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Diffstat (limited to 'test/syscalls/linux/sigprocmask.cc')
| -rw-r--r-- | test/syscalls/linux/sigprocmask.cc | 269 |
1 files changed, 0 insertions, 269 deletions
diff --git a/test/syscalls/linux/sigprocmask.cc b/test/syscalls/linux/sigprocmask.cc deleted file mode 100644 index a603fc1d1..000000000 --- a/test/syscalls/linux/sigprocmask.cc +++ /dev/null @@ -1,269 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include <signal.h> -#include <stddef.h> -#include <sys/syscall.h> -#include <unistd.h> - -#include "gtest/gtest.h" -#include "test/util/signal_util.h" -#include "test/util/test_util.h" - -namespace gvisor { -namespace testing { - -namespace { - -// Signals numbers used for testing. -static constexpr int kTestSignal1 = SIGUSR1; -static constexpr int kTestSignal2 = SIGUSR2; - -static int raw_sigprocmask(int how, const sigset_t* set, sigset_t* oldset) { - return syscall(SYS_rt_sigprocmask, how, set, oldset, _NSIG / 8); -} - -// count of the number of signals received -int signal_count[kMaxSignal + 1]; - -// signal handler increments the signal counter -void SigHandler(int sig, siginfo_t* info, void* context) { - TEST_CHECK(sig > 0 && sig <= kMaxSignal); - signal_count[sig] += 1; -} - -// The test fixture saves and restores the signal mask and -// sets up handlers for kTestSignal1 and kTestSignal2. -class SigProcMaskTest : public ::testing::Test { - protected: - void SetUp() override { - // Save the current signal mask. - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, nullptr, &mask_), - SyscallSucceeds()); - - // Setup signal handlers for kTestSignal1 and kTestSignal2. - struct sigaction sa; - sa.sa_sigaction = SigHandler; - sigfillset(&sa.sa_mask); - sa.sa_flags = SA_SIGINFO; - EXPECT_THAT(sigaction(kTestSignal1, &sa, &sa_test_sig_1_), - SyscallSucceeds()); - EXPECT_THAT(sigaction(kTestSignal2, &sa, &sa_test_sig_2_), - SyscallSucceeds()); - - // Clear the signal counters. - memset(signal_count, 0, sizeof(signal_count)); - } - - void TearDown() override { - // Restore the signal mask. - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, &mask_, nullptr), - SyscallSucceeds()); - - // Restore the signal handlers for kTestSignal1 and kTestSignal2. - EXPECT_THAT(sigaction(kTestSignal1, &sa_test_sig_1_, nullptr), - SyscallSucceeds()); - EXPECT_THAT(sigaction(kTestSignal2, &sa_test_sig_2_, nullptr), - SyscallSucceeds()); - } - - private: - sigset_t mask_; - struct sigaction sa_test_sig_1_; - struct sigaction sa_test_sig_2_; -}; - -// Both sigsets nullptr should succeed and do nothing. -TEST_F(SigProcMaskTest, NullAddress) { - EXPECT_THAT(raw_sigprocmask(SIG_BLOCK, nullptr, NULL), SyscallSucceeds()); - EXPECT_THAT(raw_sigprocmask(SIG_UNBLOCK, nullptr, NULL), SyscallSucceeds()); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, nullptr, NULL), SyscallSucceeds()); -} - -// Bad address for either sigset should fail with EFAULT. -TEST_F(SigProcMaskTest, BadAddress) { - sigset_t* bad_addr = reinterpret_cast<sigset_t*>(-1); - - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, bad_addr, nullptr), - SyscallFailsWithErrno(EFAULT)); - - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, nullptr, bad_addr), - SyscallFailsWithErrno(EFAULT)); -} - -// Bad value of the "how" parameter should fail with EINVAL. -TEST_F(SigProcMaskTest, BadParameter) { - int bad_param_1 = -1; - int bad_param_2 = 42; - - sigset_t set1; - sigemptyset(&set1); - - EXPECT_THAT(raw_sigprocmask(bad_param_1, &set1, nullptr), - SyscallFailsWithErrno(EINVAL)); - - EXPECT_THAT(raw_sigprocmask(bad_param_2, &set1, nullptr), - SyscallFailsWithErrno(EINVAL)); -} - -// Check that we can get the current signal mask. -TEST_F(SigProcMaskTest, GetMask) { - sigset_t set1; - sigset_t set2; - - sigemptyset(&set1); - sigfillset(&set2); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, nullptr, &set1), SyscallSucceeds()); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, nullptr, &set2), SyscallSucceeds()); - EXPECT_THAT(set1, EqualsSigset(set2)); -} - -// Check that we can set the signal mask. -TEST_F(SigProcMaskTest, SetMask) { - sigset_t actual; - sigset_t expected; - - // Try to mask all signals - sigfillset(&expected); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, &expected, nullptr), - SyscallSucceeds()); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, nullptr, &actual), - SyscallSucceeds()); - // sigprocmask() should