Eat pending SIGSTOP _before_ PTRACE_DETACH in detach()
* strace.c (detach): If TCB_IGNORE_ONE_SIGSTOP is set,
di not PTRACE_DETACH - wait for SIGSTOP first.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
diff --git a/strace.c b/strace.c
index 89e89bc..55089bf 100644
--- a/strace.c
+++ b/strace.c
@@ -758,6 +758,8 @@
* would be left stopped (process state T).
*/
sigstop_expected = (tcp->flags & TCB_IGNORE_ONE_SIGSTOP);
+ if (sigstop_expected)
+ goto wait_loop;
error = ptrace(PTRACE_DETACH, tcp->pid, 0, 0);
if (error == 0) {
/* On a clear day, you can see forever. */
@@ -802,6 +804,7 @@
}
if (sigstop_expected || interrupt_done) {
+ wait_loop:
for (;;) {
int sig;
if (waitpid(tcp->pid, &status, __WALL) < 0) {