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[src/trunk]: src/tests/lib/libc/sys Add new fork/vfork/posix_spawn ATF tests ...
details: https://anonhg.NetBSD.org/src/rev/57af7d34fcfc
branches: trunk
changeset: 1006833:57af7d34fcfc
user: kamil <kamil%NetBSD.org@localhost>
date: Wed Jan 29 03:51:56 2020 +0000
description:
Add new fork/vfork/posix_spawn ATF tests in t_ptrace_wait*
Add unrelated tracer variation of tests: fork1-16, vfork1-16,
posix_spawn1-16.
All tests pass.
diffstat:
tests/lib/libc/sys/t_ptrace_wait.c | 423 ++++++++++++++++++++++++++++++++++++-
1 files changed, 421 insertions(+), 2 deletions(-)
diffs (truncated from 451 to 300 lines):
diff -r 8975fab677a6 -r 57af7d34fcfc tests/lib/libc/sys/t_ptrace_wait.c
--- a/tests/lib/libc/sys/t_ptrace_wait.c Wed Jan 29 03:17:34 2020 +0000
+++ b/tests/lib/libc/sys/t_ptrace_wait.c Wed Jan 29 03:51:56 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.c,v 1.148 2020/01/23 06:17:21 martin Exp $ */
+/* $NetBSD: t_ptrace_wait.c,v 1.149 2020/01/29 03:51:56 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 1.148 2020/01/23 06:17:21 martin Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.149 2020/01/29 03:51:56 kamil Exp $");
#define __LEGACY_PT_LWPINFO
@@ -3312,6 +3312,374 @@
#if defined(TWAIT_HAVE_PID)
static void
+unrelated_tracer_fork_body(const char *fn, bool trackspawn, bool trackfork,
+ bool trackvfork, bool trackvforkdone)
+{
+ const int sigval = SIGSTOP;
+ struct msg_fds parent_tracee, parent_tracer;
+ const int exitval = 10;
+ const int exitval2 = 0; /* This matched exit status from /bin/echo */
+ pid_t tracee, tracer, wpid;
+ pid_t tracee2 = 0;
+ uint8_t msg = 0xde; /* dummy message for IPC based on pipe(2) */
+#if defined(TWAIT_HAVE_STATUS)
+ int status;
+#endif
+
+ struct ptrace_siginfo info;
+ ptrace_state_t state;
+ const int slen = sizeof(state);
+ ptrace_event_t event;
+ const int elen = sizeof(event);
+
+ char * const arg[] = { __UNCONST("/bin/echo"), NULL };
+
+ DPRINTF("Spawn tracee\n");
+ SYSCALL_REQUIRE(msg_open(&parent_tracee) == 0);
+ tracee = atf_utils_fork();
+ if (tracee == 0) {
+ // Wait for parent to let us crash
+ CHILD_FROM_PARENT("exit tracee", parent_tracee, msg);
+
+ DPRINTF("Before raising %s from child\n", strsignal(sigval));
+ FORKEE_ASSERT(raise(sigval) == 0);
+
+ if (strcmp(fn, "spawn") == 0) {
+ FORKEE_ASSERT_EQ(posix_spawn(&tracee2,
+ arg[0], NULL, NULL, arg, NULL), 0);
+ } else {
+ if (strcmp(fn, "fork") == 0) {
+ FORKEE_ASSERT((tracee2 = fork()) != -1);
+ } else if (strcmp(fn, "vfork") == 0) {
+ FORKEE_ASSERT((tracee2 = vfork()) != -1);
+ }
+
+ if (tracee2 == 0)
+ _exit(exitval2);
+ }
+ FORKEE_REQUIRE_SUCCESS
+ (wpid = TWAIT_GENERIC(tracee2, &status, 0), tracee2);
+
+ forkee_status_exited(status, exitval2);
+
+ DPRINTF("Before exiting of the child process\n");
+ _exit(exitval);
+ }
+
+ DPRINTF("Spawn debugger\n");
+ SYSCALL_REQUIRE(msg_open(&parent_tracer) == 0);
+ tracer = atf_utils_fork();
+ if (tracer == 0) {
+ /* Fork again and drop parent to reattach to PID 1 */
+ tracer = atf_utils_fork();
+ if (tracer != 0)
+ _exit(exitval);
+
+ DPRINTF("Before calling PT_ATTACH from tracee %d\n", getpid());
+ FORKEE_ASSERT(ptrace(PT_ATTACH, tracee, NULL, 0) != -1);
+
+ /* Wait for tracee and assert that it was stopped w/ SIGSTOP */
+ FORKEE_REQUIRE_SUCCESS(
+ wpid = TWAIT_GENERIC(tracee, &status, 0), tracee);
