2009-04-13 16:22:38 +00:00
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/*-
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2010-03-10 20:31:30 +00:00
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* Copyright 1997 Sean Eric Fagan
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1997-12-20 18:40:43 +00:00
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Sean Eric Fagan
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* 4. Neither the name of the author may be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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2003-09-07 15:50:43 +00:00
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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1998-01-05 07:30:26 +00:00
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1997-12-06 05:23:12 +00:00
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/*
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* Various setup functions for truss. Not the cleanest-written code,
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* I'm afraid.
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*/
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2007-04-10 04:03:34 +00:00
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|
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#include <sys/ptrace.h>
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2015-09-30 19:13:32 +00:00
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#include <sys/sysctl.h>
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2001-10-22 02:02:00 +00:00
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#include <sys/wait.h>
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|
|
2015-09-30 19:13:32 +00:00
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#include <assert.h>
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1998-01-05 07:30:26 +00:00
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#include <err.h>
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2009-12-13 03:14:06 +00:00
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#include <errno.h>
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1998-01-05 07:30:26 +00:00
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#include <signal.h>
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2015-09-30 19:13:32 +00:00
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#include <stdint.h>
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1997-12-06 05:23:12 +00:00
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#include <stdio.h>
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#include <stdlib.h>
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2009-12-13 03:14:06 +00:00
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#include <string.h>
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2016-01-26 19:07:09 +00:00
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#include <sysdecode.h>
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2009-12-13 03:14:06 +00:00
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#include <time.h>
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1997-12-06 05:23:12 +00:00
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#include <unistd.h>
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2002-08-04 00:46:48 +00:00
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#include "truss.h"
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2015-09-30 19:13:32 +00:00
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#include "syscall.h"
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2001-12-11 23:34:02 +00:00
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#include "extern.h"
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2015-09-30 19:13:32 +00:00
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SET_DECLARE(procabi, struct procabi);
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2012-09-12 13:06:57 +00:00
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static sig_atomic_t detaching;
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1997-12-06 05:23:12 +00:00
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2015-09-30 19:13:32 +00:00
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static void new_proc(struct trussinfo *, pid_t);
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1997-12-06 05:23:12 +00:00
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/*
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* setup_and_wait() is called to start a process. All it really does
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2015-09-30 19:13:32 +00:00
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* is fork(), enable tracing in the child, and then exec the given
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* command. At that point, the child process stops, and the parent
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* can wake up and deal with it.
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1997-12-06 05:23:12 +00:00
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*/
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2015-09-30 19:13:32 +00:00
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void
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setup_and_wait(struct trussinfo *info, char *command[])
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2005-03-27 12:47:04 +00:00
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{
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2012-08-21 14:58:51 +00:00
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pid_t pid;
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2005-03-27 12:47:04 +00:00
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2007-04-10 04:03:34 +00:00
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pid = vfork();
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2012-09-02 11:03:18 +00:00
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if (pid == -1)
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2005-03-27 12:47:04 +00:00
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err(1, "fork failed");
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if (pid == 0) { /* Child */
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2007-04-10 04:03:34 +00:00
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ptrace(PT_TRACE_ME, 0, 0, 0);
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2005-03-27 12:47:04 +00:00
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execvp(command[0], command);
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2007-04-10 04:03:34 +00:00
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err(1, "execvp %s", command[0]);
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2005-03-27 12:47:04 +00:00
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}
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2012-09-02 11:03:18 +00:00
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2005-03-27 12:47:04 +00:00
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/* Only in the parent here */
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2012-09-11 16:30:26 +00:00
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if (waitpid(pid, NULL, 0) < 0)
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2007-04-10 04:03:34 +00:00
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err(1, "unexpect stop in waitpid");
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2005-03-27 12:47:04 +00:00
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2015-09-30 19:13:32 +00:00
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new_proc(info, pid);
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1997-12-06 05:23:12 +00:00
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}
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/*
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2015-09-30 19:13:32 +00:00
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* start_tracing is called to attach to an existing process.
