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#line 1 "test-gc-protect-stack.c"
/*===========================================================================
* Filename : test-gc-protect-stack.c
* About : unit test for scm_gc_protect_stack()
*
* Copyright (C) 2006 YAMAMOTO Kengo <yamaken AT bp.iij4u.or.jp>
* 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.
===========================================================================*/
#if 1
/* Since introduction of libgcroots to SigScheme, the GC protection interfaces
* are withdrawn. These tests does not make sense now. -- YamaKen 2006-12-23 */
#define TST_EXCLUDE_THIS
#endif
#define TST_HAVE_MAIN 1
#include "sscm-test.h"
#ifndef TST_EXCLUDE_THIS
#include <stddef.h>
#include <sigscheme/sigscheme.h>
#define SCMOBJ_ALIGNEDP(ptr) (!((uintptr_t)(ptr) % sizeof(ScmObj)))
#define TEST_STACK_START(protected, actual) \
if (stack_dir == STACK_GROWS_DOWNWARDS) { \
TST_TN_TRUE(actual <= protected); \
} else { \
TST_TN_TRUE(actual >= protected); \
}
enum stack_growth_dir {
STACK_GROWS_DOWNWARDS,
STACK_GROWS_UPWARDS
};
static enum stack_growth_dir stack_dir;
static void *volatile stack_start_protected;
static void *volatile stack_start_actual;
static void (*volatile fvv_internal)(void);
static int (*volatile fiv_internal)(void);
static void (*volatile fvi_internal)(int);
static int (*volatile fii_internal)(int);
static ScmObj *(*volatile fspsp_internal)(ScmObj *dummy);
static ScmObj *(*volatile fspsp2_internal)(ScmObj *dummy);
static enum stack_growth_dir probe_stack_growth_dir(void);
static enum stack_growth_dir probe_stack_growth_dir2(void *upper_frame);
static void fvv(void);
static int fiv(void);
static void fvi(int dummy);
static int fii(int dummy);
static ScmObj *fspsp(ScmObj *dummy);
static ScmObj *fspsp2(ScmObj *dummy);
static enum stack_growth_dir
probe_stack_growth_dir(void)
{
int stack_start;
return probe_stack_growth_dir2(&stack_start);
}
static enum stack_growth_dir
probe_stack_growth_dir2(void *upper_frame)
{
int stack_start;
if ((void *)&stack_start < upper_frame)
return STACK_GROWS_DOWNWARDS;
else
return STACK_GROWS_UPWARDS;
}
static void
fvv(void)
{
ScmObj stack_start;
stack_start_actual = &stack_start;
}
static int
fiv(void)
{
ScmObj stack_start;
stack_start_actual = &stack_start;
return 0;
}
static void
fvi(int dummy)
{
ScmObj stack_start;
stack_start_actual = &stack_start;
}
static int
fii(int dummy)
{
ScmObj stack_start;
stack_start_actual = &stack_start;
return 0;
}
static ScmObj *
fspsp(ScmObj *dummy)
{
ScmObj stack_start;
stack_start_actual = &stack_start;
return dummy;
}
/* simulates scm_gc_protect_stack_internal() */
static ScmObj *
fspsp2(ScmObj *designated_stack_start)
{
ScmObj stack_start;
if (!designated_stack_start)
designated_stack_start = &stack_start;
stack_start_actual = designated_stack_start;
/* enabling this fragment on --enable-debug configuration offsets stack
* pointer */
#if 1
SCM_ASSERT(SCMOBJ_ALIGNEDP(stack_start_actual));
#endif
/* may intentionally be an invalidated local address */
return designated_stack_start;
}
int
main(int argc, char **argv)
{
tst_suite_info suite = TST_DEFAULT_SUITE_SETUP;
const char *my_argv[] = {
"dummy",
"--system-load-path", TST_SCM_SYSTEM_LOAD_PATH,
NULL
};
scm_initialize(NULL, my_argv);
stack_dir = probe_stack_growth_dir();
fvv_internal = fvv;
fiv_internal = fiv;
fvi_internal = fvi;
fii_internal = fii;
fspsp_internal = fspsp;
fspsp2_internal = fspsp2;
tst_main(&suite);
scm_finalize();
TST_DEFAULT_SUITE_CLEANUP(suite);
return !!suite.stats.fail;
}
TST_CASE(tst_1, "void (*)(void)")
{
stack_start_protected = scm_gc_current_stack();
scm_gc_protect_stack(stack_start_protected);
(*fvv_internal)();
scm_gc_unprotect_stack(stack_start_protected);
TEST_STACK_START(stack_start_protected, stack_start_actual);
}
TST_CASE(tst_2, "int (*)(void)")
{
stack_start_protected = scm_gc_current_stack();
scm_gc_protect_stack(stack_start_protected);
(*fiv_internal)();
scm_gc_unprotect_stack(stack_start_protected);
TEST_STACK_START(stack_start_protected, stack_start_actual);
}
TST_CASE(tst_3, "void (*)(int)")
{
stack_start_protected = scm_gc_current_stack();
scm_gc_protect_stack(stack_start_protected);
(*fvi_internal)(0);
scm_gc_unprotect_stack(stack_start_protected);
TEST_STACK_START(stack_start_protected, stack_start_actual);
}
TST_CASE(tst_4, "int (*)(int)")
{
stack_start_protected = scm_gc_current_stack();
scm_gc_protect_stack(stack_start_protected);
(*fii_internal)(0);
scm_gc_unprotect_stack(stack_start_protected);
TEST_STACK_START(stack_start_protected, stack_start_actual);
}
TST_CASE(tst_5, "ScmObj *(*)(ScmObj *)")
{
stack_start_protected = scm_gc_current_stack();
scm_gc_protect_stack(stack_start_protected);
(*fspsp_internal)(NULL);
scm_gc_unprotect_stack(stack_start_protected);
TEST_STACK_START(stack_start_protected, stack_start_actual);
}
TST_CASE(tst_6, "ScmObj *(*)(ScmObj *) (2)")
{
stack_start_protected = scm_gc_current_stack();
scm_gc_protect_stack(stack_start_protected);
(*fspsp2_internal)(NULL);
scm_gc_unprotect_stack(stack_start_protected);
TEST_STACK_START(stack_start_protected, stack_start_actual);
}
#endif /* TST_EXCLUDE_THIS */
TST_LIST_BEGIN()
TST_REGISTER(tst_1)
TST_REGISTER(tst_2)
TST_REGISTER(tst_3)
TST_REGISTER(tst_4)
TST_REGISTER(tst_5)
TST_REGISTER(tst_6)
TST_LIST_END()
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