2.1 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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*/
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/* Test whether `scm_with_guile ()' can be called several times from a given
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thread, but from a different stack depth. Up to 1.8.5, `scm_with_guile
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()' would not update the thread's `base' field, which would then confuse
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the GC.
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See http://lists.gnu.org/archive/html/guile-devel/2008-11/msg00037.html
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for a detailed report. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <libguile.h>
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static void *
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entry_point (void *arg)
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{
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/* Invoke the GC. If `THREAD->base' is incorrect, then Guile will just
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segfault somewhere in `scm_mark_locations ()'. */
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scm_gc ();
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return NULL;
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}
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static void
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go_deeper_into_the_stack (unsigned level)
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{
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/* The assumption is that the compiler is not smart enough to optimize this
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out. */
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if (level > 0)
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go_deeper_into_the_stack (level - 1);
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else
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scm_with_guile (entry_point, NULL);
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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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/* Invoke `scm_with_guile ()' from someplace deep into the stack. */
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go_deeper_into_the_stack (100);
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/* Invoke it from much higher into the stack. This time, Guile is expected
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to update the `base' field of the current thread. */
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scm_with_guile (entry_point, NULL);
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return 0;
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}
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