Set strace_child only in the right branch
"strace_child = pid" assignment was racing in NOMMU case
because of vfork (no way to know which process would win).
After this change, strace_child is set to nonzero only
in one process after [v]fork.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
diff --git a/strace.c b/strace.c
index 1415aab..4fb1b46 100644
--- a/strace.c
+++ b/strace.c
@@ -1204,7 +1204,7 @@
prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY);
#endif
- strace_child = pid = fork();
+ pid = fork();
if (pid < 0) {
perror_msg_and_die("fork");
}
@@ -1221,6 +1221,7 @@
/* We are the tracer */
if (!daemonized_tracer) {
+ strace_child = pid;
if (!use_seize) {
/* child did PTRACE_TRACEME, nothing to do in parent */
} else {