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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>
This commit is contained in:
kamil 2016-11-28 21:37:00 +00:00
parent 572cb7ec52
commit dc4348e29b
1 changed files with 108 additions and 2 deletions
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110
tests/kernel/t_ptrace_wait.c
View File

@ -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();
}