+
+ forkee_status_stopped(status, SIGSTOP);
+
+ DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO for the "
+ "traced process\n");
+ SYSCALL_REQUIRE(
+ ptrace(PT_GET_SIGINFO, tracee, &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);
+
+ FORKEE_ASSERT_EQ(info.psi_siginfo.si_signo, SIGSTOP);
+ FORKEE_ASSERT_EQ(info.psi_siginfo.si_code, SI_USER);
+
+ /* Resume tracee with PT_CONTINUE */
+ FORKEE_ASSERT(ptrace(PT_CONTINUE, tracee, (void *)1, 0) != -1);
+
+ /* Inform parent that tracer has attached to tracee */
+ CHILD_TO_PARENT("tracer ready", parent_tracer, msg);
+
+ /* Wait for parent to tell use that tracee should have exited */
+ CHILD_FROM_PARENT("wait for tracee exit", parent_tracer, msg);
+
+ /* Wait for tracee and assert that it exited */
+ FORKEE_REQUIRE_SUCCESS(
+ wpid = TWAIT_GENERIC(tracee, &status, 0), tracee);
+
+ forkee_status_stopped(status, sigval);
+
+ DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO for the "
+ "traced process\n");
+ SYSCALL_REQUIRE(
+ ptrace(PT_GET_SIGINFO, tracee, &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);
+
+ FORKEE_ASSERT_EQ(info.psi_siginfo.si_signo, sigval);
+ FORKEE_ASSERT_EQ(info.psi_siginfo.si_code, SI_LWP);
+
+ DPRINTF("Set 0%s%s%s%s in EVENT_MASK for the child %d\n",
+ trackspawn ? "|PTRACE_POSIX_SPAWN" : "",
+ trackfork ? "|PTRACE_FORK" : "",
+ trackvfork ? "|PTRACE_VFORK" : "",
+ trackvforkdone ? "|PTRACE_VFORK_DONE" : "", tracee);
+ event.pe_set_event = 0;
+ if (trackspawn)
+ event.pe_set_event |= PTRACE_POSIX_SPAWN;
+ if (trackfork)
+ event.pe_set_event |= PTRACE_FORK;
+ if (trackvfork)
+ event.pe_set_event |= PTRACE_VFORK;
+ if (trackvforkdone)
+ event.pe_set_event |= PTRACE_VFORK_DONE;
+ SYSCALL_REQUIRE(ptrace(PT_SET_EVENT_MASK, tracee, &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, tracee, (void *)1, 0) != -1);
+
+ if ((trackspawn && strcmp(fn, "spawn") == 0) ||
+ (trackfork && strcmp(fn, "fork") == 0) ||
+ (trackvfork && strcmp(fn, "vfork") == 0)) {
+ DPRINTF("Before calling %s() for the tracee %d\n", TWAIT_FNAME,
+ tracee);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(tracee, &status, 0),
+ tracee);
+
+ validate_status_stopped(status, SIGTRAP);
+
+ SYSCALL_REQUIRE(
+ ptrace(PT_GET_PROCESS_STATE, tracee, &state, slen) != -1);
+ if (trackspawn && strcmp(fn, "spawn") == 0) {
+ ATF_REQUIRE_EQ(
+ state.pe_report_event & PTRACE_POSIX_SPAWN,
+ PTRACE_POSIX_SPAWN);
+ }
+ if (trackfork && strcmp(fn, "fork") == 0) {
+ ATF_REQUIRE_EQ(state.pe_report_event & PTRACE_FORK,
+ PTRACE_FORK);
+ }
+ if (trackvfork && strcmp(fn, "vfork") == 0) {
+ ATF_REQUIRE_EQ(state.pe_report_event & PTRACE_VFORK,
+ PTRACE_VFORK);
+ }
+
+ tracee2 = state.pe_other_pid;
+ DPRINTF("Reported ptrace event with forkee %d\n", tracee2);
+
+ DPRINTF("Before calling %s() for the forkee %d of the tracee "
+ "%d\n", TWAIT_FNAME, tracee2, tracee);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(tracee2, &status, 0),
+ tracee2);
+
+ validate_status_stopped(status, SIGTRAP);
+
+ SYSCALL_REQUIRE(
+ ptrace(PT_GET_PROCESS_STATE, tracee2, &state, slen) != -1);
+ if (trackspawn && strcmp(fn, "spawn") == 0) {
+ ATF_REQUIRE_EQ(
+ state.pe_report_event & PTRACE_POSIX_SPAWN,
+ PTRACE_POSIX_SPAWN);
+ }
+ if (trackfork && strcmp(fn, "fork") == 0) {
+ ATF_REQUIRE_EQ(state.pe_report_event & PTRACE_FORK,
