From: Subrata Modak <subrata@linux.vnet.ibm.com>
To: Garrett Cooper <yanegomi@gmail.com>
Cc: LTP list <ltp-list@lists.sourceforge.net>
Subject: Re: [LTP] [New test] ptrace05.c - ptrace(PTRACE_TRACEME, ...) test
Date: Mon, 26 Oct 2009 22:32:59 +0530 [thread overview]
Message-ID: <1256576579.4929.59.camel@subratamodak.linux.ibm.com> (raw)
In-Reply-To: <364299f40910212314yc2f4f3fjc54b8d3897636be3@mail.gmail.com>
On Wed, 2009-10-21 at 23:14 -0700, Garrett Cooper wrote:
> The following calls ptrace(PTRACE_TRACEME, 0) for all signals and
> validates that all signals apart from SIGKILL are properly intercepted
> and WIFSTOPPED remains true, and SIGKILL is properly treated as
> WIFSIGNALED() && WTERMSIG() returns SIGKILL.
>
> 1. This test app helped unroot another issue with our custom Linux
> platform here at Cisco.
> 2. This test application does function properly on a Gentoo Linux
> based x86_64 / 2.6.30 kernel however, so it's an issue with our OS
> platform.
>
> I will add this application to testcases/kernel/syscalls/ptrace,
> if someone else sees the value in it. I agree that additional error
> checking could be added for the calls to kill(2)... I just whipped
> this up in 45 mins after finding this strange behavior on our
> platform.
>
> Signed-off-by: Garrett Cooper <yanegomi@gmail.com>
Just a quick build and test. It fails on my 32 bit and 64 bit X
machines:
# ./testcases/kernel/syscalls/ptrace/ptrace05
ptrace05 0 TINFO : [child] Sending kill(.., 0)
ptrace05 1 TFAIL : Didn't stop as expected.
ptrace05 0 TINFO : Is still alive!?
ptrace05 0 TINFO : [child] Sending kill(.., 1)
ptrace05 2 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 2)
ptrace05 3 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 3)
ptrace05 4 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 4)
ptrace05 5 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 5)
ptrace05 6 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 6)
ptrace05 7 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 7)
ptrace05 8 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 8)
ptrace05 9 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 9)
ptrace05 10 TPASS : Killed with SIGKILL, as expected.
ptrace05 0 TINFO : [child] Sending kill(.., 10)
ptrace05 11 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 11)
ptrace05 12 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 12)
ptrace05 13 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 13)
ptrace05 14 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 14)
ptrace05 15 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 15)
ptrace05 16 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 16)
ptrace05 17 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 17)
ptrace05 18 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 18)
ptrace05 19 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 19)
ptrace05 20 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 20)
ptrace05 21 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 21)
ptrace05 22 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 22)
ptrace05 23 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 23)
ptrace05 24 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 24)
ptrace05 25 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 25)
ptrace05 26 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 26)
ptrace05 27 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 27)
ptrace05 28 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 28)
ptrace05 29 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 29)
ptrace05 30 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 30)
ptrace05 31 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 31)
ptrace05 32 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 32)
ptrace05 33 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 33)
ptrace05 34 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 34)
ptrace05 35 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 35)
ptrace05 36 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 36)
ptrace05 37 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 37)
ptrace05 38 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 38)
ptrace05 39 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 39)
ptrace05 40 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 40)
ptrace05 41 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 41)
ptrace05 42 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 42)
ptrace05 43 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 43)
ptrace05 44 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 44)
ptrace05 45 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 45)
ptrace05 46 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 46)
ptrace05 47 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 47)
ptrace05 48 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 48)
ptrace05 49 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 49)
ptrace05 50 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 50)
ptrace05 51 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 51)
ptrace05 52 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 52)
ptrace05 53 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 53)
ptrace05 54 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 54)
ptrace05 55 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 55)
ptrace05 56 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 56)
ptrace05 57 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 57)
ptrace05 58 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 58)
ptrace05 59 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 59)
ptrace05 60 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 60)
ptrace05 61 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 61)
ptrace05 62 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 62)
ptrace05 63 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 63)
ptrace05 64 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 64)
ptrace05 65 TPASS : Stopped as expected
# echo $?
1
# uname -a
Linux 2.6.27.19-5-default #1 SMP 2009-02-28 04:40:21 +0100 x86_64 x86_64
x86_64 GNU/Linux
# ./testcases/kernel/syscalls/ptrace/ptrace05
ptrace05 0 TINFO : [child] Sending kill(.., 0)
ptrace05 1 TFAIL : Didn't stop as expected.
