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Add a new ATF ptrace(2) test: traceme_vfork_exec 

Verify PT_TRACE_ME followed by exec(3) in a vfork(2)ed child.

This tests passes correctly.

Sponsored by <The NetBSD Foundation>
This commit is contained in:
kamil 2018-05-16 02:47:25 +00:00
parent 983fb9900d
commit 98c4cd6bac
1 changed files with 65 additions and 2 deletions
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67
tests/lib/libc/sys/t_ptrace_wait.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: t_ptrace_wait.c,v 1.42 2018/05/16 01:36:29 kamil Exp $ */
/* $NetBSD: t_ptrace_wait.c,v 1.43 2018/05/16 02:47:25 kamil Exp $ */
/*-
* Copyright (c) 2016 The NetBSD Foundation, Inc.
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: t_ptrace_wait.c,v 1.42 2018/05/16 01:36:29 kamil Exp $");
__RCSID("$NetBSD: t_ptrace_wait.c,v 1.43 2018/05/16 02:47:25 kamil Exp $");
#include <sys/param.h>
#include <sys/types.h>
@ -500,6 +500,67 @@ ATF_TC_BODY(traceme_vfork_breakpoint, tc)
/// ----------------------------------------------------------------------------
ATF_TC(traceme_vfork_exec);
ATF_TC_HEAD(traceme_vfork_exec, tc)
{
atf_tc_set_md_var(tc, "descr",
"Verify PT_TRACE_ME followed by exec(3) in a vfork(2)ed child");
}
ATF_TC_BODY(traceme_vfork_exec, tc)
{
const int sigval = SIGTRAP;
pid_t child, wpid;
#if defined(TWAIT_HAVE_STATUS)
int status;
#endif
struct ptrace_siginfo info;
memset(&info, 0, sizeof(info));
DPRINTF("Before forking process PID=%d\n", getpid());
SYSCALL_REQUIRE((child = vfork()) != -1);
if (child == 0) {
DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid());
FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
DPRINTF("Before calling execve(2) from child\n");
execlp("/bin/echo", "/bin/echo", NULL);
/* NOTREACHED */
FORKEE_ASSERTX(0 && "Not reached");
}
DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child);
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
validate_status_stopped(status, sigval);
DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO for child\n");
SYSCALL_REQUIRE(ptrace(PT_GET_SIGINFO, child, &info, sizeof(info)) != -1);
DPRINTF("Signal traced to lwpid=%d\n", info.psi_lwpid);
DPRINTF("Signal properties: si_signo=%#x si_code=%#x si_errno=%#x\n",
info.psi_siginfo.si_signo, info.psi_siginfo.si_code,
info.psi_siginfo.si_errno);
ATF_REQUIRE_EQ(info.psi_siginfo.si_signo, sigval);
ATF_REQUIRE_EQ(info.psi_siginfo.si_code, TRAP_EXEC);
DPRINTF("Before resuming the child process where it left off and "
"without signal to be sent\n");
SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
}
/// ----------------------------------------------------------------------------
#if defined(TWAIT_HAVE_PID)
ATF_TC(attach1);
ATF_TC_HEAD(attach1, tc)
@ -6969,6 +7030,8 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, traceme_vfork_breakpoint);
ATF_TP_ADD_TC(tp, traceme_vfork_exec);
ATF_TP_ADD_TC_HAVE_PID(tp, attach1);
ATF_TP_ADD_TC_HAVE_PID(tp, attach2);
ATF_TP_ADD_TC(tp, attach3);