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1997-12-06 05:23:12 +00:00
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*/
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2015-09-30 19:13:32 +00:00
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void
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start_tracing(struct trussinfo *info, pid_t pid)
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2005-03-27 12:47:04 +00:00
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{
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2012-09-11 16:30:26 +00:00
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int ret, retry;
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2007-04-10 04:03:34 +00:00
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2012-09-02 11:03:18 +00:00
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retry = 10;
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2007-04-10 04:03:34 +00:00
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do {
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ret = ptrace(PT_ATTACH, pid, NULL, 0);
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usleep(200);
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2012-09-02 11:03:18 +00:00
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} while (ret && retry-- > 0);
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2007-04-10 04:03:34 +00:00
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if (ret)
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err(1, "can not attach to target process");
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2012-09-11 16:30:26 +00:00
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if (waitpid(pid, NULL, 0) < 0)
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2007-04-10 04:03:34 +00:00
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err(1, "Unexpect stop in waitpid");
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2015-09-30 19:13:32 +00:00
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new_proc(info, pid);
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1997-12-06 05:23:12 +00:00
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}
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/*
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* Restore a process back to it's pre-truss state.
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* Called for SIGINT, SIGTERM, SIGQUIT. This only
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* applies if truss was told to monitor an already-existing
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* process.
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*/
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void
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2007-04-10 04:03:34 +00:00
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restore_proc(int signo __unused)
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2012-09-12 13:06:57 +00:00
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{
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detaching = 1;
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}
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2015-09-30 19:13:32 +00:00
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static void
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2012-09-12 13:06:57 +00:00
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detach_proc(pid_t pid)
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2007-04-10 04:03:34 +00:00
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{
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1997-12-06 05:23:12 +00:00
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2012-09-02 11:03:18 +00:00
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/* stop the child so that we can detach */
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2012-09-12 13:06:57 +00:00
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kill(pid, SIGSTOP);
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2015-09-30 19:13:32 +00:00
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if (waitpid(pid, NULL, 0) < 0)
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2007-04-10 04:03:34 +00:00
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err(1, "Unexpected stop in waitpid");
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2012-09-12 13:06:57 +00:00
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if (ptrace(PT_DETACH, pid, (caddr_t)1, 0) < 0)
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2007-04-10 04:03:34 +00:00
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err(1, "Can not detach the process");
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2012-09-02 11:03:18 +00:00
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2012-09-12 13:06:57 +00:00
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kill(pid, SIGCONT);
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2015-09-30 19:13:32 +00:00
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}
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/*
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* Determine the ABI. This is called after every exec, and when
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* a process is first monitored.
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*/
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static struct procabi *
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find_abi(pid_t pid)
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{
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struct procabi **pabi;
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size_t len;
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int error;
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int mib[4];
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char progt[32];
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len = sizeof(progt);
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROC;
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mib[2] = KERN_PROC_SV_NAME;
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mib[3] = pid;
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error = sysctl(mib, 4, progt, &len, NULL, 0);
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if (error != 0)
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err(2, "can not get sysvec name");
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SET_FOREACH(pabi, procabi) {
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if (strcmp((*pabi)->type, progt) == 0)
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return (*pabi);
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}
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warnx("ABI %s for pid %ld is not supported", progt, (long)pid);
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return (NULL);
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}
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static void
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new_proc(struct trussinfo *info, pid_t pid)
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{
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struct procinfo *np;
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/*
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* If this happens it means there is a bug in truss. Unfortunately
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* this will kill any processes are attached to.