ptrace05 0 TINFO : Is still alive!?
ptrace05 0 TINFO : [child] Sending kill(.., 1)
ptrace05 2 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 2)
ptrace05 3 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 3)
ptrace05 4 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 4)
ptrace05 5 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 5)
ptrace05 6 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 6)
ptrace05 7 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 7)
ptrace05 8 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 8)
ptrace05 9 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 9)
ptrace05 10 TPASS : Killed with SIGKILL, as expected.
ptrace05 0 TINFO : [child] Sending kill(.., 10)
ptrace05 11 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 11)
ptrace05 12 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 12)
ptrace05 13 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 13)
ptrace05 14 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 14)
ptrace05 15 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 15)
ptrace05 16 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 16)
ptrace05 17 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 17)
ptrace05 18 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 18)
ptrace05 19 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 19)
ptrace05 20 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 20)
ptrace05 21 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 21)
ptrace05 22 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 22)
ptrace05 23 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 23)
ptrace05 24 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 24)
ptrace05 25 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 25)
ptrace05 26 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 26)
ptrace05 27 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 27)
ptrace05 28 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 28)
ptrace05 29 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 29)
ptrace05 30 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 30)
ptrace05 31 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 31)
ptrace05 32 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 32)
ptrace05 33 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 33)
ptrace05 34 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 34)
ptrace05 35 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 35)
ptrace05 36 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 36)
ptrace05 37 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 37)
ptrace05 38 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 38)
ptrace05 39 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 39)
ptrace05 40 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 40)
ptrace05 41 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 41)
ptrace05 42 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 42)
ptrace05 43 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 43)
ptrace05 44 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 44)
ptrace05 45 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 45)
ptrace05 46 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 46)
ptrace05 47 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 47)
ptrace05 48 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 48)
ptrace05 49 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 49)
ptrace05 50 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 50)
ptrace05 51 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 51)
ptrace05 52 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 52)
ptrace05 53 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 53)
ptrace05 54 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 54)
ptrace05 55 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 55)
ptrace05 56 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 56)
ptrace05 57 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 57)
ptrace05 58 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 58)
ptrace05 59 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 59)
ptrace05 60 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 60)
ptrace05 61 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 61)
ptrace05 62 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 62)
ptrace05 63 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 63)
ptrace05 64 TPASS : Stopped as expected
ptrace05 0 TINFO : [child] Sending kill(.., 64)
ptrace05 65 TPASS : Stopped as expected
# echo $?
1
# uname -a
Linux 2.6.18-92.el5 #1 SMP Tue Apr 29 13:16:12 EDT 2008 i686 i686 i386
GNU/Linux
Regards--
Subrata
>
> /*
> ******************************************************************************
> *
> * ptrace05 - an app which does PTRACE_TRACEME over the maximum available
> * signal range, or a set user-defined range.
> *
> * Copyright (C) 2009, Garrett Cooper
> *
> * This program is free software; you can redistribute it and/or modify
> * it under the terms of the GNU General Public License as published by
> * the Free Software Foundation; either version 2 of the License, or
> * (at your option) any later version.
> *
> * This program 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 General Public License for more details.
