Module Name: src
Committed By: kamil
Date: Tue Nov 15 20:59:12 UTC 2016
Modified Files:
src/tests/kernel: t_ptrace_wait.c
Log Message:
Add new test fork2 in t_ptrace_wait*
Verify that fork(2) is not intercepted by ptrace(2) with empty EVENT_MASK.
This test works with all wait(2)-like functions.
Debugger receives only SIGCHLD from tracee, when its the child of tracee
exits. Tracer notes nothing about fork(2) events.
Sponsored by <The NetBSD Foundation>
To generate a diff of this commit:
cvs rdiff -u -r1.16 -r1.17 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:1.16 src/tests/kernel/t_ptrace_wait.c:1.17
--- src/tests/kernel/t_ptrace_wait.c:1.16 Tue Nov 15 19:30:28 2016
+++ src/tests/kernel/t_ptrace_wait.c Tue Nov 15 20:59:11 2016
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.c,v 1.16 2016/11/15 19:30:28 kamil Exp $ */
+/* $NetBSD: t_ptrace_wait.c,v 1.17 2016/11/15 20:59:11 kamil Exp $ */
/*-
* Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.16 2016/11/15 19:30:28 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.17 2016/11/15 20:59:11 kamil Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -1721,6 +1721,84 @@ ATF_TC_BODY(fork1, tc)
}
#endif
+ATF_TC(fork2);
+ATF_TC_HEAD(fork2, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Verify that fork(2) is not intercepted by ptrace(2) with empty "
+ "EVENT_MASK");
+}
+
+ATF_TC_BODY(fork2, 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 = fork()) != 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
@@ -1748,6 +1826,7 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, eventmask2);
ATF_TP_ADD_TC_HAVE_PID(tp, fork1);
+ ATF_TP_ADD_TC(tp, fork2);
return atf_no_error();
}