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*/
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LIST_FOREACH(np, &info->proclist, entries) {
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if (np->pid == pid)
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errx(1, "Duplicate process for pid %ld", (long)pid);
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}
|
2012-09-12 13:06:57 +00:00
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2015-09-30 19:13:32 +00:00
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if (info->flags & FOLLOWFORKS)
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if (ptrace(PT_FOLLOW_FORK, pid, NULL, 1) == -1)
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err(1, "Unable to follow forks for pid %ld", (long)pid);
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np = calloc(1, sizeof(struct procinfo));
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np->pid = pid;
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np->abi = find_abi(pid);
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SLIST_INIT(&np->threadlist);
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LIST_INSERT_HEAD(&info->proclist, np, entries);
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}
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static void
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free_proc(struct procinfo *p)
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{
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struct threadinfo *t, *t2;
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SLIST_FOREACH_SAFE(t, &p->threadlist, entries, t2) {
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free(t);
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}
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LIST_REMOVE(p, entries);
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free(p);
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}
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static void
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detach_all_procs(struct trussinfo *info)
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{
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struct procinfo *p, *p2;
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LIST_FOREACH_SAFE(p, &info->proclist, entries, p2) {
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detach_proc(p->pid);
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free_proc(p);
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}
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}
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static struct procinfo *
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find_proc(struct trussinfo *info, pid_t pid)
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{
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struct procinfo *np;
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LIST_FOREACH(np, &info->proclist, entries) {
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if (np->pid == pid)
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return (np);
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}
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return (NULL);
|
1997-12-06 05:23:12 +00:00
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}
|
2007-04-10 04:03:34 +00:00
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/*
|
2015-09-30 19:13:32 +00:00
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* Change curthread member based on (pid, lwpid).
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* If it is a new thread, create a threadinfo structure.
|
2007-04-10 04:03:34 +00:00
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*/
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static void
|
2015-09-30 19:13:32 +00:00
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find_thread(struct trussinfo *info, pid_t pid, lwpid_t lwpid)
|
2007-04-10 04:03:34 +00:00
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{
|
2015-09-30 19:13:32 +00:00
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struct procinfo *np;
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struct threadinfo *nt;
|
2012-09-02 11:03:18 +00:00
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2015-09-30 19:13:32 +00:00
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np = find_proc(info, pid);
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assert(np != NULL);
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SLIST_FOREACH(nt, &np->threadlist, entries) {
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if (nt->tid == lwpid) {
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info->curthread = nt;
|
2012-09-02 11:03:18 +00:00
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return;
|
2007-04-10 04:03:34 +00:00
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}
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}
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|
2015-09-30 19:13:32 +00:00
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nt = calloc(1, sizeof(struct threadinfo));
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if (nt == NULL)
|
2012-09-16 14:38:01 +00:00
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err(1, "calloc() failed");
|
2015-09-30 19:13:32 +00:00
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nt->proc = np;
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nt->tid = lwpid;
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SLIST_INSERT_HEAD(&np->threadlist, nt, entries);
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info->curthread = nt;
|
2007-04-10 04:03:34 +00:00
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}
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/*
|
2015-09-30 19:13:32 +00:00
|
|
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* When a process exits, it no longer has any threads left. However,
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* the main loop expects a valid curthread. In cases when a thread
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* triggers the termination (e.g. calling exit or triggering a fault)
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* we would ideally use that thread. However, if a process is killed
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* by a signal sent from another process then there is no "correct"
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* thread. We just punt and use the first thread.
|
2007-04-10 04:03:34 +00:00
|
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*/
|
2015-09-30 19:13:32 +00:00
|
|
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static void
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|
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find_exit_thread(struct trussinfo *info, pid_t pid)
|
2007-04-10 04:03:34 +00:00
|
|
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{
|
2015-09-30 19:13:32 +00:00
|
|
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struct procinfo *np;
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struct threadinfo *nt;
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np = find_proc(info, pid);
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assert(np != NULL);
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if (SLIST_EMPTY(&np->threadlist)) {
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/*
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* If an existing process exits right after we attach
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* to it but before it posts any events, there won't
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* be any threads. Create a dummy thread and set its
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* "before" time to the global start time.
