[src/trunk]: src/tests/kernel Add new test signal8 in t_ptrace_wait{, 3, 4, 6, id...

[kamil <kamil%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3cb44397d05c
branches:  trunk
changeset: 350936:3cb44397d05c
user:      kamil <kamil%NetBSD.org@localhost>
date:      Fri Jan 27 16:06:23 2017 +0000

description:
Add new test signal8 in t_ptrace_wait{,3,4,6,id,pid}

signal8:
    Verify that masking SIGTRAP in tracee does not stop tracer from
    catching PTRACE_VFORK_DONE breakpoint

This test is marked as broken and linked with PR kern/51918.

Sponsored by <The NetBSD Foundation>

diffstat:

 tests/kernel/t_ptrace_wait.c |  113 +++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 110 insertions(+), 3 deletions(-)

diffs (148 lines):

diff -r 696a79dc7f2e -r 3cb44397d05c tests/kernel/t_ptrace_wait.c
--- a/tests/kernel/t_ptrace_wait.c      Fri Jan 27 15:52:21 2017 +0000
+++ b/tests/kernel/t_ptrace_wait.c      Fri Jan 27 16:06:23 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_ptrace_wait.c,v 1.66 2017/01/27 00:34:52 kamil Exp $ */
+/*     $NetBSD: t_ptrace_wait.c,v 1.67 2017/01/27 16:06:23 kamil Exp $ */
 
 /*-
  * Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.66 2017/01/27 00:34:52 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.67 2017/01/27 16:06:23 kamil Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -1753,7 +1753,8 @@
 
        validate_status_stopped(status, sigval);
 
-       printf("Enable PTRACE_VFORK in EVENT_MASK for the child %d\n", child);
+       printf("Enable PTRACE_VFORK_DONE in EVENT_MASK for the child %d\n",
+           child);
        event.pe_set_event = PTRACE_VFORK_DONE;
        ATF_REQUIRE(ptrace(PT_SET_EVENT_MASK, child, &event, elen) != -1);
 
@@ -6270,6 +6271,111 @@
 }
 #endif
 
+ATF_TC(signal8);
+ATF_TC_HEAD(signal8, tc)
+{
+       atf_tc_set_md_var(tc, "descr",
+           "Verify that masking SIGTRAP in tracee does not stop tracer from "
+           "catching PTRACE_VFORK_DONE breakpoint");
+}
+
+ATF_TC_BODY(signal8, tc)
+{
+       const int exitval = 5;
+       const int exitval2 = 15;
+       const int sigval = SIGSTOP;
+       const int sigmasked = SIGTRAP;
+       pid_t child, child2, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+       int status;
+#endif
+       sigset_t intmask;
+       ptrace_state_t state;
+       const int slen = sizeof(state);
+       ptrace_event_t event;
+       const int elen = sizeof(event);
+
+       atf_tc_expect_fail("PR kern/51918");
+
+       printf("Before forking process PID=%d\n", getpid());
+       ATF_REQUIRE((child = fork()) != -1);
+       if (child == 0) {
+               printf("Before calling PT_TRACE_ME from child %d\n", getpid());
+               FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
+
+               sigemptyset(&intmask);
+               sigaddset(&intmask, sigmasked);
+               sigprocmask(SIG_BLOCK, &intmask, NULL);
+
+               printf("Before raising %s from child\n", strsignal(sigval));
+               FORKEE_ASSERT(raise(sigval) == 0);
+
+               FORKEE_ASSERT((child2 = vfork()) != 1);
+
+               if (child2 == 0)
+                       _exit(exitval2);
+
+               FORKEE_REQUIRE_SUCCESS
+                       (wpid = TWAIT_GENERIC(child2, &status, 0), child2);
+
+               forkee_status_exited(status, exitval2);
+
+               printf("Before exiting of the child process\n");
+               _exit(exitval);
+       }
+       printf("Parent process PID=%d, child's PID=%d\n", getpid(), child);
+
+       printf("Before calling %s() for the child\n", TWAIT_FNAME);
+       TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+       validate_status_stopped(status, sigval);
+
+       printf("Enable PTRACE_VFORK_DONE in EVENT_MASK for the child %d\n",
+           child);
+       event.pe_set_event = PTRACE_VFORK_DONE;
+       ATF_REQUIRE(ptrace(PT_SET_EVENT_MASK, child, &event, elen) != -1);
+
+       printf("Before resuming the child process where it left off and "
+           "without signal to be sent\n");
+       ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
+
+       printf("Before calling %s() for the child\n", TWAIT_FNAME);
+       TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+       validate_status_stopped(status, sigmasked);
+
+       ATF_REQUIRE(ptrace(PT_GET_PROCESS_STATE, child, &state, slen) != -1);
+       printf("report_event=%d\n", state.pe_report_event);
+       ATF_REQUIRE_EQ(state.pe_report_event, PTRACE_VFORK_DONE);
+
+       child2 = state.pe_other_pid;
+       printf("Reported PTRACE_VFORK_DONE event with forkee %d\n", child2);
+
+       printf("Before resuming the child process where it left off and "
+           "without signal to be sent\n");
+       ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
+
+       printf("Before calling %s() for the child - expected stopped "
+           "SIGCHLD\n", TWAIT_FNAME);
+       TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);                                                                               
+
+       validate_status_stopped(status, SIGCHLD);
+
+       printf("Before resuming the child process where it left off and "                                                                                    
+           "without signal to be sent\n");
+       ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
+
+       printf("Before calling %s() for the child - expected exited\n",
+           TWAIT_FNAME);
+       TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+       validate_status_exited(status, exitval);
+
+       printf("Before calling %s() for the child - expected no process\n",
+           TWAIT_FNAME);                                                                                                                                    
+       TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
+}
+
 ATF_TP_ADD_TCS(tp)
 {
        setvbuf(stdout, NULL, _IONBF, 0);
@@ -6379,6 +6485,7 @@
        ATF_TP_ADD_TC(tp, signal5);
        ATF_TP_ADD_TC_HAVE_PID(tp, signal6);
        ATF_TP_ADD_TC_HAVE_PID(tp, signal7);
+       ATF_TP_ADD_TC(tp, signal8);
 
        return atf_no_error();
 }