diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | posix/Makefile | 2 | ||||
| -rw-r--r-- | posix/test-errno.c | 153 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/Makefile | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/test-errno.c | 142 |
5 files changed, 305 insertions, 2 deletions
@@ -1,3 +1,11 @@ +2017-03-08 Yury Norov <ynorov@caviumnetworks.com> + Zack Weinberg <zackw@panix.com> + + * posix/test-errno.c: New file. + * posix/Makefile (tests): Add test-errno. + * sysdeps/unix/sysv/linux/test-errno.c: New file. + * sysdeps/unix/sysv/linux/Makefile (tests): Add test-errno. + 2017-03-08 Stefan Liebler <stli@linux.vnet.ibm.com> * sysdeps/s390/fpu/libm-test-ulps: Regenerated. diff --git a/posix/Makefile b/posix/Makefile index 8f23d64..ae17646 100644 --- a/posix/Makefile +++ b/posix/Makefile @@ -62,7 +62,7 @@ routines := \ get_child_max sched_cpucount sched_cpualloc sched_cpufree aux := init-posix environ -tests := tstgetopt testfnm runtests runptests \ +tests := test-errno tstgetopt testfnm runtests runptests \ tst-preadwrite tst-preadwrite64 test-vfork regexbug1 \ tst-mmap tst-mmap-offset tst-getaddrinfo tst-truncate \ tst-truncate64 tst-fork tst-fnmatch tst-regexloc tst-dir \ diff --git a/posix/test-errno.c b/posix/test-errno.c new file mode 100644 index 0000000..98df344 --- /dev/null +++ b/posix/test-errno.c @@ -0,0 +1,153 @@ +/* Test that failing system calls do set errno to the correct value. + + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <limits.h> +#include <grp.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> +#include <sys/ioctl.h> +#include <sys/socket.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <sys/resource.h> +#include <sys/types.h> +#include <sys/statfs.h> +#include <sys/mman.h> +#include <unistd.h> +#include <netinet/in.h> + +/* This is not an exhaustive test: only system calls that can be + persuaded to fail with a consistent error code and no side effects + are included. Usually these are failures due to invalid arguments, + with errno code EBADF or EINVAL. The order of argument checks is + unspecified, so we must take care to provide arguments that only + allow _one_ failure mode. + + Note that all system calls that can fail with EFAULT are permitted + to deliver a SIGSEGV signal instead, so we avoid supplying invalid + pointers in general, and we do not attempt to test system calls + that can only fail with EFAULT (e.g. gettimeofday, gethostname). + + Also note that root-only system calls (e.g. acct, reboot) may, when + the test is run as an unprivileged user, fail due to insufficient + privileges before bothering to do argument checks, so those are not + tested either. + + Also, system calls that take enum or a set of flags as argument is + not tested if POSIX doesn't specify exact binary values for all + flags, and so any value passed to flags may become valid. + + Some tests assume "/bin/sh" names a file that exists and is not a + directory. */ + +#define test_wrp_rv(rtype, prtype, experr, syscall, ...) \ + (__extension__ ({ \ + errno = 0xdead; \ + rtype ret = syscall (__VA_ARGS__); \ + int err = errno; \ + int fail; \ + if (ret == (rtype) -1 && err == experr) \ + fail = 0; \ + else \ + { \ + fail = 1; \ + if (ret != (rtype) -1) \ + printf ("FAIL: " #syscall ": didn't fail as expected" \ + " (return "prtype")\n", ret); \ + else if (err == 0xdead) \ + puts("FAIL: " #syscall ": didn't update errno\n"); \ + else if (err != experr) \ + printf ("FAIL: " #syscall \ + ": errno is: %d (%s) expected: %d (%s)\n", \ + err, strerror (err), experr, strerror (experr)); \ + } \ + fail; \ + })) + +#define test_wrp(experr, syscall, ...) \ + test_wrp_rv(int, "%d", experr, syscall, __VA_ARGS__) + +static int +do_test (void) +{ + size_t pagesize = sysconf (_SC_PAGESIZE); + struct statfs sfs; + struct