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*/
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nt = calloc(1, sizeof(struct threadinfo));
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|
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if (nt == NULL)
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|
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err(1, "calloc() failed");
|
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|
nt->proc = np;
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|
nt->tid = 0;
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SLIST_INSERT_HEAD(&np->threadlist, nt, entries);
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nt->before = info->start_time;
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}
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info->curthread = SLIST_FIRST(&np->threadlist);
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}
|
2012-09-02 11:03:18 +00:00
|
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|
|
2015-09-30 19:13:32 +00:00
|
|
|
static void
|
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|
|
alloc_syscall(struct threadinfo *t, struct ptrace_lwpinfo *pl)
|
|
|
|
{
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|
|
|
u_int i;
|
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|
|
|
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|
|
assert(t->in_syscall == 0);
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|
|
assert(t->cs.number == 0);
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|
|
assert(t->cs.name == NULL);
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|
|
assert(t->cs.nargs == 0);
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|
for (i = 0; i < nitems(t->cs.s_args); i++)
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|
|
assert(t->cs.s_args[i] == NULL);
|
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|
|
memset(t->cs.args, 0, sizeof(t->cs.args));
|
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|
|
t->cs.number = pl->pl_syscall_code;
|
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|
|
t->in_syscall = 1;
|
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|
|
}
|
2007-04-10 04:03:34 +00:00
|
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|
2015-09-30 19:13:32 +00:00
|
|
|
static void
|
|
|
|
free_syscall(struct threadinfo *t)
|
|
|
|
{
|
|
|
|
u_int i;
|
|
|
|
|
|
|
|
for (i = 0; i < t->cs.nargs; i++)
|
|
|
|
free(t->cs.s_args[i]);
|
|
|
|
memset(&t->cs, 0, sizeof(t->cs));
|
|
|
|
t->in_syscall = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
enter_syscall(struct trussinfo *info, struct ptrace_lwpinfo *pl)
|
|
|
|
{
|
|
|
|
struct threadinfo *t;
|
|
|
|
struct syscall *sc;
|
|
|
|
u_int i, narg;
|
|
|
|
|
|
|
|
t = info->curthread;
|
|
|
|
alloc_syscall(t, pl);
|
|
|
|
narg = MIN(pl->pl_syscall_narg, nitems(t->cs.args));
|
|
|
|
if (narg != 0 && t->proc->abi->fetch_args(info, narg) != 0) {
|
|
|
|
free_syscall(t);
|
2012-09-12 13:06:57 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2016-01-26 19:07:09 +00:00
|
|
|
t->cs.name = sysdecode_syscallname(t->proc->abi->abi, t->cs.number);
|
2015-09-30 19:13:32 +00:00
|
|
|
if (t->cs.name == NULL)
|
|
|
|
fprintf(info->outfile, "-- UNKNOWN %s SYSCALL %d --\n",
|
|
|
|
t->proc->abi->type, t->cs.number);
|
|
|
|
|
2015-10-05 18:08:35 +00:00
|
|
|
sc = get_syscall(t->cs.name, narg);
|
|
|
|
t->cs.nargs = sc->nargs;
|
|
|
|
assert(sc->nargs <= nitems(t->cs.s_args));
|
2012-09-02 11:03:18 +00:00
|
|
|
|
2015-09-30 19:13:32 +00:00
|
|
|
t->cs.sc = sc;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* At this point, we set up the system call arguments.
|
|
|
|
* We ignore any OUT ones, however -- those are arguments that
|
|
|
|
* are set by the system call, and so are probably meaningless
|
|
|
|
* now. This doesn't currently support arguments that are
|
|
|
|
* passed in *and* out, however.
|
|
|
|
*/
|
|
|
|
if (t->cs.name != NULL) {
|
|
|
|
#if DEBUG
|
|
|
|
fprintf(stderr, "syscall %s(", t->cs.name);
|
|
|
|
#endif
|
|
|
|
for (i = 0; i < t->cs.nargs; i++) {
|
|
|
|
#if DEBUG
|
|
|
|
fprintf(stderr, "0x%lx%s", sc ?
