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[src/trunk]: src/tests/lib/libc/sys Add new ATF ptrace(2) test in t_ptrace_wait*



details:   https://anonhg.NetBSD.org/src/rev/189a553f5b81
branches:  trunk
changeset: 969014:189a553f5b81
user:      kamil <kamil%NetBSD.org@localhost>
date:      Tue Feb 04 21:34:12 2020 +0000

description:
Add new ATF ptrace(2) test in t_ptrace_wait*

threads_and_exec - verify that the expected LWP events are reported for a
multithreaded process that calls execve(2).

Test passes.

diffstat:

 tests/lib/libc/sys/t_ptrace_wait.c |  195 ++++++++++++++++++++++++++++++++++++-
 1 files changed, 193 insertions(+), 2 deletions(-)

diffs (223 lines):

diff -r 76e9acee52e6 -r 189a553f5b81 tests/lib/libc/sys/t_ptrace_wait.c
--- a/tests/lib/libc/sys/t_ptrace_wait.c        Tue Feb 04 21:09:03 2020 +0000
+++ b/tests/lib/libc/sys/t_ptrace_wait.c        Tue Feb 04 21:34:12 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_ptrace_wait.c,v 1.150 2020/02/04 15:06:27 kamil Exp $        */
+/*     $NetBSD: t_ptrace_wait.c,v 1.151 2020/02/04 21:34:12 kamil Exp $        */
 
 /*-
  * Copyright (c) 2016, 2017, 2018, 2019 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.150 2020/02/04 15:06:27 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.151 2020/02/04 21:34:12 kamil Exp $");
 
 #define __LEGACY_PT_LWPINFO
 
@@ -7048,6 +7048,195 @@
 
 /// ----------------------------------------------------------------------------
 
+static void *
+thread_and_exec_thread_cb(void *arg __unused)
+{
+
+       execlp("/bin/echo", "/bin/echo", NULL);
+
+       abort();
+}
+
+static void
+threads_and_exec(void)
+{
+       const int sigval = SIGSTOP;
+       pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+       int status;
+#endif
+       ptrace_state_t state;
+       const int slen = sizeof(state);
+       ptrace_event_t event;
+       const int elen = sizeof(event);
+       struct ptrace_siginfo info;
+
+       pthread_t t;
+       lwpid_t lid;
+
+       DPRINTF("Before forking process PID=%d\n", getpid());
+       SYSCALL_REQUIRE((child = fork()) != -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 raising %s from child\n", strsignal(sigval));
+               FORKEE_ASSERT(raise(sigval) == 0);
+
+               FORKEE_ASSERT(pthread_create(&t, NULL,
+                   thread_and_exec_thread_cb, NULL) == 0);
+
+               for (;;)
+                       continue;
+
+               FORKEE_ASSERT(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, SI_LWP);
+
+       DPRINTF("Set LWP event mask for the child %d\n", child);
+       memset(&event, 0, sizeof(event));
+       event.pe_set_event |= PTRACE_LWP_CREATE | PTRACE_LWP_EXIT;
+       SYSCALL_REQUIRE(ptrace(PT_SET_EVENT_MASK, child, &event, elen) != -1);
+
+       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 - expected stopped "
+           "SIGTRAP\n", TWAIT_FNAME);
+       TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0),
+           child);
+
+       validate_status_stopped(status, SIGTRAP);
+
+       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, SIGTRAP);
+       ATF_REQUIRE_EQ(info.psi_siginfo.si_code, TRAP_LWP);
+
+       SYSCALL_REQUIRE(
+           ptrace(PT_GET_PROCESS_STATE, child, &state, slen) != -1);
+
+       ATF_REQUIRE_EQ_MSG(state.pe_report_event, PTRACE_LWP_CREATE,
+           "%d != %d", state.pe_report_event, PTRACE_LWP_CREATE);
+
+       lid = state.pe_lwp;
+       DPRINTF("Reported PTRACE_LWP_CREATE event with lid %d\n", lid);
+
+       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 - expected stopped "
+           "SIGTRAP\n", TWAIT_FNAME);
+       TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0),
+           child);
+
+       validate_status_stopped(status, SIGTRAP);
+
+       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, SIGTRAP);
+       ATF_REQUIRE_EQ(info.psi_siginfo.si_code, TRAP_LWP);
+
+       SYSCALL_REQUIRE(
+           ptrace(PT_GET_PROCESS_STATE, child, &state, slen) != -1);
+
+       ATF_REQUIRE_EQ_MSG(state.pe_report_event, PTRACE_LWP_EXIT,
+           "%d != %d", state.pe_report_event, PTRACE_LWP_EXIT);
+
+       lid = state.pe_lwp;
+       DPRINTF("Reported PTRACE_LWP_EXIT event with lid %d\n", lid);
+
+       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 - expected stopped "
+           "SIGTRAP\n", TWAIT_FNAME);
+       TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0),
+           child);
+
+       validate_status_stopped(status, SIGTRAP);
+
+       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, SIGTRAP);
+       ATF_REQUIRE_EQ(info.psi_siginfo.si_code, TRAP_EXEC);
+
+       SYSCALL_REQUIRE(ptrace(PT_KILL, child, NULL, 0) != -1);
+
+       DPRINTF("Before calling %s() for the child - expected exited\n",
+           TWAIT_FNAME);
+       TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+       validate_status_signaled(status, SIGKILL, 0);
+
+       DPRINTF("Before calling %s() for the child - expected no process\n",
+           TWAIT_FNAME);
+       TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
+}
+
+ATF_TC(threads_and_exec);
+ATF_TC_HEAD(threads_and_exec, tc)
+{
+        atf_tc_set_md_var(tc, "descr",
+            "Verify that multithreaded application on exec() will report "
+           "LWP_EXIT events");
+}
+
+ATF_TC_BODY(threads_and_exec, tc)
+{
+
+        threads_and_exec();
+}
+
+/// ----------------------------------------------------------------------------
+
 volatile lwpid_t the_lwp_id = 0;
 
 static void
@@ -9261,6 +9450,8 @@
        ATF_TP_ADD_TC_HAVE_PID(tp, vforkdone_singalmasked);
        ATF_TP_ADD_TC_HAVE_PID(tp, vforkdone_singalignored);
 
+       ATF_TP_ADD_TC(tp, threads_and_exec);
+
        ATF_TP_ADD_TC(tp, signal9);
        ATF_TP_ADD_TC(tp, signal10);
 



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