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/* $NetBSD: t_ptrace_siginfo_wait.h,v 1.1 2020/05/05 00:57:34 kamil Exp $ */
/*-
* Copyright (c) 2016, 2017, 2018, 2019, 2020 The NetBSD Foundation, Inc.
* 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.
*/
static void
ptrace_siginfo(bool faked, void (*sah)(int a, siginfo_t *b, void *c), int *signal_caught)
{
const int exitval = 5;
const int sigval = SIGINT;
const int sigfaked = SIGTRAP;
const int sicodefaked = TRAP_BRKPT;
pid_t child, wpid;
struct sigaction sa;
#if defined(TWAIT_HAVE_STATUS)
int status;
#endif
struct ptrace_siginfo info;
memset(&info, 0, sizeof(info));
DPRINTF("Before forking process PID=%d\n", getpid());
SYSCALL_REQUIRE((child = fork()) != -1);
if (child == 0) {
DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid());
FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
sa.sa_sigaction = sah;
sa.sa_flags = SA_SIGINFO;
sigemptyset(&sa.sa_mask);
FORKEE_ASSERT(sigaction(faked ? sigfaked : sigval, &sa, NULL)
!= -1);
DPRINTF("Before raising %s from child\n", strsignal(sigval));
FORKEE_ASSERT(raise(sigval) == 0);
FORKEE_ASSERT_EQ(*signal_caught, 1);
DPRINTF("Before exiting of the child process\n");
_exit(exitval);
}
DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child);
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
validate_status_stopped(status, sigval);
DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO for child\n");
SYSCALL_REQUIRE(
ptrace(PT_GET_SIGINFO, child, &info, sizeof(info)) != -1);
DPRINTF("Signal traced to lwpid=%d\n", info.psi_lwpid);
DPRINTF("Signal properties: si_signo=%#x si_code=%#x si_errno=%#x\n",
info.psi_siginfo.si_signo, info.psi_siginfo.si_code,
info.psi_siginfo.si_errno);
if (faked) {
DPRINTF("Before setting new faked signal to signo=%d "
"si_code=%d\n", sigfaked, sicodefaked);
info.psi_siginfo.si_signo = sigfaked;
info.psi_siginfo.si_code = sicodefaked;
}
DPRINTF("Before calling ptrace(2) with PT_SET_SIGINFO for child\n");
SYSCALL_REQUIRE(
ptrace(PT_SET_SIGINFO, child, &info, sizeof(info)) != -1);
if (faked) {
DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO for "
"child\n");
SYSCALL_REQUIRE(ptrace(PT_GET_SIGINFO, child, &info,
sizeof(info)) != -1);
DPRINTF("Before checking siginfo_t\n");
ATF_REQUIRE_EQ(info.psi_siginfo.si_signo, sigfaked);
ATF_REQUIRE_EQ(info.psi_siginfo.si_code, sicodefaked);
}
DPRINTF("Before resuming the child process where it left off and "
"without signal to be sent\n");
SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1,
faked ? sigfaked : sigval) != -1);
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
validate_status_exited(status, exitval);
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
}
#define PTRACE_SIGINFO(test, faked) \
ATF_TC(test); \
ATF_TC_HEAD(test, tc) \
{ \
atf_tc_set_md_var(tc, "descr", \
"Verify basic PT_GET_SIGINFO and PT_SET_SIGINFO calls" \
"with%s setting signal to new value", faked ? "" : "out"); \
} \
\
static int test##_caught = 0; \
\
static void \
test##_sighandler(int sig, siginfo_t *info, void *ctx) \
{ \
if (faked) { \
FORKEE_ASSERT_EQ(sig, SIGTRAP); \
FORKEE_ASSERT_EQ(info->si_signo, SIGTRAP); \
FORKEE_ASSERT_EQ(info->si_code, TRAP_BRKPT); \
} else { \
FORKEE_ASSERT_EQ(sig, SIGINT); \
FORKEE_ASSERT_EQ(info->si_signo, SIGINT); \
FORKEE_ASSERT_EQ(info->si_code, SI_LWP); \
} \
\
++ test##_caught; \
} \
\
ATF_TC_BODY(test, tc) \
{ \
\
ptrace_siginfo(faked, test##_sighandler, & test##_caught); \
}
PTRACE_SIGINFO(siginfo_set_unmodified, false)
PTRACE_SIGINFO(siginfo_set_faked, true)
#define ATF_TP_ADD_TCS_PTRACE_WAIT_SIGINFO() \
ATF_TP_ADD_TC(tp, siginfo_set_unmodified); \
ATF_TP_ADD_TC(tp, siginfo_set_faked);
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