1 //===-- Unittests for sigaction -------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/signal/raise.h" 10 #include "src/signal/sigaction.h" 11 12 #include "test/UnitTest/ErrnoSetterMatcher.h" 13 #include "test/UnitTest/Test.h" 14 15 #include <errno.h> 16 #include <signal.h> 17 18 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails; 19 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds; 20 21 TEST(LlvmLibcSigaction, Invalid) { 22 // -1 is a much larger signal that NSIG, so this should fail. 23 EXPECT_THAT(LIBC_NAMESPACE::sigaction(-1, nullptr, nullptr), Fails(EINVAL)); 24 } 25 26 // SIGKILL cannot have its action changed, but it can be examined. 27 TEST(LlvmLibcSigaction, Sigkill) { 28 struct sigaction action; 29 EXPECT_THAT(LIBC_NAMESPACE::sigaction(SIGKILL, nullptr, &action), Succeeds()); 30 EXPECT_THAT(LIBC_NAMESPACE::sigaction(SIGKILL, &action, nullptr), 31 Fails(EINVAL)); 32 } 33 34 static int sigusr1Count; 35 static bool correctSignal; 36 37 TEST(LlvmLibcSigaction, CustomAction) { 38 // Zero this incase tests get run multiple times in the future. 39 sigusr1Count = 0; 40 41 struct sigaction action; 42 EXPECT_THAT(LIBC_NAMESPACE::sigaction(SIGUSR1, nullptr, &action), Succeeds()); 43 44 action.sa_handler = +[](int signal) { 45 correctSignal = signal == SIGUSR1; 46 sigusr1Count++; 47 }; 48 EXPECT_THAT(LIBC_NAMESPACE::sigaction(SIGUSR1, &action, nullptr), Succeeds()); 49 50 LIBC_NAMESPACE::raise(SIGUSR1); 51 EXPECT_EQ(sigusr1Count, 1); 52 EXPECT_TRUE(correctSignal); 53 54 action.sa_handler = SIG_DFL; 55 EXPECT_THAT(LIBC_NAMESPACE::sigaction(SIGUSR1, &action, nullptr), Succeeds()); 56 57 EXPECT_DEATH([] { LIBC_NAMESPACE::raise(SIGUSR1); }, WITH_SIGNAL(SIGUSR1)); 58 } 59 60 TEST(LlvmLibcSigaction, Ignore) { 61 struct sigaction action; 62 EXPECT_THAT(LIBC_NAMESPACE::sigaction(SIGUSR1, nullptr, &action), Succeeds()); 63 action.sa_handler = SIG_IGN; 64 EXPECT_THAT(LIBC_NAMESPACE::sigaction(SIGUSR1, &action, nullptr), Succeeds()); 65 66 EXPECT_EXITS([] { LIBC_NAMESPACE::raise(SIGUSR1); }, 0); 67 } 68