[src/trunk]: src/tests/kernel Add new tests signal[23] in t_ptrace_wait{, 3, 4, ...

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

details:   https://anonhg.NetBSD.org/src/rev/a9df11ea8097
branches:  trunk
changeset: 821165:a9df11ea8097
user:      kamil <kamil%NetBSD.org@localhost>
date:      Thu Jan 26 20:15:44 2017 +0000

description:
Add new tests signal[23] in t_ptrace_wait{,3,4,6,id,pid}

signal2:
    Verify that masking SIGTRAP in tracee stops tracer from
    catching this raised signal

signal3:
    Verify that masking SIGTRAP in tracee does not stop tracer from
    catching software breakpoints

signal3 is marked as failing and refrenced with PR kern/51918
Currently signal3 requires code for other architectures than x86_64

Sponsored by <The NetBSD Foundation>

diffstat:

 tests/kernel/t_ptrace_wait.c |  138 ++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 136 insertions(+), 2 deletions(-)

diffs (166 lines):

diff -r 1d8c9d9555cd -r a9df11ea8097 tests/kernel/t_ptrace_wait.c
--- a/tests/kernel/t_ptrace_wait.c      Thu Jan 26 19:00:13 2017 +0000
+++ b/tests/kernel/t_ptrace_wait.c      Thu Jan 26 20:15:44 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_ptrace_wait.c,v 1.62 2017/01/26 17:03:21 kamil Exp $ */
+/*     $NetBSD: t_ptrace_wait.c,v 1.63 2017/01/26 20:15:44 kamil Exp $ */
 
 /*-
  * Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.62 2017/01/26 17:03:21 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.63 2017/01/26 20:15:44 kamil Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -5734,6 +5734,138 @@
        TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
 }
 
+ATF_TC(signal2);
+ATF_TC_HEAD(signal2, tc)
+{
+       atf_tc_set_md_var(tc, "descr",
+           "Verify that masking SIGTRAP in tracee stops tracer from "
+           "catching this raised signal");
+}
+
+ATF_TC_BODY(signal2, tc)
+{
+       const int exitval = 5;
+       const int sigval = SIGSTOP;
+       const int sigmasked = SIGTRAP;
+       pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+       int status;
+#endif
+       sigset_t intmask;
+
+       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);
+
+               printf("Before raising %s breakpoint from child\n",
+                   strsignal(sigmasked));
+               FORKEE_ASSERT(raise(sigmasked) == 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);
+
+       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(signal3);
+ATF_TC_HEAD(signal3, tc)
+{
+       atf_tc_set_md_var(tc, "descr",
+           "Verify that masking SIGTRAP in tracee does not stop tracer from "
+           "catching software breakpoints");
+}
+
+ATF_TC_BODY(signal3, tc)
+{
+       const int exitval = 5;
+       const int sigval = SIGSTOP;
+       const int sigmasked = SIGTRAP;
+       pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+       int status;
+#endif
+       sigset_t intmask;
+
+       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);
+
+               printf("Before raising software breakpoint from child\n");
+#if defined(__x86_64__)
+               __asm__ __volatile__ ("int3\n;");
+#else
+               /*  port me */
+#endif
+
+               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("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);
+
+       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_TP_ADD_TCS(tp)
 {
        setvbuf(stdout, NULL, _IONBF, 0);
@@ -5837,6 +5969,8 @@
        ATF_TP_ADD_TC(tp, lwp_exit1);
 
        ATF_TP_ADD_TC(tp, signal1);
+       ATF_TP_ADD_TC(tp, signal2);
+       ATF_TP_ADD_TC(tp, signal3);
 
        return atf_no_error();
 }