Module Name: src
Committed By: kamil
Date: Sat Dec 3 07:23:08 UTC 2016
Modified Files:
src/tests/kernel: t_ptrace_wait.c
Log Message:
Add new tests lwpinfo1 in t_ptrace_wait* and lwpinfo2 under HAVE_PID guard
lwpinfo1:
Verify baic LWPINFO call for single thread (PT_TRACE_ME)
lwpinfo2:
Verify baic LWPINFO call for single thread (PT_ATTACH from tracer)
Both tests are marked as expected failure PR kern/51685:
ptrace(2): Signal does not set PL_EVENT_SIGNAL in
(struct ptrace_lwpinfo.)pl_event
Sponsored by <The NetBSD Foundation>
To generate a diff of this commit:
cvs rdiff -u -r1.37 -r1.38 src/tests/kernel/t_ptrace_wait.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/tests/kernel/t_ptrace_wait.c
diff -u src/tests/kernel/t_ptrace_wait.c:1.37 src/tests/kernel/t_ptrace_wait.c:1.38
--- src/tests/kernel/t_ptrace_wait.c:1.37 Thu Dec 1 20:11:17 2016
+++ src/tests/kernel/t_ptrace_wait.c Sat Dec 3 07:23:08 2016
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.c,v 1.37 2016/12/01 20:11:17 kamil Exp $ */
+/* $NetBSD: t_ptrace_wait.c,v 1.38 2016/12/03 07:23:08 kamil Exp $ */
/*-
* Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.37 2016/12/01 20:11:17 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.38 2016/12/03 07:23:08 kamil Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -4620,6 +4620,227 @@ ATF_TC_BODY(kill2, tc)
TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
}
+ATF_TC(lwpinfo1);
+ATF_TC_HEAD(lwpinfo1, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Verify baic LWPINFO call for single thread (PT_TRACE_ME)");
+}
+
+ATF_TC_BODY(lwpinfo1, tc)
+{
+ const int exitval = 5;
+ const int sigval = SIGSTOP;
+ pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+ int status;
+#endif
+ struct ptrace_lwpinfo info = {0};
+
+ /*
+ * ptrace(2): Signal does not set PL_EVENT_SIGNAL in
+ * (struct ptrace_lwpinfo.)pl_event
+ */
+ atf_tc_expect_fail("PR kern/51685");
+
+ 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);
+
+ printf("Before calling ptrace(2) with PT_LWPINFO for child\n");
+ ATF_REQUIRE(ptrace(PT_LWPINFO, child, &info, sizeof(info)) != -1);
+
+ printf("Assert that there exists a thread\n");
+ ATF_REQUIRE(info.pl_lwpid > 0);
+
+ printf("Assert that lwp thread %d received event PL_EVENT_SIGNAL\n",
+ info.pl_lwpid);
+ ATF_REQUIRE_EQ_MSG(info.pl_event, PL_EVENT_SIGNAL,
+ "Received event %d != expected event %d",
+ info.pl_event, PL_EVENT_SIGNAL);
+
+ printf("Before calling ptrace(2) with PT_LWPINFO for child\n");
+ ATF_REQUIRE(ptrace(PT_LWPINFO, child, &info, sizeof(info)) != -1);
+
+ printf("Assert that there are no more lwp threads in child\n");
+ ATF_REQUIRE_EQ(info.pl_lwpid, 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)
+ATF_TC(lwpinfo2);
+ATF_TC_HEAD(lwpinfo2, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Verify baic LWPINFO call for single thread (PT_ATTACH from "
+ "tracer)");
+}
+
+ATF_TC_BODY(lwpinfo2, tc)
+{
+ int fds_totracee[2], fds_totracer[2], fds_fromtracer[2];
+ int rv;
+ const int exitval_tracee = 5;
+ const int exitval_tracer = 10;
+ pid_t tracee, tracer, wpid;
+ uint8_t msg = 0xde; /* dummy message for IPC based on pipe(2) */
+#if defined(TWAIT_HAVE_STATUS)
+ int status;
+#endif
+ struct ptrace_lwpinfo info = {0};
+
+ /*
+ * ptrace(2): Signal does not set PL_EVENT_SIGNAL in
+ * (struct ptrace_lwpinfo.)pl_event
+ */
+ atf_tc_expect_fail("PR kern/51685");
+
+ printf("Spawn tracee\n");
+ ATF_REQUIRE(pipe(fds_totracee) == 0);
+ tracee = atf_utils_fork();
+ if (tracee == 0) {
+ FORKEE_ASSERT(close(fds_totracee[1]) == 0);
+
+ /* Wait for message from the parent */
+ rv = read(fds_totracee[0], &msg, sizeof(msg));
+ FORKEE_ASSERT(rv == sizeof(msg));
+
+ _exit(exitval_tracee);
+ }
+ ATF_REQUIRE(close(fds_totracee[0]) == 0);
+
