Module Name: src
Committed By: kamil
Date: Tue Nov 15 21:50:38 UTC 2016
Modified Files:
src/tests/kernel: t_ptrace_wait.c
Log Message:
Add vfork1 test in t_ptrace_wait* and vfork2 in t_ptrace_wait{4,6,id,pid}
These tests are exact clones for fork1 and fork2, however testing vfork(2).
vfork1:
Verify that vfork(2) is intercepted by ptrace(2) with EVENT_MASK set to
PTRACE_VFORK.
vfork2:
Verify that vfork(2) is not intercepted by ptrace(2) with empty
EVENT_MASK.
vfork1 is supposed to test currently unimplemented PTRACE_VFORK option in
EVENT_MASK, marked as failure and linked with PR kern/51630.
Sponsored by <The NetBSD Foundation>
To generate a diff of this commit:
cvs rdiff -u -r1.17 -r1.18 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:1.17 src/tests/kernel/t_ptrace_wait.c:1.18
--- src/tests/kernel/t_ptrace_wait.c:1.17 Tue Nov 15 20:59:11 2016
+++ src/tests/kernel/t_ptrace_wait.c Tue Nov 15 21:50:38 2016
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.c,v 1.17 2016/11/15 20:59:11 kamil Exp $ */
+/* $NetBSD: t_ptrace_wait.c,v 1.18 2016/11/15 21:50:38 kamil Exp $ */
/*-
* Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.17 2016/11/15 20:59:11 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.18 2016/11/15 21:50:38 kamil Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -1800,6 +1800,216 @@ ATF_TC_BODY(fork2, tc)
}
#if defined(TWAIT_HAVE_PID)
+ATF_TC(vfork1);
+ATF_TC_HEAD(vfork1, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Verify that vfork(2) is intercepted by ptrace(2) with EVENT_MASK "
+ "set to PTRACE_VFORK");
+}
+
+ATF_TC_BODY(vfork1, tc)
+{
+ const int exitval = 5;
+ const int exitval2 = 15;
+ const int sigval = SIGSTOP;
+ pid_t child, child2, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+ int status;
+#endif
+ ptrace_state_t state;
+ const int slen = sizeof(state);
+ ptrace_event_t event;
+ const int elen = sizeof(event);
+
+ /*
+ * ptrace(2) command PT_SET_EVENT_MASK: option PTRACE_VFORK unsupported
+ */
+#ifndef PTRACE_VFORK
+#define PTRACE_VFORK 0
+#endif
+ atf_tc_expect_fail("PR kern/51630");
+
+ 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);
+
+ 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 in EVENT_MASK for the child %d\n", child);
+ event.pe_set_event = PTRACE_VFORK;
+ 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 %d\n", TWAIT_FNAME, child);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+ validate_status_stopped(status, SIGTRAP);
+
+ ATF_REQUIRE(ptrace(PT_GET_PROCESS_STATE, child, &state, slen) != -1);
+ ATF_REQUIRE_EQ(state.pe_report_event, PTRACE_VFORK);
+
+ child2 = state.pe_other_pid;
+ printf("Reported PTRACE_VFORK event with forkee %d\n", child2);
+
+ printf("Before calling %s() for the forkee %d of the child %d\n",
+ TWAIT_FNAME, child2, child);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child2, &status, 0),
+ child2);
+
+ validate_status_stopped(status, SIGTRAP);
+
+ ATF_REQUIRE(ptrace(PT_GET_PROCESS_STATE, child2, &state, slen) != -1);
+ ATF_REQUIRE_EQ(state.pe_report_event, PTRACE_VFORK);
+ ATF_REQUIRE_EQ(state.pe_other_pid, child);
+
+ printf("Before resuming the forkee process where it left off and "
+ "without signal to be sent\n");
+ ATF_REQUIRE(ptrace(PT_CONTINUE, child2, (void *)1, 0) != -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 forkee - expected exited\n",
+ TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child2, &status, 0),
+ child2);
+
+ validate_status_exited(status, exitval2);
+
+ printf("Before calling %s() for the forkee - expected no process\n",
+ TWAIT_FNAME);
+ TWAIT_REQUIRE_FAILURE(ECHILD,
+ wpid = TWAIT_GENERIC(child2, &status, 0));
+
+ 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));
+}
+#endif
+
+ATF_TC(vfork2);
+ATF_TC_HEAD(vfork2, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Verify that vfork(2) is not intercepted by ptrace(2) with empty "
+ "EVENT_MASK");
+}
+
+ATF_TC_BODY(vfork2, tc)
+{
+ const int exitval = 5;
+ const int exitval2 = 15;
+ const int sigval = SIGSTOP;
+ pid_t child, child2, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+ int status;
+#endif
+ ptrace_event_t event;
+ const int elen = sizeof(event);
+
+ 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);
+
+ 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("Set empty EVENT_MASK for the child %d\n", child);
+ event.pe_set_event = 0;
+ 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 - 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));
+}
+
+#if defined(TWAIT_HAVE_PID)
#define ATF_TP_ADD_TC_HAVE_PID(a,b) ATF_TP_ADD_TC(a,b)
#else
#define ATF_TP_ADD_TC_HAVE_PID(a,b)
@@ -1828,5 +2038,8 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC_HAVE_PID(tp, fork1);
ATF_TP_ADD_TC(tp, fork2);
+ ATF_TP_ADD_TC_HAVE_PID(tp, vfork1);
+ ATF_TP_ADD_TC(tp, vfork2);
+
return atf_no_error();
}
