[src/trunk]: src/tests/kernel Add eventmask1 and eventmask2 in t_ptrace_wait*

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

details:   https://anonhg.NetBSD.org/src/rev/050881beb783
branches:  trunk
changeset: 348907:050881beb783
user:      kamil <kamil%NetBSD.org@localhost>
date:      Tue Nov 15 02:53:32 2016 +0000

description:
Add eventmask1 and eventmask2 in t_ptrace_wait*

Add basic tests verifying that value between PT_SET_EVENT_MASK and
PT_GET_EVENT_MASK is preserved between two ptrace(2) calls.

eventmask1: Verify that empty EVENT_MASK is preserved
eventmask2: Verify that PTRACE_FORK in EVENT_MASK is preserved

Currently the only supported event in ptrace(2) is PTRACE_FORK.

These tests are appropriate for all wait(2)-like functions.

Sponsored by <The NetBSD Foundation>

diffstat:

 tests/kernel/t_ptrace_wait.c |  117 ++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 115 insertions(+), 2 deletions(-)

diffs (144 lines):

diff -r 0f4b02eb832b -r 050881beb783 tests/kernel/t_ptrace_wait.c
--- a/tests/kernel/t_ptrace_wait.c      Tue Nov 15 02:20:50 2016 +0000
+++ b/tests/kernel/t_ptrace_wait.c      Tue Nov 15 02:53:32 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_ptrace_wait.c,v 1.14 2016/11/15 02:20:50 kamil Exp $ */
+/*     $NetBSD: t_ptrace_wait.c,v 1.15 2016/11/15 02:53:32 kamil Exp $ */
 
 /*-
  * Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.14 2016/11/15 02:20:50 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.15 2016/11/15 02:53:32 kamil Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -1487,6 +1487,116 @@
 }
 #endif
 
+ATF_TC(eventmask1);
+ATF_TC_HEAD(eventmask1, tc)
+{
+       atf_tc_set_md_var(tc, "descr",
+           "Verify that empty EVENT_MASK is preserved");
+}
+
+ATF_TC_BODY(eventmask1, tc)
+{
+       const int exitval = 5;
+       const int sigval = SIGSTOP;
+       pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+       int status;
+#endif
+       ptrace_event_t set_event, get_event;
+       const int len = sizeof(ptrace_event_t);
+
+       printf("Before forking process PID=%d\n", getpid());
+       child = atf_utils_fork();
+       if (child == 0) {
+               printf("Before calling PT_TRACE_ME from child %d\n", getpid());
+               FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
+
+               printf("Before raising %s from child\n", strsignal(sigval));
+               FORKEE_ASSERT(raise(sigval) == 0);
+
+               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);
+
+       set_event.pe_set_event = 0;
+       ATF_REQUIRE(ptrace(PT_SET_EVENT_MASK, child, &set_event, len) != -1);
+       ATF_REQUIRE(ptrace(PT_GET_EVENT_MASK, child, &get_event, len) != -1);
+       ATF_REQUIRE(memcmp(&set_event, &get_event, len) == 0);
+
+       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_exited(status, exitval);
+
+       printf("Before calling %s() for the child\n", TWAIT_FNAME);
+       TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
+}
+
+ATF_TC(eventmask2);
+ATF_TC_HEAD(eventmask2, tc)
+{
+       atf_tc_set_md_var(tc, "descr",
+           "Verify that PTRACE_FORK in EVENT_MASK is preserved");
+}
+
+ATF_TC_BODY(eventmask2, tc)
+{
+       const int exitval = 5;
+       const int sigval = SIGSTOP;
+       pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+       int status;
+#endif
+       ptrace_event_t set_event, get_event;
+       const int len = sizeof(ptrace_event_t);
+
+       printf("Before forking process PID=%d\n", getpid());
+       child = atf_utils_fork();
+       if (child == 0) {
+               printf("Before calling PT_TRACE_ME from child %d\n", getpid());
+               FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
+
+               printf("Before raising %s from child\n", strsignal(sigval));
+               FORKEE_ASSERT(raise(sigval) == 0);
+
+               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);
+
+       set_event.pe_set_event = PTRACE_FORK;
+       ATF_REQUIRE(ptrace(PT_SET_EVENT_MASK, child, &set_event, len) != -1);
+       ATF_REQUIRE(ptrace(PT_GET_EVENT_MASK, child, &get_event, len) != -1);
+       ATF_REQUIRE(memcmp(&set_event, &get_event, len) == 0);
+
+       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_exited(status, exitval);
+
+       printf("Before calling %s() for the child\n", TWAIT_FNAME);
+       TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
+}
+
 #if defined(TWAIT_HAVE_PID)
 #define ATF_TP_ADD_TC_HAVE_PID(a,b)    ATF_TP_ADD_TC(a,b)
 #else
@@ -1510,5 +1620,8 @@
        ATF_TP_ADD_TC_HAVE_PID(tp, attach6);
        ATF_TP_ADD_TC_HAVE_PID(tp, attach7);
 
+       ATF_TP_ADD_TC(tp, eventmask1);
+       ATF_TP_ADD_TC(tp, eventmask2);
+
        return atf_no_error();
 }