gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/test/syscalls/linux/base_poll_test.cc (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  #include "test/syscalls/linux/base_poll_test.h"
    16  
    17  #include <sys/syscall.h>
    18  #include <sys/types.h>
    19  #include <syscall.h>
    20  #include <unistd.h>
    21  
    22  #include <memory>
    23  
    24  #include "gtest/gtest.h"
    25  #include "absl/memory/memory.h"
    26  #include "absl/time/clock.h"
    27  #include "absl/time/time.h"
    28  #include "test/util/test_util.h"
    29  
    30  namespace gvisor {
    31  namespace testing {
    32  
    33  static volatile int timer_fired = 0;
    34  static void SigAlarmHandler(int, siginfo_t*, void*) { timer_fired = 1; }
    35  
    36  BasePollTest::BasePollTest() {
    37    // Register our SIGALRM handler, but save the original so we can restore in
    38    // the destructor.
    39    struct sigaction sa = {};
    40    sa.sa_sigaction = SigAlarmHandler;
    41    sigfillset(&sa.sa_mask);
    42    TEST_PCHECK(sigaction(SIGALRM, &sa, &original_alarm_sa_) == 0);
    43  }
    44  
    45  BasePollTest::~BasePollTest() {
    46    ClearTimer();
    47    TEST_PCHECK(sigaction(SIGALRM, &original_alarm_sa_, nullptr) == 0);
    48  }
    49  
    50  void BasePollTest::SetTimer(absl::Duration duration) {
    51    pid_t tgid = getpid();
    52    pid_t tid = gettid();
    53    ClearTimer();
    54  
    55    // Create a new timer thread.
    56    timer_ = std::make_unique<TimerThread>(absl::Now() + duration, tgid, tid);
    57  }
    58  
    59  bool BasePollTest::TimerFired() const { return timer_fired; }
    60  
    61  void BasePollTest::ClearTimer() {
    62    timer_.reset();
    63    timer_fired = 0;
    64  }
    65  
    66  }  // namespace testing
    67  }  // namespace gvisor