Dmitry V. Levin
c6782f144a
strace test suite is now provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details.
110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
/*
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* Check decoding of signal delivery.
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*
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* Copyright (c) 2016-2018 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "tests.h"
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#include <signal.h>
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#include <stdio.h>
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#include <unistd.h>
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static volatile int s_sig, s_code, s_pid, s_uid;
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static void
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handler(int sig, siginfo_t *info, void *ucontext)
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{
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s_sig = info->si_signo;
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s_code = info->si_code;
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s_pid = info->si_pid;
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s_uid = info->si_uid;
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}
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int
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main(void)
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{
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static const char prefix[] = "KERNEL BUG";
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int printed = 0;
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const int pid = getpid();
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const int uid = geteuid();
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for (int sig = 1; sig <= 31; ++sig) {
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if (sig == SIGKILL || sig == SIGSTOP)
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continue;
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sigset_t mask;
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sigemptyset(&mask);
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sigaddset(&mask, sig);
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if (sigprocmask(SIG_UNBLOCK, &mask, NULL))
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perror_msg_and_fail("sigprocmask");
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static const struct sigaction act = {
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.sa_sigaction = handler,
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.sa_flags = SA_SIGINFO
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};
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if (sigaction(sig, &act, NULL))
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perror_msg_and_fail("sigaction: %d", sig);
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if (kill(pid, sig) != 0)
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perror_msg_and_fail("kill: %d", sig);
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#ifdef MPERS_IS_m32
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/*
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* The tracee has received a compat siginfo_t but
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* the tracer has received a native siginfo_t.
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*/
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const int e_sig = sig;
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const int e_pid = pid;
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const int e_uid = uid;
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#else
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/*
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* If the tracee is a native process,
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* then the tracer is also native.
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* If the tracee is a compat process,
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* then the tracer is also compat.
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* Anyway, both the tracee and the tracer
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* have received the same siginfo_t.
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*/
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const int e_sig = s_sig;
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const int e_pid = s_pid;
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const int e_uid = s_uid;
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#endif
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printf("kill(%d, %s) = 0\n", pid, signal2name(sig));
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printf("--- %s {si_signo=%s, si_code=SI_USER, si_pid=%d"
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", si_uid=%d} ---\n",
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signal2name(sig), signal2name(e_sig), e_pid, e_uid);
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if (s_code || sig != s_sig || pid != s_pid || uid != s_uid) {
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/*
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* The kernel has failed to initialize siginfo_t
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* properly. There is nothing that could be done
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* on the strace side to workaround the kernel bug,
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* so just print some useful diagnostics.
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*/
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if (!printed) {
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printed = 1;
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fprintf(stderr, "%s: siginfo_t\n", prefix);
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}
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fprintf(stderr,
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"%s: expected: si_signo=%d, si_code=%d"
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", si_pid=%d, si_uid=%d\n"
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"%s: received: si_signo=%d, si_code=%d"
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", si_pid=%d, si_uid=%d\n",
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prefix, sig, SI_USER, pid, uid,
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prefix, sig, s_code, s_pid, s_uid);
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}
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}
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if (printed) {
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fprintf(stderr, "%s: end of diagnostics\n"
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"*** PLEASE FIX THE KERNEL ***\n", prefix);
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}
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puts("+++ exited with 0 +++");
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return 0;
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}
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