|
|
|
|
t->cs.args[sc->args[i].offset] : t->cs.args[i],
|
|
|
|
i < (t->cs.nargs - 1) ? "," : "");
|
|
|
|
#endif
|
2015-10-05 18:08:35 +00:00
|
|
|
if (!(sc->args[i].type & OUT)) {
|
2015-09-30 19:13:32 +00:00
|
|
|
t->cs.s_args[i] = print_arg(&sc->args[i],
|
|
|
|
t->cs.args, 0, info);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#if DEBUG
|
|
|
|
fprintf(stderr, ")\n");
|
|
|
|
#endif
|
2007-04-10 04:03:34 +00:00
|
|
|
}
|
2015-09-30 19:13:32 +00:00
|
|
|
|
|
|
|
clock_gettime(CLOCK_REALTIME, &t->before);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
exit_syscall(struct trussinfo *info, struct ptrace_lwpinfo *pl)
|
|
|
|
{
|
|
|
|
struct threadinfo *t;
|
|
|
|
struct procinfo *p;
|
|
|
|
struct syscall *sc;
|
|
|
|
long retval[2];
|
|
|
|
u_int i;
|
|
|
|
int errorp;
|
|
|
|
|
|
|
|
t = info->curthread;
|
|
|
|
if (!t->in_syscall)
|
|
|
|
return;
|
|
|
|
|
|
|
|
clock_gettime(CLOCK_REALTIME, &t->after);
|
|
|
|
p = t->proc;
|
|
|
|
if (p->abi->fetch_retval(info, retval, &errorp) < 0) {
|
|
|
|
free_syscall(t);
|
2007-04-10 04:03:34 +00:00
|
|
|
return;
|
|
|
|
}
|
2015-09-30 19:13:32 +00:00
|
|
|
|
|
|
|
sc = t->cs.sc;
|
2015-10-05 18:08:35 +00:00
|
|
|
/*
|
|
|
|
* Here, we only look for arguments that have OUT masked in --
|
|
|
|
* otherwise, they were handled in enter_syscall().
|
|
|
|
*/
|
|
|
|
for (i = 0; i < sc->nargs; i++) {
|
|
|
|
char *temp;
|
|
|
|
|
|
|
|
if (sc->args[i].type & OUT) {
|
|
|
|
/*
|
|
|
|
* If an error occurred, then don't bother
|
|
|
|
* getting the data; it may not be valid.
|
|
|
|
*/
|
|
|
|
if (errorp) {
|
|
|
|
asprintf(&temp, "0x%lx",
|
|
|
|
t->cs.args[sc->args[i].offset]);
|
|
|
|
} else {
|
|
|
|
temp = print_arg(&sc->args[i],
|
|
|
|
t->cs.args, retval, info);
|
2015-09-30 19:13:32 +00:00
|
|
|
}
|
2015-10-05 18:08:35 +00:00
|
|
|
t->cs.s_args[i] = temp;
|
2015-09-30 19:13:32 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-02-16 22:00:01 +00:00
|
|
|
print_syscall_ret(info, errorp, retval);
|
2015-09-30 19:13:32 +00:00
|
|
|
free_syscall(t);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the process executed a new image, check the ABI. If the
|
|
|
|
* new ABI isn't supported, stop tracing this process.
