From: Dmitry V. Levin Date: Fri, 26 May 2017 20:42:13 +0000 (+0000) Subject: tests: check decoding of signal syscall X-Git-Tag: v4.18~163 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ea64209ef76e87ae0877730d8033f324561707e2;p=strace tests: check decoding of signal syscall * tests/signal.c: New file. * tests/gen_tests.in (signal): New entry. * tests/pure_executables.list: Add signal. * tests/.gitignore: Likewise. --- diff --git a/tests/.gitignore b/tests/.gitignore index babd9493..aa2d5d8e 100644 --- a/tests/.gitignore +++ b/tests/.gitignore @@ -326,6 +326,7 @@ shutdown sigaction sigaltstack siginfo +signal signal_receive signalfd4 sigreturn diff --git a/tests/gen_tests.in b/tests/gen_tests.in index be0a3a23..ad5fdd74 100644 --- a/tests/gen_tests.in +++ b/tests/gen_tests.in @@ -281,6 +281,7 @@ setuid32 -a12 shmxt -a11 -e trace='/(osf_)?shmat,shmdt' shutdown -a24 siginfo -e trace=none +signal -a25 -e signal=none -e trace='/^signal$' signal_receive -a16 -e trace=kill signalfd4 sigreturn -esignal='!USR1' diff --git a/tests/pure_executables.list b/tests/pure_executables.list index cc65614a..3b0fbeb3 100755 --- a/tests/pure_executables.list +++ b/tests/pure_executables.list @@ -269,6 +269,7 @@ shutdown sigaction sigaltstack siginfo +signal signalfd4 sigreturn sigsuspend diff --git a/tests/signal.c b/tests/signal.c new file mode 100644 index 00000000..edbc3d2d --- /dev/null +++ b/tests/signal.c @@ -0,0 +1,132 @@ +/* + * Check decoding of signal syscall. + * + * Copyright (c) 2017 Dmitry V. Levin + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "tests.h" +#include + +#ifdef __NR_signal + +# include +# include +# include +# include +# include +# include + +static long +k_signal(const kernel_ulong_t signum, const kernel_ulong_t handler) +{ + return syscall(__NR_signal, signum, handler); +} + +int +main(void) +{ + static const uintptr_t sig_ign = (uintptr_t) SIG_IGN; + static const uintptr_t sig_dfl = (uintptr_t) SIG_DFL; + static const kernel_ulong_t sigusr1 = + (kernel_ulong_t) 0xfacefeed00000000ULL | SIGUSR1; + static const struct sigaction act = { .sa_handler = SIG_DFL }; + long rc; + + sigset_t mask; + sigemptyset(&mask); + sigaddset(&mask, SIGUSR1); + if (sigprocmask(SIG_BLOCK, &mask, NULL)) + perror_msg_and_fail("sigprocmask SIG_BLOCK"); + + if (sigaction(SIGUSR1, &act, NULL)) + perror_msg_and_fail("sigaction"); + + rc = k_signal(sigusr1, sig_ign); + + if (rc == -1L) { + printf("signal(SIGUSR1, SIG_IGN) = %s\n", sprintrc(rc)); + } else if (rc != (long) sig_dfl) { + error_msg_and_fail("signal(SIGUSR1, SIG_IGN) = %#lx\n", rc); + } else { + printf("signal(SIGUSR1, SIG_IGN) = %#lx (SIG_DFL)\n", rc); + + /* + * Raise and unblock SIGUSR1. + * If signal syscall failed to set SIGUSR1 handler to SIG_IGN, + * the process will be terminated by SIGUSR1. + */ + raise(SIGUSR1); + if (sigprocmask(SIG_UNBLOCK, &mask, NULL)) + perror_msg_and_fail("sigprocmask SIG_UNBLOCK"); + + if (sigprocmask(SIG_BLOCK, &mask, NULL)) + perror_msg_and_fail("sigprocmask SIG_BLOCK"); + } + + rc = k_signal(SIGUSR1, sig_dfl); + + if (rc == -1L) { + printf("signal(SIGUSR1, SIG_DFL) = %s\n", sprintrc(rc)); + } else if (rc != (long) sig_ign) { + error_msg_and_fail("signal(SIGUSR1, SIG_DFL) = %#lx\n", rc); + } else { + printf("signal(SIGUSR1, SIG_DFL) = %#lx (SIG_IGN)\n", rc); + } + + const kernel_ulong_t addr = (kernel_ulong_t) 0xfacefeeddeadbeefULL; + rc = k_signal(SIGUSR1, addr); + + if (rc == -1L) { + printf("signal(SIGUSR1, %#llx) = %s\n", + (unsigned long long) addr, sprintrc(rc)); + } else if (rc != (long) sig_dfl) { + error_msg_and_fail("signal(SIGUSR1, %#llx) = %#lx\n", + (unsigned long long) addr, rc); + } else { + printf("signal(SIGUSR1, %#llx) = %#lx (SIG_DFL)\n", + (unsigned long long) addr, rc); + } + + rc = k_signal(SIGUSR1, sig_ign); + + if (rc == -1L) { + printf("signal(SIGUSR1, SIG_IGN) = %s\n", sprintrc(rc)); + } else { + printf("signal(SIGUSR1, SIG_IGN) = %#lx\n", rc); + } + + rc = k_signal(addr, sig_ign); + printf("signal(%d, SIG_IGN) = %s\n", (int) addr, sprintrc(rc)); + + puts("+++ exited with 0 +++"); + return 0; +} + +#else + +SKIP_MAIN_UNDEFINED("__NR_signal") + +#endif