have silently ignored SIGKILL and SIGSTOP. - sigdelset(&expected, SIGSTOP); - sigdelset(&expected, SIGKILL); - EXPECT_THAT(actual, EqualsSigset(expected)); - - // Try to clear the signal mask - sigemptyset(&expected); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, &expected, nullptr), - SyscallSucceeds()); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, nullptr, &actual), - SyscallSucceeds()); - EXPECT_THAT(actual, EqualsSigset(expected)); - - // Try to set a mask with one signal. - sigemptyset(&expected); - sigaddset(&expected, kTestSignal1); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, &expected, nullptr), - SyscallSucceeds()); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, nullptr, &actual), - SyscallSucceeds()); - EXPECT_THAT(actual, EqualsSigset(expected)); -} - -// Check that we can add and remove signals. -TEST_F(SigProcMaskTest, BlockUnblock) { - sigset_t actual; - sigset_t expected; - - // Try to set a mask with one signal. - sigemptyset(&expected); - sigaddset(&expected, kTestSignal1); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, &expected, nullptr), - SyscallSucceeds()); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, nullptr, &actual), - SyscallSucceeds()); - EXPECT_THAT(actual, EqualsSigset(expected)); - - // Try to add another signal. - sigset_t block; - sigemptyset(&block); - sigaddset(&block, kTestSignal2); - EXPECT_THAT(raw_sigprocmask(SIG_BLOCK, &block, nullptr), SyscallSucceeds()); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, nullptr, &actual), - SyscallSucceeds()); - sigaddset(&expected, kTestSignal2); - EXPECT_THAT(actual, EqualsSigset(expected)); - - // Try to remove a signal. - sigset_t unblock; - sigemptyset(&unblock); - sigaddset(&unblock, kTestSignal1); - EXPECT_THAT(raw_sigprocmask(SIG_UNBLOCK, &unblock, nullptr), - SyscallSucceeds()); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, nullptr, &actual), - SyscallSucceeds()); - sigdelset(&expected, kTestSignal1); - EXPECT_THAT(actual, EqualsSigset(expected)); -} - -// Test that the signal mask actually blocks signals. -TEST_F(SigProcMaskTest, SignalHandler) { - sigset_t mask; - - // clear the signal mask - sigemptyset(&mask); - EXPECT_THAT(raw_sigprocmask(SIG_SETMASK, &mask, nullptr), SyscallSucceeds()); - - // Check the initial signal counts. - EXPECT_EQ(0, signal_count[kTestSignal1]); - EXPECT_EQ(0, signal_count[kTestSignal2]); - - // Check that both kTestSignal1 and kTestSignal2 are not blocked. - raise(kTestSignal1); - raise(kTestSignal2); - EXPECT_EQ(1, signal_count[kTestSignal1]); - EXPECT_EQ(1, signal_count[kTestSignal2]); - - // Block kTestSignal1. - sigaddset(&mask, kTestSignal1); - EXPECT_THAT(raw_sigprocmask(SIG_BLOCK, &mask, nullptr), SyscallSucceeds()); - - // Check that kTestSignal1 is blocked. - raise(kTestSignal1); - raise(kTestSignal2); - EXPECT_EQ(1, signal_count[kTestSignal1]); - EXPECT_EQ(2, signal_count[kTestSignal2]); - - // Unblock kTestSignal1. - sigaddset(&mask, kTestSignal1); - EXPECT_THAT(raw_sigprocmask(SIG_UNBLOCK, &mask, nullptr), SyscallSucceeds()); - - // Check that the unblocked kTestSignal1 has been delivered. - EXPECT_EQ(2, signal_count[kTestSignal1]); - EXPECT_EQ(2, signal_count[kTestSignal2]); -} - -// Check that sigprocmask correctly handles aliasing of the set and oldset -// pointers. Regression test for b/30502311. -TEST_F(SigProcMaskTest, AliasedSets) { - sigset_t mask; - - // Set a mask in which only kTestSignal1 is blocked. - sigset_t mask1; - sigemptyset(&mask1); - sigaddset(&mask1, kTestSignal1); - mask = mask1; - ASSERT_THAT(raw_sigprocmask(SIG_SETMASK, &mask, nullptr), SyscallSucceeds()); - - // Exchange it with a mask in which only kTestSignal2 is blocked. - sigset_t mask2; - sigemptyset(&mask2); - sigaddset(&mask2, kTestSignal2); - mask = mask2; - ASSERT_THAT(raw_sigprocmask(SIG_SETMASK, &mask, &mask), SyscallSucceeds()); - - // Check that the exchange succeeeded: - // mask should now contain the previously-set mask blocking only kTestSignal1. - EXPECT_THAT(mask, EqualsSigset(mask1)); - // The current mask should block only kTestSignal2. - ASSERT_THAT(raw_sigprocmask(0, nullptr, &mask), SyscallSucceeds()); - EXPECT_THAT(mask, EqualsSigset(mask2)); -} - -} // namespace - -} // namespace testing -} // namespace gvisor |