|
|
|
|
*/
|
|
|
|
if (pl->pl_flags & PL_FLAG_EXEC) {
|
|
|
|
p->abi = find_abi(p->pid);
|
|
|
|
if (p->abi == NULL) {
|
|
|
|
if (ptrace(PT_DETACH, p->pid, (caddr_t)1, 0) < 0)
|
|
|
|
err(1, "Can not detach the process");
|
|
|
|
free_proc(p);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
report_exit(struct trussinfo *info, siginfo_t *si)
|
|
|
|
{
|
|
|
|
struct timespec timediff;
|
|
|
|
|
|
|
|
if (info->flags & FOLLOWFORKS)
|
|
|
|
fprintf(info->outfile, "%5d: ", si->si_pid);
|
|
|
|
clock_gettime(CLOCK_REALTIME, &info->curthread->after);
|
|
|
|
if (info->flags & ABSOLUTETIMESTAMPS) {
|
|
|
|
timespecsubt(&info->curthread->after, &info->start_time,
|
|
|
|
&timediff);
|
|
|
|
fprintf(info->outfile, "%jd.%09ld ", (intmax_t)timediff.tv_sec,
|
|
|
|
timediff.tv_nsec);
|
|
|
|
}
|
|
|
|
if (info->flags & RELATIVETIMESTAMPS) {
|
|
|
|
timespecsubt(&info->curthread->after, &info->curthread->before,
|
|
|
|
&timediff);
|
|
|
|
fprintf(info->outfile, "%jd.%09ld ", (intmax_t)timediff.tv_sec,
|
|
|
|
timediff.tv_nsec);
|
|
|
|
}
|
|
|
|
if (si->si_code == CLD_EXITED)
|
|
|
|
fprintf(info->outfile, "process exit, rval = %u\n",
|
|
|
|
si->si_status);
|
|
|
|
else
|
|
|
|
fprintf(info->outfile, "process killed, signal = %u%s\n",
|
|
|
|
si->si_status, si->si_code == CLD_DUMPED ?
|
|
|
|
" (core dumped)" : "");
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
report_new_child(struct trussinfo *info, pid_t pid)
|
|
|
|
{
|
|
|
|
struct timespec timediff;
|
|
|
|
|
|
|
|
clock_gettime(CLOCK_REALTIME, &info->curthread->after);
|
|
|
|
assert(info->flags & FOLLOWFORKS);
|
|
|
|
fprintf(info->outfile, "%5d: ", pid);
|
|
|
|
if (info->flags & ABSOLUTETIMESTAMPS) {
|
|
|
|
timespecsubt(&info->curthread->after, &info->start_time,
|
|
|
|
&timediff);
|
|
|
|
fprintf(info->outfile, "%jd.%09ld ", (intmax_t)timediff.tv_sec,
|
|
|
|
timediff.tv_nsec);
|
|
|
|
}
|
|
|
|
if (info->flags & RELATIVETIMESTAMPS) {
|
|
|
|
timediff.tv_sec = 0;
|
|
|
|
timediff.tv_nsec = 0;
|
|
|
|
fprintf(info->outfile, "%jd.%09ld ", (intmax_t)timediff.tv_sec,
|
|
|
|
timediff.tv_nsec);
|
|
|
|
}
|
|
|
|
fprintf(info->outfile, "<new process>\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
report_signal(struct trussinfo *info, siginfo_t *si)
|
|
|
|
{
|
|
|
|
struct timespec timediff;
|
|
|
|
char *signame;
|
|
|
|
|
|
|
|
if (info->flags & FOLLOWFORKS)
|
|
|
|
fprintf(info->outfile, "%5d: ", si->si_pid);
|
|
|
|
if (info->flags & ABSOLUTETIMESTAMPS) {
|
|
|
|
timespecsubt(&info->curthread->after, &info->start_time,
|
|
|
|
&timediff);
|
|
|
|
fprintf(info->outfile, "%jd.%09ld ", (intmax_t)timediff.tv_sec,
|
|
|
|
timediff.tv_nsec);
|
|
|
|
}
|
|
|
|
if (info->flags & RELATIVETIMESTAMPS) {
