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Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/tst-clone2.c')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/tst-clone2.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/tst-clone2.c b/REORG.TODO/sysdeps/unix/sysv/linux/tst-clone2.c new file mode 100644 index 0000000000..f53efd505c --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/tst-clone2.c @@ -0,0 +1,146 @@ +/* Test if CLONE_VM does not change pthread pid/tid field (BZ #19957) + Copyright (C) 2016-2017 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 <sched.h> +#include <signal.h> +#include <string.h> +#include <stdio.h> +#include <fcntl.h> +#include <unistd.h> +#include <stddef.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdlib.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <sys/syscall.h> + +#include <stackinfo.h> /* For _STACK_GROWS_{UP,DOWN}. */ + +#include <support/check.h> + +static int sig; +static int pipefd[2]; + +static int +f (void *a) +{ + close (pipefd[0]); + + pid_t ppid = getppid (); + pid_t pid = getpid (); + pid_t tid = syscall (__NR_gettid); + + if (write (pipefd[1], &ppid, sizeof ppid) != sizeof (ppid)) + FAIL_EXIT1 ("write ppid failed\n"); + if (write (pipefd[1], &pid, sizeof pid) != sizeof (pid)) + FAIL_EXIT1 ("write pid failed\n"); + if (write (pipefd[1], &tid, sizeof tid) != sizeof (tid)) + FAIL_EXIT1 ("write tid failed\n"); + + return 0; +} + + +static int +do_test (void) +{ + sig = SIGRTMIN; + sigset_t ss; + sigemptyset (&ss); + sigaddset (&ss, sig); + if (sigprocmask (SIG_BLOCK, &ss, NULL) != 0) + FAIL_EXIT1 ("sigprocmask failed: %m"); + + if (pipe2 (pipefd, O_CLOEXEC)) + FAIL_EXIT1 ("pipe failed: %m"); + + int clone_flags = 0; +#ifdef __ia64__ + extern int __clone2 (int (*__fn) (void *__arg), void *__child_stack_base, + size_t __child_stack_size, int __flags, + void *__arg, ...); + char st[256 * 1024] __attribute__ ((aligned)); + pid_t p = __clone2 (f, st, sizeof (st), clone_flags, 0); +#else + char st[128 * 1024] __attribute__ ((aligned)); +#if _STACK_GROWS_DOWN + pid_t p = clone (f, st + sizeof (st), clone_flags, 0); +#elif _STACK_GROWS_UP + pid_t p = clone (f, st, clone_flags, 0); +#else +#error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP" +#endif +#endif + + close (pipefd[1]); + + if (p == -1) + FAIL_EXIT1("clone failed: %m"); + + pid_t ppid, pid, tid; + if (read (pipefd[0], &ppid, sizeof pid) != sizeof pid) + { + kill (p, SIGKILL); + FAIL_EXIT1 ("read ppid failed: %m"); + } + if (read (pipefd[0], &pid, sizeof pid) != sizeof pid) + { + kill (p, SIGKILL); + FAIL_EXIT1 ("read pid failed: %m"); + } + if (read (pipefd[0], &tid, sizeof tid) != sizeof tid) + { + kill (p, SIGKILL); + FAIL_EXIT1 ("read tid failed: %m"); + } + + close (pipefd[0]); + + int ret = 0; + + pid_t own_pid = getpid (); + pid_t own_tid = syscall (__NR_gettid); + + /* Some sanity checks for clone syscall: returned ppid should be current + pid and both returned tid/pid should be different from current one. */ + if ((ppid != own_pid) || (pid == own_pid) || (tid == own_tid)) + FAIL_RET ("ppid=%i pid=%i tid=%i | own_pid=%i own_tid=%i", + (int)ppid, (int)pid, (int)tid, (int)own_pid, (int)own_tid); + + int e; + if (waitpid (p, &e, __WCLONE) != p) + { + kill (p, SIGKILL); + FAIL_EXIT1 ("waitpid failed"); + } + if (!WIFEXITED (e)) + { + if (WIFSIGNALED (e)) + printf ("died from signal %s\n", strsignal (WTERMSIG (e))); + else + puts ("did not terminate correctly"); + exit (EXIT_FAILURE); + } + if (WEXITSTATUS (e) != 0) + FAIL_EXIT1 ("exit code %d", WEXITSTATUS (e)); + + return ret; +} + +#include <support/test-driver.c> |