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/*===========================================================================
* Filename : test-gc.c
* About : garbage collector test
*
* Copyright (C) 2006 Jun Inoue <jun.lambda@gmail.com>
* Copyright (c) 2007-2008 SigScheme Project <uim-en AT googlegroups.com>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of authors nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
* IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
===========================================================================*/
#include <sigscheme/config.h>
#if !(SCM_USE_STORAGE_COMPACT || SCM_USE_STORAGE_FATTY)
#define TST_EXCLUDE_THIS
#endif
#include "sscm-test.h"
#include "sigscheme.h"
#include "sigschemeinternal.h"
#define HEAP_SIZE SCM_DEFAULT_HEAP_SIZE
void saturate_heap(size_t heap_size);
ScmObj alloc (TST_PARAMS_DECL);
void verify (ScmObj obj, TST_PARAMS_DECL);
void
saturate_heap (size_t size)
{
/* We overallocate objects to force the GC to kick in. This is
* problematic if the new objects occupy cells that were
* inadvertently freed due to a bug in GC. To guard against that
* possibility, we allocate closures (which the caller doesn't use
* by convention) so that type predicates that the caller will do
* on its objects won't accidentally succeed. */
while (size--)
SCM_MAKE_CLOSURE(SCM_NULL, SCM_NULL);
}
ScmObj
alloc (TST_PARAMS_DECL)
{
return CONS(LIST_1(MAKE_INT(1)), scm_intern("aaa"));
}
#define TST(cond) TST_COND(cond, #cond)
void
verify (ScmObj obj, TST_PARAMS_DECL)
{
TST_ASSERT(TST(CONSP(obj)));
TST_ASSERT(TST(SYMBOLP(CDR(obj))));
obj = CAR(obj);
TST_ASSERT(TST(CONSP(obj)));
TST_ASSERT(TST(NULLP(CDR(obj))));
TST_ASSERT(TST(INTP(CAR(obj))));
TST_ASSERT(TST_COND(EQVP(CAR(obj), MAKE_INT(1)),
"integer=? after GC"));
}
#define ALLOC() alloc(TST_PARAMS)
#define VERIFY(o) verify((o), TST_PARAMS)
#define TEST(o) \
do { \
/* We run it twice to see if the contents of the stack makes a */ \
/* difference. */ \
saturate_heap (HEAP_SIZE); \
VERIFY(o); \
saturate_heap (HEAP_SIZE); \
VERIFY(o); \
} while (0)
TST_CASE("GC mark stack")
{
ScmObj obj;
obj = ALLOC ();
TEST (obj);
}
TST_CASE("GC mark protected var")
{
ScmObj *var;
var = malloc (sizeof (*var));
scm_gc_protect (var);
*var = ALLOC ();
TEST (*var);
scm_gc_unprotect (var);
free (var);
}
volatile scm_intobj_t false_ptr;
TST_CASE("GC pointer predicate false positives")
{
ScmObj obj;
size_t i;
obj = ALLOC ();
false_ptr = (scm_intobj_t)obj;
for (i = 0; i < sizeof (ScmCell); i++) {
++false_ptr;
TEST(obj);
}
}
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