|
|
|
|
timespecsubt(&info->curthread->after, &info->curthread->before,
|
|
|
|
&timediff);
|
|
|
|
fprintf(info->outfile, "%jd.%09ld ", (intmax_t)timediff.tv_sec,
|
|
|
|
timediff.tv_nsec);
|
|
|
|
}
|
|
|
|
signame = strsig(si->si_status);
|
|
|
|
fprintf(info->outfile, "SIGNAL %u (%s)\n", si->si_status,
|
|
|
|
signame == NULL ? "?" : signame);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Wait for events until all the processes have exited or truss has been
|
|
|
|
* asked to stop.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
eventloop(struct trussinfo *info)
|
|
|
|
{
|
|
|
|
struct ptrace_lwpinfo pl;
|
|
|
|
siginfo_t si;
|
|
|
|
int pending_signal;
|
|
|
|
|
|
|
|
while (!LIST_EMPTY(&info->proclist)) {
|
|
|
|
if (detaching) {
|
|
|
|
detach_all_procs(info);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (waitid(P_ALL, 0, &si, WTRAPPED | WEXITED) == -1) {
|
|
|
|
if (errno == EINTR)
|
|
|
|
continue;
|
|
|
|
err(1, "Unexpected error from waitid");
|
|
|
|
}
|
|
|
|
|
|
|
|
assert(si.si_signo == SIGCHLD);
|
|
|
|
|
|
|
|
switch (si.si_code) {
|
|
|
|
case CLD_EXITED:
|
|
|
|
case CLD_KILLED:
|
|
|
|
case CLD_DUMPED:
|
|
|
|
find_exit_thread(info, si.si_pid);
|
|
|
|
if ((info->flags & COUNTONLY) == 0)
|
|
|
|
report_exit(info, &si);
|
|
|
|
free_proc(info->curthread->proc);
|
|
|
|
info->curthread = NULL;
|
|
|
|
break;
|
|
|
|
case CLD_TRAPPED:
|
|
|
|
if (ptrace(PT_LWPINFO, si.si_pid, (caddr_t)&pl,
|
|
|
|
sizeof(pl)) == -1)
|
|
|
|
err(1, "ptrace(PT_LWPINFO)");
|
|
|
|
|
|
|
|
if (pl.pl_flags & PL_FLAG_CHILD) {
|
|
|
|
new_proc(info, si.si_pid);
|
|
|
|
assert(LIST_FIRST(&info->proclist)->abi !=
|
|
|
|
NULL);
|
|
|
|
}
|
|
|
|
find_thread(info, si.si_pid, pl.pl_lwpid);
|
|
|
|
|
2015-10-05 21:39:07 +00:00
|
|
|
if (si.si_status == SIGTRAP &&
|
|
|
|
(pl.pl_flags & (PL_FLAG_SCE|PL_FLAG_SCX)) != 0) {
|
2015-09-30 19:13:32 +00:00
|
|
|
if (pl.pl_flags & PL_FLAG_SCE)
|
|
|
|
enter_syscall(info, &pl);
|
|
|
|
else if (pl.pl_flags & PL_FLAG_SCX)
|
|
|
|
exit_syscall(info, &pl);
|
|
|
|
pending_signal = 0;
|
|
|
|
} else if (pl.pl_flags & PL_FLAG_CHILD) {
|
|
|
|
if ((info->flags & COUNTONLY) == 0)
|
|
|
|
report_new_child(info, si.si_pid);
|
|
|
|
pending_signal = 0;
|
|
|
|
} else {
|
|
|
|
if ((info->flags & NOSIGS) == 0)
|
|
|
|
report_signal(info, &si);
|
|
|
|
pending_signal = si.si_status;
|
2011-12-04 18:43:09 +00:00
|
|
|
}
|
2015-09-30 19:13:32 +00:00
|
|
|
ptrace(PT_SYSCALL, si.si_pid, (caddr_t)1,
|
|
|
|
pending_signal);
|
|
|
|
break;
|
|
|
|
case CLD_STOPPED:
|
|
|
|
errx(1, "waitid reported CLD_STOPPED");
|
|
|
|
case CLD_CONTINUED:
|
2007-04-10 04:03:34 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|