Dmitry V. Levin
6204654329
Check that -f -p attaches and follows all threads of the given pid. * tests/attach-f-p.c: New file. * tests/attach-f-p.test: New test. * tests/.gitignore: Add attach-f-p. * tests/Makefile.am (check_PROGRAMS): Likewise. (attach_f_p_LDADD): New variable. (TESTS): Add attach-f-p.test.
138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
/*
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* This file is part of attach-f-p strace test.
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <assert.h>
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#include <errno.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#define N 3
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typedef union {
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void *ptr;
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pid_t pid;
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} retval_t;
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typedef struct {
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sigset_t set;
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unsigned int no;
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} thread_arg_t;
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static const char text_parent[] = "attach-f-p.test parent";
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static const char *child[N] = {
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"attach-f-p.test child 0",
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"attach-f-p.test child 1",
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"attach-f-p.test child 2"
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};
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static const int sigs[N] = { SIGALRM, SIGUSR1, SIGUSR2 };
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static const struct itimerspec its[N] = {
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{ .it_value.tv_nsec = 500000000 },
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{ .it_value.tv_nsec = 700000000 },
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{ .it_value.tv_nsec = 900000000 },
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};
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static thread_arg_t args[N] = {
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{ .no = 0 },
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{ .no = 1 },
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{ .no = 2 }
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};
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static void *
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thread(void *a)
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{
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thread_arg_t *arg = a;
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int signo;
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errno = sigwait(&arg->set, &signo);
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if (errno)
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perror_msg_and_fail("sigwait");
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assert(chdir(child[arg->no]) == -1);
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retval_t retval = { .pid = syscall(__NR_gettid) };
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return retval.ptr;
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}
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int
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main(void)
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{
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pthread_t t[N];
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unsigned int i;
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for (i = 0; i < N; ++i) {
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sigemptyset(&args[i].set);
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sigaddset(&args[i].set, sigs[i]);
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errno = pthread_sigmask(SIG_BLOCK, &args[i].set, NULL);
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if (errno)
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perror_msg_and_fail("pthread_sigmask");
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}
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for (i = 0; i < N; ++i) {
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struct sigevent sev = {
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.sigev_notify = SIGEV_SIGNAL,
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.sigev_signo = sigs[i]
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};
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timer_t timerid;
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if (timer_create(CLOCK_MONOTONIC, &sev, &timerid))
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perror_msg_and_skip("timer_create");
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if (timer_settime(timerid, 0, &its[i], NULL))
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perror_msg_and_fail("timer_settime");
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errno = pthread_create(&t[i], NULL, thread, (void *) &args[i]);
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if (errno)
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perror_msg_and_fail("pthread_create");
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}
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if (write(3, "\n", 1) != 1)
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perror_msg_and_fail("write");
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for (i = 0; i < N; ++i) {
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retval_t retval;
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errno = pthread_join(t[i], &retval.ptr);
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if (errno)
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perror_msg_and_fail("pthread_join");
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errno = ENOENT;
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printf("%-5d chdir(\"%s\") = -1 ENOENT (%m)\n"
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"%-5d +++ exited with 0 +++\n",
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retval.pid, child[i], retval.pid);
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}
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pid_t pid = getpid();
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assert(chdir(text_parent) == -1);
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printf("%-5d chdir(\"%s\") = -1 ENOENT (%m)\n"
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"%-5d +++ exited with 0 +++\n", pid, text_parent, pid);
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return 0;
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}
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