+ PTRACE_FORK);
+ }
+ if (trackvfork && strcmp(fn, "vfork") == 0) {
+ ATF_REQUIRE_EQ(state.pe_report_event & PTRACE_VFORK,
+ PTRACE_VFORK);
+ }
+
+ ATF_REQUIRE_EQ(state.pe_other_pid, tracee);
+
+ DPRINTF("Before resuming the forkee process where it left off "
+ "and without signal to be sent\n");
+ SYSCALL_REQUIRE(
+ ptrace(PT_CONTINUE, tracee2, (void *)1, 0) != -1);
+
+ DPRINTF("Before resuming the tracee process where it left off "
+ "and without signal to be sent\n");
+ SYSCALL_REQUIRE(ptrace(PT_CONTINUE, tracee, (void *)1, 0) != -1);
+ }
+
+ if (trackvforkdone && strcmp(fn, "vfork") == 0) {
+ DPRINTF("Before calling %s() for the tracee %d\n", TWAIT_FNAME,
+ tracee);
+ TWAIT_REQUIRE_SUCCESS(
+ wpid = TWAIT_GENERIC(tracee, &status, 0), tracee);
+
+ validate_status_stopped(status, SIGTRAP);
+
+ SYSCALL_REQUIRE(
+ ptrace(PT_GET_PROCESS_STATE, tracee, &state, slen) != -1);
+ ATF_REQUIRE_EQ(state.pe_report_event, PTRACE_VFORK_DONE);
+
+ tracee2 = state.pe_other_pid;
+ DPRINTF("Reported PTRACE_VFORK_DONE event with forkee %d\n",
+ tracee2);
+
+ DPRINTF("Before resuming the tracee process where it left off "
+ "and without signal to be sent\n");
+ SYSCALL_REQUIRE(ptrace(PT_CONTINUE, tracee, (void *)1, 0) != -1);
+ }
+
+
+ if ((trackspawn && strcmp(fn, "spawn") == 0) ||
+ (trackfork && strcmp(fn, "fork") == 0) ||
+ (trackvfork && strcmp(fn, "vfork") == 0)) {
+ DPRINTF("Before calling %s() for the forkee - expected exited"
+ "\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(
+ wpid = TWAIT_GENERIC(tracee2, &status, 0), tracee2);
+
+ validate_status_exited(status, exitval2);
+
+ DPRINTF("Before calling %s() for the forkee - expected no "
+ "process\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_FAILURE(ECHILD,
+ wpid = TWAIT_GENERIC(tracee2, &status, 0));
+ }
+
+ DPRINTF("Before calling %s() for the tracee - expected stopped "
+ "SIGCHLD\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(tracee, &status, 0), tracee);
+
+ validate_status_stopped(status, SIGCHLD);
+
+ DPRINTF("Before resuming the tracee process where it left off and "
+ "without signal to be sent\n");
+ SYSCALL_REQUIRE(ptrace(PT_CONTINUE, tracee, (void *)1, 0) != -1);
+
+ DPRINTF("Before calling %s() for the tracee - expected exited\n",
+ TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(tracee, &status, 0), tracee);
+
+ validate_status_exited(status, exitval);
+
+ /* Inform parent that tracer is exiting normally */
+ CHILD_TO_PARENT("tracer done", parent_tracer, msg);
+
+ DPRINTF("Before exiting of the tracer process\n");
+ _exit(0 /* collect by initproc */);
+ }
+
+ DPRINTF("Wait for the tracer process (direct child) to exit "
+ "calling %s()\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(
+ wpid = TWAIT_GENERIC(tracer, &status, 0), tracer);
+
+ validate_status_exited(status, exitval);
+
+ DPRINTF("Wait for the non-exited tracee process with %s()\n",
+ TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(
+ wpid = TWAIT_GENERIC(tracee, NULL, WNOHANG), 0);
+
+ DPRINTF("Wait for the tracer to attach to the tracee\n");
+ PARENT_FROM_CHILD("tracer ready", parent_tracer, msg);
+
+ DPRINTF("Resume the tracee and let it crash\n");
+ PARENT_TO_CHILD("exit tracee", parent_tracee, msg);
+
+ DPRINTF("Resume the tracer and let it detect crashed tracee\n");
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