> *
> * You should have received a copy of the GNU General Public License along
> * with this program; if not, write to the Free Software Foundation, Inc.,
> * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
> *
> ******************************************************************************
> */
>
> #include <sys/ptrace.h>
> #include <sys/types.h>
> #include <sys/wait.h>
> #include <signal.h>
> #include <errno.h>
> #include <libgen.h>
> #include <math.h>
> #include <stdlib.h>
> #include <stdio.h>
> #include <string.h>
> #include <unistd.h>
> #include "test.h"
> #include "usctest.h"
>
> char *TCID = "ptrace05";
> int TST_TOTAL = 0;
>
> int usage(const char*);
>
> int
> usage(const char *argv0)
> {
> fprintf(stderr, "usage: %s [start-signum] [end-signum]\n", argv0);
> return 1;
> }
>
> int
> main(int argc, char **argv)
> {
>
> int end_signum = -1;
> int signum;
> int start_signum = -1;
> int status;
>
> pid_t child;
>
> /* Parse the CLI args appropriately. */
> switch (argc) {
> case 3:
> end_signum = (int) strtol((const char*) *(argv+2), NULL, 10);
> /* Parse the signal value. */
> if (end_signum == 0 && errno != 0) {
> tst_resm(TBROK, "argument (%s) isn't a valid number.\n",
> *(argv+2));
> tst_exit();
> }
> /* FALLTHROUGH */
> case 2:
> start_signum = (int) strtol((const char*) *(argv+1), NULL, 10);
> /* Parse the signal value. */
> if (end_signum == 0 && errno != 0) {
> tst_resm(TBROK, "argument (%s) isn't a valid number.\n",
> *(argv+1) );
> tst_exit();
> }
> break;
> case 1:
> /* Do nothing. */
> break;
> default:
> return usage(basename(*argv));
> }
>
> if (start_signum == -1) {
> start_signum = 0;
> }
> if (end_signum == -1) {
> end_signum = SIGRTMAX;
> }
>
> for (signum = start_signum; signum <= end_signum; signum++) {
>
> switch (child = fork()) {
> case -1:
> tst_resm(TBROK | TERRNO, "Failed to fork properly.");
> break;
> case 0:
>
> if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) != -1) {
> tst_resm(TINFO, "[child] Sending kill(.., %d)",
> signum);
> kill(getpid(), signum);
> } else {
>
> /*
> * This won't increment the TST_COUNT var.
> * properly, but it'll show up as a failure
> * nonetheless.
> */
> tst_resm(TFAIL | TERRNO,
> "Failed to ptrace(PTRACE_TRACEME, ...) "
> "properly");
>
> }
> exit(2); /* Shouldn't get here. */
>
> break;
>
> default:
>
> waitpid(child, &status, 0);
>
> switch(signum) {
>
> /*
> * SIGKILL should be trigger WIFSIGNALED => `true',
> * and should return WTERMSIG => SIGKILL
> */
> case SIGKILL:
> if (WIFSIGNALED(status)) {
> /* SIGKILL must be uncatchable. */
> if (WTERMSIG(status) == SIGKILL) {
> tst_resm(TPASS,
> "Killed with SIGKILL, "
> "as expected.");
> } else {
> tst_resm(TPASS,
> "Didn't die with "
> "SIGKILL (?!) ");
> }
> } else if (WIFEXITED(status)) {
> tst_resm(TFAIL,
> "Exited unexpectedly instead "
> "of dying with SIGKILL.");
> } else if (WIFSTOPPED(status)) {
> tst_resm(TFAIL,
> "Stopped instead of dying "
> "with SIGKILL.");
> }
> break;
> /* All other processes should be stopped. */
> default:
> if (WIFSTOPPED(status)) {
> tst_resm(TPASS, "Stopped as expected");
> } else {
> tst_resm(TFAIL, "Didn't stop as "
> "expected.");
> if (kill (child, 0)) {
> tst_resm(TINFO,
> "Is still alive!?");
> } else if (WIFEXITED(status)) {
> tst_resm(TINFO,
> "Exited normally");
> } else if (WIFSIGNALED(status)) {
> tst_resm(TINFO,
> "Was signaled with "
> "signum=%d",
> WTERMSIG(status));
> }
>
> }
>
> break;
>
> }
>
> }
> /* Make sure the child dies a quick and painless death ... */
> kill(child, 9);
>
> }
>
> tst_exit();
>
> }
>
> ------------------------------------------------------------------------------
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next prev parent reply other threads:[~2009-10-26 17:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-22 6:14 [LTP] [New test] ptrace05.c - ptrace(PTRACE_TRACEME, ...) test Garrett Cooper
2009-10-26 17:02 ` Subrata Modak [this message]
2009-10-26 19:33 ` Garrett Cooper
2009-10-27 7:33 ` Subrata Modak
2009-10-29 18:31 ` Subrata Modak
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