+ printf("Spawn debugger\n");
+ ATF_REQUIRE(pipe(fds_totracer) == 0);
+ ATF_REQUIRE(pipe(fds_fromtracer) == 0);
+ tracer = atf_utils_fork();
+ if (tracer == 0) {
+ /* No IPC to communicate with the child */
+ FORKEE_ASSERT(close(fds_totracee[1]) == 0);
+
+ FORKEE_ASSERT(close(fds_totracer[1]) == 0);
+ FORKEE_ASSERT(close(fds_fromtracer[0]) == 0);
+
+ printf("Before calling PT_ATTACH from tracee %d\n", getpid());
+ FORKEE_ASSERT(ptrace(PT_ATTACH, tracee, NULL, 0) != -1);
+
+ /* Wait for tracee and assert that it was stopped w/ SIGSTOP */
+ FORKEE_REQUIRE_SUCCESS(
+ wpid = TWAIT_GENERIC(tracee, &status, 0), tracee);
+
+ forkee_status_stopped(status, SIGSTOP);
+
+ printf("Before calling ptrace(2) with PT_LWPINFO for child\n");
+ FORKEE_ASSERT(ptrace(PT_LWPINFO, tracee, &info, sizeof(info))
+ != -1);
+
+ printf("Assert that there exists a thread\n");
+ FORKEE_ASSERTX(info.pl_lwpid > 0);
+
+ printf("Assert that lwp thread %d received event "
+ "PL_EVENT_SIGNAL\n", info.pl_lwpid);
+ FORKEE_ASSERT_EQ(info.pl_event, PL_EVENT_SIGNAL);
+
+ printf("Before calling ptrace(2) with PT_LWPINFO for child\n");
+ FORKEE_ASSERT(ptrace(PT_LWPINFO, tracee, &info, sizeof(info))
+ != -1);
+
+ printf("Assert that there are no more lwp threads in child\n");
+ FORKEE_ASSERTX(info.pl_lwpid == 0);
+
+ /* Resume tracee with PT_CONTINUE */
+ FORKEE_ASSERT(ptrace(PT_CONTINUE, tracee, (void *)1, 0) != -1);
+
+ /* Inform parent that tracer has attached to tracee */
+ rv = write(fds_fromtracer[1], &msg, sizeof(msg));
+ FORKEE_ASSERT(rv == sizeof(msg));
+
+ /* Wait for parent */
+ rv = read(fds_totracer[0], &msg, sizeof(msg));
+ FORKEE_ASSERT(rv == sizeof(msg));
+
+ /* Wait for tracee and assert that it exited */
+ FORKEE_REQUIRE_SUCCESS(
+ wpid = TWAIT_GENERIC(tracee, &status, 0), tracee);
+
+ forkee_status_exited(status, exitval_tracee);
+
+ printf("Before exiting of the tracer process\n");
+ _exit(exitval_tracer);
+ }
+ ATF_REQUIRE(close(fds_totracer[0]) == 0);
+ ATF_REQUIRE(close(fds_fromtracer[1]) == 0);
+
+ printf("Wait for the tracer to attach to the tracee\n");
+ rv = read(fds_fromtracer[0], &msg, sizeof(msg));
+ ATF_REQUIRE(rv == sizeof(msg));
+
+ printf("Resume the tracee and let it exit\n");
+ rv = write(fds_totracee[1], &msg, sizeof(msg));
+ ATF_REQUIRE(rv == sizeof(msg));
+
+ printf("fds_totracee is no longer needed - close it\n");
+ ATF_REQUIRE(close(fds_totracee[1]) == 0);
+
+ printf("Detect that tracee is zombie\n");
+ await_zombie(tracee);
+
+ printf("Assert that there is no status about tracee - "
+ "Tracer must detect zombie first - calling %s()\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(
+ wpid = TWAIT_GENERIC(tracee, &status, WNOHANG), 0);
+
+ printf("Resume the tracer and let it detect exited tracee\n");
+ rv = write(fds_totracer[1], &msg, sizeof(msg));
+ ATF_REQUIRE(rv == sizeof(msg));
+
+ printf("Wait for tracer to finish its job and exit - calling %s()\n",
+ TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(tracer, &status, 0),
+ tracer);
+
+ validate_status_exited(status, exitval_tracer);
+
+ printf("Wait for tracee to finish its job and exit - calling %s()\n",
+ TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(tracee, &status, WNOHANG),
+ tracee);
+
+ validate_status_exited(status, exitval_tracee);
+
+ printf("fds_fromtracer is no longer needed - close it\n");
+ ATF_REQUIRE(close(fds_fromtracer[0]) == 0);
+
+ printf("fds_totracer is no longer needed - close it\n");
+ ATF_REQUIRE(close(fds_totracer[1]) == 0);
+}
+#endif
+
ATF_TP_ADD_TCS(tp)
{
setvbuf(stdout, NULL, _IONBF, 0);
@@ -4702,5 +4923,8 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, kill1);
ATF_TP_ADD_TC(tp, kill2);
+ ATF_TP_ADD_TC(tp, lwpinfo1);
+ ATF_TP_ADD_TC_HAVE_PID(tp, lwpinfo2);
+
return atf_no_error();
}
