tests: Check that no-breakpoints restore works

v2: Don't clear_breakpoints too.
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/cr-restore.c

@@ -1869,6 +1869,9 @@ static int clear_breakpoints()
 	struct pstree_item *item;
 	int ret = 0, i;
 
+	if (fault_injected(FI_NO_BREAKPOINTS))
+		return 0;
+
 	for_each_pstree_item(item) {
 		if (!task_alive(item))
 			continue;

criu/include/fault-injection.h

@@ -10,6 +10,7 @@ enum faults {
 	/* not fatal */
 	FI_CHECK_OPEN_HANDLE = 128,
 	FI_NO_MEMFD = 129,
+	FI_NO_BREAKPOINTS = 130,
 	FI_MAX,
 };
 

criu/parasite-syscall.c

@@ -1403,7 +1403,11 @@ int ptrace_stop_pie(pid_t pid, void *addr, enum trace_flags *tf)
 {
 	int ret;
 
-	ret = ptrace_set_breakpoint(pid, addr);
+	if (fault_injected(FI_NO_BREAKPOINTS)) {
+		pr_debug("Force no-breakpoints restore\n");
+		ret = 0;
+	} else
+		ret = ptrace_set_breakpoint(pid, addr);
 	if (ret < 0)
 		return ret;
 

test/jenkins/criu-fault.sh

@@ -7,3 +7,4 @@ prep
 ./test/zdtm.py run -t zdtm/static/maps00 --fault 3 --keep-going --report report -f h || fail
 ./test/zdtm.py run -t zdtm/static/inotify_irmap --fault 128 --keep-going --pre 2 -f uns || fail
 ./test/zdtm.py run -t zdtm/static/env00 --fault 129 -f uns || fail
+./test/zdtm.py run -t zdtm/transition/fork --fault 130 -f h || fail