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164 lines
4.0 KiB
164 lines
4.0 KiB
/*
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* Test whether process_vm_readv and PTRACE_PEEKDATA work.
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*
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* Copyright (c) 2016-2017 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2017-2018 The strace developers.
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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 <errno.h>
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#include <sys/ptrace.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/uio.h>
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#include <sys/wait.h>
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#include "test_ucopy.h"
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#ifndef HAVE_PROCESS_VM_READV
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# include <asm/unistd.h>
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# include "scno.h"
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static ssize_t
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strace_process_vm_readv(pid_t pid,
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const struct iovec *lvec,
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unsigned long liovcnt,
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const struct iovec *rvec,
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unsigned long riovcnt,
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unsigned long flags)
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{
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return syscall(__NR_process_vm_readv,
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(long) pid, lvec, liovcnt, rvec, riovcnt, flags);
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}
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# define process_vm_readv strace_process_vm_readv
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#endif /* !HAVE_PROCESS_VM_READV */
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static bool
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call_process_vm_readv(const int pid, long *const addr)
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{
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long data = 0;
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const struct iovec local = {
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.iov_base = &data,
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.iov_len = sizeof(data)
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};
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const struct iovec remote = {
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.iov_base = addr,
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.iov_len = sizeof(*addr)
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};
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return process_vm_readv(pid, &local, 1, &remote, 1, 0) == sizeof(data)
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&& data == 1;
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}
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static bool
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call_ptrace_peekdata(const int pid, long *const addr)
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{
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return ptrace(PTRACE_PEEKDATA, pid, addr, 0) == 1;
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}
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static bool
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test_ucopy(bool (*fn)(int pid, long *addr))
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{
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static long data;
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data = 0;
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bool rc = false;
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int saved = 0;
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pid_t pid = fork();
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if (pid < 0)
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perror_msg_and_fail("fork");
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if (!pid) {
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data = 1;
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if (ptrace(PTRACE_TRACEME, 0, 0, 0))
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perror_msg_and_fail("PTRACE_TRACEME");
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raise(SIGSTOP);
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_exit(0);
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}
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for (;;) {
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int status, tracee;
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errno = 0;
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tracee = wait(&status);
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if (tracee != pid) {
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if (errno == EINTR)
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continue;
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saved = errno;
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kill(pid, SIGKILL);
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errno = saved;
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perror_msg_and_fail("wait");
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}
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if (WIFEXITED(status)) {
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if (WEXITSTATUS(status) == 0)
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break;
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error_msg_and_fail("unexpected exit status %u",
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WEXITSTATUS(status));
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}
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if (WIFSIGNALED(status))
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error_msg_and_fail("unexpected signal %u",
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WTERMSIG(status));
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if (!WIFSTOPPED(status) || WSTOPSIG(status) != SIGSTOP) {
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kill(pid, SIGKILL);
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error_msg_and_fail("unexpected wait status %x",
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status);
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}
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errno = 0;
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rc = fn(pid, &data);
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if (!rc)
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saved = errno;
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if (ptrace(PTRACE_CONT, pid, 0, 0)) {
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saved = errno;
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kill(pid, SIGKILL);
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errno = saved;
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perror_msg_and_fail("PTRACE_CONT");
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}
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}
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if (!rc)
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errno = saved;
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return rc;
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}
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bool
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test_process_vm_readv(void)
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{
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return test_ucopy(call_process_vm_readv);
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}
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bool
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test_ptrace_peekdata(void)
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{
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return test_ucopy(call_ptrace_peekdata);
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}
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