diff options
Diffstat (limited to 'contrib/netbsd-tests/lib/libc/sys/t_swapcontext.c')
| -rw-r--r-- | contrib/netbsd-tests/lib/libc/sys/t_swapcontext.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/lib/libc/sys/t_swapcontext.c b/contrib/netbsd-tests/lib/libc/sys/t_swapcontext.c new file mode 100644 index 000000000000..de36c8807dce --- /dev/null +++ b/contrib/netbsd-tests/lib/libc/sys/t_swapcontext.c @@ -0,0 +1,133 @@ +/* $NetBSD: t_swapcontext.c,v 1.3 2013/05/05 10:28:11 skrll Exp $ */ + +/* + * Copyright (c) 2012 Emmanuel Dreyfus. 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. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <sys/cdefs.h> +__RCSID("$NetBSD"); + +#include <ucontext.h> +#include <stdio.h> +#include <stdlib.h> +#include <lwp.h> + +#include <atf-c.h> + +#define STACKSIZE 65536 + +char stack[STACKSIZE]; +ucontext_t nctx; +ucontext_t octx; +void *otls; +void *ntls; +int val1, val2; +int alter_tlsbase; + +/* ARGSUSED0 */ +static void +swapfunc(void *arg) +{ + ntls = _lwp_getprivate(); + printf("after swapcontext TLS pointer = %p\n", ntls); + + if (alter_tlsbase) { + ATF_REQUIRE_EQ(ntls, &val1); + printf("TLS pointer modified by swapcontext()\n"); + } else { + ATF_REQUIRE_EQ(ntls, &val2); + printf("TLS pointer left untouched by swapcontext()\n"); + } + + /* Go back in main */ + ATF_REQUIRE(swapcontext(&nctx, &octx)); + + /* NOTREACHED */ + return; +} + +static void +mainfunc(void) +{ + printf("Testing if swapcontext() alters TLS pointer if _UC_TLSBASE " + "is %s\n", (alter_tlsbase) ? "left set" : "cleared"); + + _lwp_setprivate(&val1); + printf("before swapcontext TLS pointer = %p\n", &val1); + + ATF_REQUIRE(getcontext(&nctx) == 0); + + nctx.uc_stack.ss_sp = stack; + nctx.uc_stack.ss_size = sizeof(stack); + +#ifndef _UC_TLSBASE + ATF_REQUIRE_MSG(0, "_UC_TLSBASE is not defined"); +#else /* _UC_TLSBASE */ + ATF_REQUIRE(nctx.uc_flags & _UC_TLSBASE); + if (!alter_tlsbase) + nctx.uc_flags &= ~_UC_TLSBASE; +#endif /* _UC_TLSBASE */ + + makecontext(&nctx, swapfunc, 0); + + _lwp_setprivate(&val2); + otls = _lwp_getprivate(); + printf("before swapcontext TLS pointer = %p\n", otls); + ATF_REQUIRE(swapcontext(&octx, &nctx) == 0); + + printf("Test completed\n"); +} + + +ATF_TC(swapcontext1); +ATF_TC_HEAD(swapcontext1, tc) +{ + atf_tc_set_md_var(tc, "descr", "Testing if swapcontext() can let " + "TLS pointer untouched"); +} +ATF_TC_BODY(swapcontext1, tc) +{ + alter_tlsbase = 0; + mainfunc(); +} + +ATF_TC(swapcontext2); +ATF_TC_HEAD(swapcontext2, tc) +{ + atf_tc_set_md_var(tc, "descr", "Testing if swapcontext() can " + "modify TLS pointer"); +} +ATF_TC_BODY(swapcontext2, tc) +{ + alter_tlsbase = 1; + mainfunc(); +} + +ATF_TP_ADD_TCS(tp) +{ + ATF_TP_ADD_TC(tp, swapcontext1); + ATF_TP_ADD_TC(tp, swapcontext2); + + return atf_no_error(); +} |