kicad/thirdparty/sentry-native/external/third_party/lss/tests/setitimer.c

91 lines
3.6 KiB
C

/* Copyright 2022 Google LLC
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google LLC 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
* OWNER 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "test_skel.h"
int main(int argc, char *argv[]) {
// We need an invalid timer value. The assert()'s below should
// be static asserts but it is not avalible in older C versions.
#define kInvalidTimer 9999
assert(kInvalidTimer != ITIMER_REAL);
assert(kInvalidTimer != ITIMER_VIRTUAL);
assert(kInvalidTimer != ITIMER_PROF);
// Invalid timer returns EINVAL.
assert(sys_setitimer(kInvalidTimer, NULL, NULL) == -1);
assert(errno == EINVAL);
const int kSignal = SIGALRM;
const size_t kSigsetSize = sizeof(struct kernel_sigset_t);
// Block SIGALRM.
struct kernel_sigset_t sigalarm_only;
struct kernel_sigset_t old_sigset;
assert(sys_sigemptyset(&sigalarm_only) == 0);
assert(sys_sigaddset(&sigalarm_only, kSignal) == 0);
assert(sys_rt_sigprocmask(SIG_BLOCK, &sigalarm_only, &old_sigset,
kSigsetSize) == 0);
// Set up a real time timer.
struct kernel_itimerval new_itimer = {};
const long kIntervalUSec = 123;
new_itimer.it_interval.tv_sec = 0;
new_itimer.it_interval.tv_usec = kIntervalUSec;
new_itimer.it_value = new_itimer.it_interval;
assert(sys_setitimer(ITIMER_REAL, &new_itimer, NULL) == 0);
// Wait for alarm.
struct timespec timeout;
const unsigned long kNanoSecsPerSec = 1000000000;
const unsigned long kNanoSecsPerMicroSec = 1000;
// Use a timeout 3 times of the timer interval.
unsigned long duration_ns = kIntervalUSec * kNanoSecsPerMicroSec * 3;
timeout.tv_sec = duration_ns / kNanoSecsPerSec ;
timeout.tv_nsec = duration_ns % kNanoSecsPerSec;
int sig;
do {
sig = sys_sigtimedwait(&sigalarm_only, NULL, &timeout);
} while (sig == -1 && errno == EINTR);
assert(sig == kSignal);
// Disable timer, check saving of old timer value.
struct kernel_itimerval empty_itimer = {};
struct kernel_itimerval old_itimer;
empty_itimer.it_interval.tv_sec = 0;
empty_itimer.it_interval.tv_usec = 0;
empty_itimer.it_value = empty_itimer.it_interval;
assert(sys_setitimer(ITIMER_REAL, &empty_itimer, &old_itimer) == 0);
assert(kernel_timeval_eq(&old_itimer.it_interval, &new_itimer.it_interval));
return 0;
}