Module Name: src
Committed By: kamil
Date: Thu Nov 3 08:48:54 UTC 2016
Modified Files:
src/tests/kernel: t_ptrace.c
Log Message:
Add new test traceme3 in t_ptrace
This test is modeled after traceme1 and traceme2 with the goal to test if
the child was terminated with a received signal passed with PT_CONTINUE.
Currently the three traceme tests verifies three possible status values from
waitpid(2) called by the parent:
- WIFEXITED(status),
- WIFSIGNALED(status),
- WIFSTOPPED(status)
with associated macros:
- WEXITSTATUS(status),
- WTERMSIG(status),
- WCOREDUMP(status),
- WSTOPSIG(status).
In traceme3 has been assumed that Ctrl-C (SIGINT) does not emit core(5).
Sponsored by <The NetBSD Foundation>.
To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/tests/kernel/t_ptrace.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.c
diff -u src/tests/kernel/t_ptrace.c:1.2 src/tests/kernel/t_ptrace.c:1.3
--- src/tests/kernel/t_ptrace.c:1.2 Wed Nov 2 22:18:04 2016
+++ src/tests/kernel/t_ptrace.c Thu Nov 3 08:48:53 2016
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace.c,v 1.2 2016/11/02 22:18:04 kamil Exp $ */
+/* $NetBSD: t_ptrace.c,v 1.3 2016/11/03 08:48:53 kamil Exp $ */
/*-
* Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace.c,v 1.2 2016/11/02 22:18:04 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace.c,v 1.3 2016/11/03 08:48:53 kamil Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -141,7 +141,6 @@ ATF_TC_BODY(traceme1, tc)
sys_errlist[ECHILD], sys_errlist[errno]);
ATF_REQUIRE(errno == ECHILD);
}
-
}
ATF_TC(traceme2);
@@ -271,13 +270,121 @@ ATF_TC_BODY(traceme2, tc)
sys_errlist[ECHILD], sys_errlist[errno]);
ATF_REQUIRE(errno == ECHILD);
}
+}
+
+ATF_TC(traceme3);
+ATF_TC_HEAD(traceme3, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Verify SIGSTOP followed by termination by a signal in a child");
+}
+
+ATF_TC_BODY(traceme3, tc)
+{
+ int status;
+ const int sigval = SIGSTOP, sigsent = SIGINT /* Without core-dump */;
+ pid_t child, wpid;
+
+ printf("1: Before forking process PID=%d\n", getpid());
+ ATF_REQUIRE((child = fork()) != -1);
+ if (child == 0) {
+ /* printf(3) messages from a child aren't intercepted by ATF */
+ /* "2: Child process PID=%d\n", getpid() */
+
+ /* "2: Before calling ptrace(PT_TRACE_ME, ...)\n" */
+ if (ptrace(PT_TRACE_ME, 0, NULL, 0) == -1) {
+ /* XXX: Is it safe to use ATF functions in a child? */
+ err(EXIT_FAILURE, "2: ptrace(2) call failed with "
+ "status %s", sys_errlist[errno]);
+ }
+ /* "2: Before raising SIGSTOP\n" */
+ raise(sigval);
+
+ /* NOTREACHED */
+ errx(EXIT_FAILURE, "2: Child should be terminated here by a "
+ "signal from parent");
+ } else {
+ printf("1: Parent process PID=%d, child's PID=%d\n", getpid(),
+ child);
+
+ printf("1: Before calling waitpid() for the child\n");
+ wpid = waitpid(child, &status, 0);
+
+ printf("1: Validating child's PID (expected %d, got %d)\n",
+ child, wpid);
+ ATF_REQUIRE(child == wpid);
+
+ printf("1: Ensuring that the child has not been exited\n");
+ ATF_REQUIRE(!WIFEXITED(status));
+
+ printf("1: Ensuring that the child has not been continued\n");
+ ATF_REQUIRE(!WIFCONTINUED(status));
+
+ printf("1: Ensuring that the child has not been terminated "
+ "with a signal\n");
+ ATF_REQUIRE(!WIFSIGNALED(status));
+
+ printf("1: Ensuring that the child has been stopped\n");
+ ATF_REQUIRE(WIFSTOPPED(status));
+
+ printf("1: Verifying that he child has been stopped with the"
+ " %s signal (received %s)\n", sys_signame[sigval],
+ sys_signame[WSTOPSIG(status)]);
+ ATF_REQUIRE(WSTOPSIG(status) == sigval);
+
+ printf("1: Before resuming the child process where it left "
+ "off and with signal %s to be sent\n",
+ sys_signame[sigsent]);
+ ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, sigsent)
+ != -1);
+
+ printf("1: Before calling waitpid() for the child\n");
+ wpid = waitpid(child, &status, 0);
+
+ printf("1: Validating that child's PID is still there\n");
+ ATF_REQUIRE(wpid == child);
+
+ printf("1: Ensuring that the child has not been exited\n");
+ ATF_REQUIRE(!WIFEXITED(status));
+
+ printf("1: Ensuring that the child has not been continued\n");
+ ATF_REQUIRE(!WIFCONTINUED(status));
+
+ printf("1: Ensuring that the child hast been terminated with "
+ "a signal\n");
+ ATF_REQUIRE(WIFSIGNALED(status));
+
+ printf("1: Ensuring that the child has not been stopped\n");
+ ATF_REQUIRE(!WIFSTOPPED(status));
+
+ printf("1: Verifying that he child has not core dumped "
+ "for the %s signal (it is the default behavior)\n",
+ sys_signame[sigsent]);
+ ATF_REQUIRE(!WCOREDUMP(status));
+
+ printf("1: Verifying that he child has been stopped with the"
+ " %s signal (received %s)\n", sys_signame[sigsent],
+ sys_signame[WTERMSIG(status)]);
+ ATF_REQUIRE(WTERMSIG(status) == sigsent);
+
+ printf("1: Before calling waitpid() for the exited child\n");
+ wpid = waitpid(child, &status, 0);
+
+ printf("1: Validating that child's PID no longer exists\n");
+ ATF_REQUIRE(wpid == -1);
+
+ printf("1: Validating that errno is set to %s (got %s)\n",
+ sys_errlist[ECHILD], sys_errlist[errno]);
+ ATF_REQUIRE(errno == ECHILD);
+ }
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, traceme1);
ATF_TP_ADD_TC(tp, traceme2);
+ ATF_TP_ADD_TC(tp, traceme3);
return atf_no_error();
}