sockaddr sa; + socklen_t sl; + char buf[1]; + struct iovec iov[1] = { { buf, 1 } }; + struct sockaddr_in sin; + sin.sin_family = AF_INET; + sin.sin_port = htons (1026); + sin.sin_addr.s_addr = htonl (INADDR_LOOPBACK); + struct msghdr msg; + memset(&msg, 0, sizeof msg); + msg.msg_iov = iov; + msg.msg_iovlen = 1; + + int fails = 0; + fails |= test_wrp (EBADF, accept, -1, &sa, &sl); + fails |= test_wrp (EINVAL, access, "/", -1); + fails |= test_wrp (EBADF, bind, -1, (struct sockaddr *)&sin, sizeof sin); + fails |= test_wrp (ENOTDIR, chdir, "/bin/sh"); + fails |= test_wrp (EBADF, close, -1); + fails |= test_wrp (EBADF, connect, -1, (struct sockaddr *)&sin, sizeof sin); + fails |= test_wrp (EBADF, dup, -1); + fails |= test_wrp (EBADF, dup2, -1, -1); + fails |= test_wrp (EBADF, fchdir, -1); + fails |= test_wrp (EBADF, fchmod, -1, 0); + fails |= test_wrp (EBADF, fcntl, -1, 0); + fails |= test_wrp (EBADF, fstatfs, -1, &sfs); + fails |= test_wrp (EBADF, fsync, -1); + fails |= test_wrp (EBADF, ftruncate, -1, 0); + fails |= test_wrp (EINVAL, getgroups, -1, 0); + fails |= test_wrp (EBADF, getpeername, -1, &sa, &sl); + fails |= test_wrp (EBADF, getsockname, -1, &sa, &sl); + fails |= test_wrp (EBADF, getsockopt, -1, 0, 0, buf, &sl); + fails |= test_wrp (EBADF, ioctl, -1, TIOCNOTTY); + fails |= test_wrp (EBADF, listen, -1, 1); + fails |= test_wrp (EBADF, lseek, -1, 0, 0); + fails |= test_wrp (EINVAL, madvise, (void *) -1, -1, 0); + fails |= test_wrp_rv (void *, "%p", EBADF, + mmap, 0, pagesize, PROT_READ, MAP_PRIVATE, -1, 0); + fails |= test_wrp (EINVAL, mprotect, (void *) -1, pagesize, -1); + fails |= test_wrp (EINVAL, msync, (void *) -1, pagesize, -1); + fails |= test_wrp (EINVAL, munmap, (void *) -1, 0); + fails |= test_wrp (EINVAL, open, "/bin/sh", -1, 0); + fails |= test_wrp (EBADF, read, -1, buf, 1); + fails |= test_wrp (EINVAL, readlink, "/", buf, -1); + fails |= test_wrp (EBADF, readv, -1, iov, 1); + fails |= test_wrp (EBADF, recv, -1, buf, 1, 0); + fails |= test_wrp (EBADF, recvfrom, -1, buf, 1, 0, &sa, &sl); + fails |= test_wrp (EBADF, recvmsg, -1, &msg, 0); + fails |= test_wrp (EINVAL, select, -1, 0, 0, 0, 0); + fails |= test_wrp (EBADF, send, -1, buf, 1, 0); + fails |= test_wrp (EBADF, sendmsg, -1, &msg, 0); + fails |= test_wrp (EBADF, sendto, -1, buf, 1, 0, &sa, sl); + fails |= test_wrp (EBADF, setsockopt, -1, 0, 0, buf, sl); + fails |= test_wrp (EBADF, shutdown, -1, SHUT_RD); + fails |= test_wrp (EBADF, write, -1, "Hello", sizeof ("Hello") ); + fails |= test_wrp (EBADF, writev, -1, iov, 1 ); + + return fails; +} + +#include "support/test-driver.c" diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile index fc29c54..6b7aa3f 100644 --- a/sysdeps/unix/sysv/linux/Makefile +++ b/sysdeps/unix/sysv/linux/Makefile @@ -43,7 +43,7 @@ sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \ bits/mman-linux.h tests += tst-clone tst-clone2 tst-fanotify tst-personality tst-quota \ - tst-sync_file_range + tst-sync_file_range test-errno # Generate the list of SYS_* macros for the system calls (__NR_* macros). diff --git a/sysdeps/unix/sysv/linux/test-errno.c b/sysdeps/unix/sysv/linux/test-errno.c new file mode 100644 index 0000000..ab3735f --- /dev/null +++ b/sysdeps/unix/sysv/linux/test-errno.c @@ -0,0 +1,142 @@ +/* Test that failing system calls do set errno to the correct value. + + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <fcntl.h> +#include <mqueue.h> +#include <sched.h> +#include <signal.h> +#include <stdio.h> +#include <string.h> +#include <time.h> +#include <unistd.h> +#include <sys/epoll.h> +#include <sys/eventfd.h> +#include <sys/file.h> +#include <sys/fsuid.h> +#include <sys/inotify.h> +#include <sys/mman.h> +#include <sys/poll.h> +#include <sys/quota.h> +#include <sys/resource.h> +#include <sys/select.h> +#include <sys/sendfile.h> +#include <sys/swap.