Module Name: src
Committed By: kamil
Date: Sat Nov 12 12:54:32 UTC 2016
Modified Files:
src/tests/kernel: t_ptrace_wait.c
Log Message:
Add new test attach4 in t_ptrace_wait{,3,4,6,id,pid}
Assert that tracer child can PT_ATTACH to its parent.
Sponsored by <The NetBSD Foundation>.
To generate a diff of this commit:
cvs rdiff -u -r1.4 -r1.5 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:1.4 src/tests/kernel/t_ptrace_wait.c:1.5
--- src/tests/kernel/t_ptrace_wait.c:1.4 Fri Nov 11 17:08:54 2016
+++ src/tests/kernel/t_ptrace_wait.c Sat Nov 12 12:54:32 2016
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.c,v 1.4 2016/11/11 17:08:54 christos Exp $ */
+/* $NetBSD: t_ptrace_wait.c,v 1.5 2016/11/12 12:54:32 kamil Exp $ */
/*-
* Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.4 2016/11/11 17:08:54 christos Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.5 2016/11/12 12:54:32 kamil Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -892,6 +892,85 @@ ATF_TC_BODY(attach3, tc)
ATF_REQUIRE(close(fds_totracee[1]) == 0);
}
+ATF_TC(attach4);
+ATF_TC_HEAD(attach4, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Assert that tracer child can PT_ATTACH to its parent");
+}
+
+ATF_TC_BODY(attach4, tc)
+{
+ int fds_totracer[2], fds_fromtracer[2];
+ int rv;
+ const int exitval_tracer = 5;
+ pid_t tracer, wpid;
+ uint8_t msg = 0xde; /* dummy message for IPC based on pipe(2) */
+#if defined(TWAIT_HAVE_STATUS)
+ int status;
+#endif
+
+ printf("Spawn tracer\n");
+ ATF_REQUIRE(pipe(fds_totracer) == 0);
+ ATF_REQUIRE(pipe(fds_fromtracer) == 0);
+ tracer = atf_utils_fork();
+ if (tracer == 0) {
+ FORKEE_ASSERT(close(fds_totracer[1]) == 0);
+ FORKEE_ASSERT(close(fds_fromtracer[0]) == 0);
+
+ /* Wait for message from the parent */
+ rv = read(fds_totracer[0], &msg, sizeof(msg));
+ FORKEE_ASSERT(rv == sizeof(msg));
+
+ printf("Attach to parent PID %d with PT_ATTACH from child\n",
+ getppid());
+ FORKEE_ASSERT(ptrace(PT_ATTACH, getppid(), NULL, 0) != -1);
+
+ printf("Wait for the stopped parent process with %s()\n",
+ TWAIT_FNAME);
+ FORKEE_REQUIRE_SUCCESS(
+ wpid = TWAIT_GENERIC(getppid(), &status, 0), getppid());
+
+ forkee_status_stopped(status, SIGSTOP);
+
+ printf("Resume parent with PT_DETACH\n");
+ FORKEE_ASSERT(ptrace(PT_DETACH, getppid(), (void *)1, 0)
+ != -1);
+
+ /* Wait for message from the parent */
+ rv = write(fds_fromtracer[1], &msg, sizeof(msg));
+ FORKEE_ASSERT(rv == sizeof(msg));
+
+ _exit(exitval_tracer);
+ }
+ ATF_REQUIRE(close(fds_totracer[0]) == 0);
+ ATF_REQUIRE(close(fds_fromtracer[1]) == 0);
+
+ printf("Wait for the tracer to become ready\n");
+ rv = write(fds_totracer[1], &msg, sizeof(msg));
+ ATF_REQUIRE(rv == sizeof(msg));
+
+ printf("Let the tracer exit now\n");
+ rv = read(fds_fromtracer[0], &msg, sizeof(msg));
+ ATF_REQUIRE(rv == sizeof(msg));
+
+ printf("Wait for tracer to exit with %s()\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(
+ wpid = TWAIT_GENERIC(tracer, &status, 0), tracer);
+
+ validate_status_exited(status, exitval_tracer);
+
+ printf("Before calling %s() for tracer\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_FAILURE(ECHILD,
+ wpid = TWAIT_GENERIC(tracer, &status, 0));
+
+ 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);
+}
+
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, traceme1);
@@ -904,6 +983,7 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, attach2);
#endif
ATF_TP_ADD_TC(tp, attach3);
+ ATF_TP_ADD_TC(tp, attach4);
#if defined(TWAIT_WAIT4TYPE)
/* TODO */
