Module Name: src
Committed By: kamil
Date: Mon Nov 28 21:37:00 UTC 2016
Modified Files:
src/tests/kernel: t_ptrace_wait.c
Log Message:
Add new test step1 in t_prace_wait{,3,4,6,id,pid} under PT_STEP guards
step1:
Verify single PT_STEP call.
This function is calculating happy numbers just to consume CPU cycles for
the test purpose.
PT_STEP raises SIGTRAP to by caught by a debugger.
Sponsored by <The NetBSD Foundation>
To generate a diff of this commit:
cvs rdiff -u -r1.32 -r1.33 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:1.32 src/tests/kernel/t_ptrace_wait.c:1.33
--- src/tests/kernel/t_ptrace_wait.c:1.32 Sat Nov 26 02:34:49 2016
+++ src/tests/kernel/t_ptrace_wait.c Mon Nov 28 21:37:00 2016
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.c,v 1.32 2016/11/26 02:34:49 kamil Exp $ */
+/* $NetBSD: t_ptrace_wait.c,v 1.33 2016/11/28 21:37:00 kamil Exp $ */
/*-
* Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.32 2016/11/26 02:34:49 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.33 2016/11/28 21:37:00 kamil Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -363,6 +363,40 @@ await_zombie(pid_t process)
}
#endif
+/* Happy number sequence -- this function is used to just consume cpu cycles */
+#define HAPPY_NUMBER 1
+
+/* If n is not happy then its sequence ends in the cycle:
+ * 4, 16, 37, 58, 89, 145, 42, 20, 4, ... */
+#define SAD_NUMBER 4
+
+/* Calculate the sum of the squares of the digits of n */
+static unsigned __used
+dsum(unsigned n)
+{
+ unsigned sum, x;
+ for (sum = 0; n; n /= 10) {
+ x = n % 10;
+ sum += x * x;
+ }
+ return sum;
+}
+
+static int __used
+check_happy(unsigned n)
+{
+ for (;;) {
+ unsigned total = dsum(n);
+
+ if (total == HAPPY_NUMBER)
+ return 1;
+ if (total == SAD_NUMBER)
+ return 0;
+
+ n = total;
+ }
+}
+
ATF_TC(traceme1);
ATF_TC_HEAD(traceme1, tc)
{
@@ -4455,6 +4489,70 @@ ATF_TC_BODY(fpregs2, tc)
}
#endif
+#if defined(PT_STEP)
+ATF_TC(step1);
+ATF_TC_HEAD(step1, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Verify single PT_STEP call");
+}
+
+ATF_TC_BODY(step1, tc)
+{
+ const int exitval = 5;
+ const int sigval = SIGSTOP;
+ pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+ int status;
+#endif
+ int happy;
+
+ 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);
+
+ happy = check_happy(100);
+
+ printf("Before raising %s from child\n", strsignal(sigval));
+ FORKEE_ASSERT(raise(sigval) == 0);
+
+ FORKEE_ASSERT_EQ(happy, check_happy(100));
+
+ 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 resuming the child process where it left off and "
+ "without signal to be sent (use PT_STEP)\n");
+ ATF_REQUIRE(ptrace(PT_STEP, 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_stopped(status, SIGTRAP);
+
+ 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));
+}
+#endif
+
#if defined(TWAIT_HAVE_PID)
#define ATF_TP_ADD_TC_HAVE_PID(a,b) ATF_TP_ADD_TC(a,b)
#else
@@ -4473,6 +4571,12 @@ ATF_TC_BODY(fpregs2, tc)
#define ATF_TP_ADD_TC_HAVE_FPREGS(a,b)
#endif
+#if defined(PT_STEP)
+#define ATF_TP_ADD_TC_PT_STEP(a,b) ATF_TP_ADD_TC(a,b)
+#else
+#define ATF_TP_ADD_TC_PT_STEP(a,b)
+#endif
+
ATF_TP_ADD_TCS(tp)
{
setvbuf(stdout, NULL, _IONBF, 0);
@@ -4544,5 +4648,7 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC_HAVE_FPREGS(tp, fpregs1);
ATF_TP_ADD_TC_HAVE_FPREGS(tp, fpregs2);
+ ATF_TP_ADD_TC_PT_STEP(tp, step1);
+
return atf_no_error();
}