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sys/wait.h> + +/* This is not an exhaustive test: only system calls that can be + persuaded to fail with a consistent error code and no side effects + are included. Usually these are failures due to invalid arguments, + with errno code EBADF or EINVAL. The order of argument checks is + unspecified, so we must take care to provide arguments that only + allow _one_ failure mode. + + Note that all system calls that can fail with EFAULT are permitted + to deliver a SIGSEGV signal instead, so we avoid supplying invalid + pointers in general, and we do not attempt to test system calls + that can only fail with EFAULT (e.g. gettimeofday, gethostname). + + Also note that root-only system calls (e.g. acct, reboot) may, when + the test is run as an unprivileged user, fail due to insufficient + privileges before bothering to do argument checks, so those are not + tested either. + + Also, system calls that take enum or a set of flags as argument is + not tested if POSIX doesn't specify exact binary values for all + flags, and so any value passed to flags may become valid. + + Some tests assume "/bin/sh" names a file that exists and is not a + directory. */ + +#define test_wrp_rv(rtype, prtype, experr, syscall, ...) \ + (__extension__ ({ \ + errno = 0xdead; \ + rtype ret = syscall (__VA_ARGS__); \ + int err = errno; \ + int fail; \ + if (ret == (rtype) -1 && err == experr) \ + fail = 0; \ + else \ + { \ + fail = 1; \ + if (ret != (rtype) -1) \ + printf ("FAIL: " #syscall ": didn't fail as expected" \ + " (return "prtype")\n", ret); \ + else if (err == 0xdead) \ + puts("FAIL: " #syscall ": didn't update errno\n"); \ + else if (err != experr) \ + printf ("FAIL: " #syscall \ + ": errno is: %d (%s) expected: %d (%s)\n", \ + err, strerror (err), experr, strerror (experr)); \ + } \ + fail; \ + })) + +#define test_wrp(experr, syscall, ...) \ + test_wrp_rv(int, "%d", experr, syscall, __VA_ARGS__) + +static int +do_test (void) +{ + fd_set rs, ws, es; + int status; + off_t off; + stack_t ss; + struct dqblk dqblk; + struct epoll_event epoll_event; + struct pollfd pollfd; + struct sched_param sch_param; + struct timespec ts; + struct timeval tv; + unsigned char vec[16]; + ss.ss_flags = ~SS_DISABLE; + ts.tv_sec = -1; + + int fails = 0; + fails |= test_wrp (EINVAL, epoll_create, -1); + fails |= test_wrp (EINVAL, epoll_create1, EPOLL_CLOEXEC + 1); + fails |= test_wrp (EBADF, epoll_ctl, -1, EPOLL_CTL_ADD, 0, &epoll_event); + fails |= test_wrp (EBADF, epoll_wait, -1, &epoll_event, 1, 1); + fails |= test_wrp (EBADF, fdatasync, -1); + fails |= test_wrp (EBADF, flock, -1, LOCK_SH); + fails |= test_wrp (ESRCH, getpgid, -1); + fails |= test_wrp (EINVAL, inotify_add_watch, -1, "/", 0); + fails |= test_wrp (EINVAL, mincore, (void *) -1, 0, vec); + fails |= test_wrp (EINVAL, mlock, (void *) -1, 1); // different errors + fails |= test_wrp (EINVAL, nanosleep, &ts, &ts); + fails |= test_wrp (EINVAL, poll, &pollfd, -1, 0); + fails |= test_wrp (ENODEV, quotactl, Q_GETINFO, NULL, -1, (caddr_t) &dqblk); + fails |= test_wrp (EINVAL, sched_getparam, -1, &sch_param); + fails |= test_wrp (EINVAL, sched_getscheduler, -1); + fails |= test_wrp (EINVAL, sched_get_priority_max, -1); + fails |= test_wrp (EINVAL, sched_get_priority_min, -1); + fails |= test_wrp (EINVAL, sched_rr_get_interval, -1, &ts); + fails |= test_wrp (EINVAL, sched_setparam, -1, &sch_param); + fails |= test_wrp (EINVAL, sched_setscheduler, -1, 0, &sch_param); + fails |= test_wrp (EINVAL, select, -1, &rs, &ws, &es, &tv); + fails |= test_wrp (EBADF, sendfile, -1, -1, &off, 0); + fails |= test_wrp (EINVAL, sigaltstack, &ss, NULL); + fails |= test_wrp (ECHILD, wait4, -1, &status, 0, NULL); + + return fails; +} + +#include "support/test-driver.c" |