On Mon, 2009-10-26 at 12:33 -0700, Garrett Cooper wrote:
> On Mon, Oct 26, 2009 at 10:02 AM, Subrata Modak
> <[email protected]> wrote:
> > 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 <[email protected]>
> >
> > Just a quick build and test. It fails on my 32 bit and 64 bit X
> > machines:
>
> I looked at it again this weekend, and my criterion for kill (..., 0)
> was incorrect. The newer version passes, and tests correct criterion,
> as per the manpage:
This one works fine. Added it to CVS.
Regards--
Subrata
>
> 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
> gcoo...@orangebox /scratch/ltp-dev2/ltp $ echo $?
> 0
>
> /*
>
> ******************************************************************************
> *
> * ptrace05 - an app which ptraces itself as per arbitrarily
> specified signals,
> * over a user specified 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);
> if (kill(getpid(), signum) < 0) {
> tst_resm(TINFO | TERRNO,
> "[child] kill(.., %d) failed.",
> 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");
>
> }
> /* Shouldn't get here if signum == 0. */
> exit((signum == 0 ? 0 : 2));
> break;
>
> default:
>
> waitpid(child, &status, 0);
>
> switch(signum) {
> case 0:
> if (WIFEXITED(status) && WEXITSTATUS(status) ==
> 0) {
> tst_resm(TPASS, "kill(.., 0) exited "
> "with 0, as expected.");
> } else {
> tst_resm(TFAIL, "kill(.., 0) didn't
> exit "
> "with 0.");
> }
> break;
> 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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