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reaper: process-group signal broadcast, dynamic drain, and aarch64 register fix

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mrkmntal 2026-08-28 22:19:47 -04:00
commit 15f74616d5
2 changed files with 69 additions and 30 deletions
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11
tuxreaperdgnu.c
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@ -138,6 +138,9 @@ int main(int argc, char *argv[]) {
}
if (g_main_child == 0) {
// Become the leader of a new process group so the parent can
// target the whole workload tree with kill(-g_main_child, sig).
setpgid(0, 0);
sigprocmask(SIG_SETMASK, &old_mask, NULL);
execvp(argv[1], &argv[1]);
perror("execvp");
@ -148,14 +151,18 @@ int main(int argc, char *argv[]) {
while (!g_child_exited) {
sigsuspend(&old_mask);
// Dynamic zombie drain: reap any terminated descendants so they
// do not clog the process table while the workload is running.
while (waitpid(-1, NULL, WNOHANG) > 0);
if (g_pending_signal != 0) {
int sig = g_pending_signal;
g_pending_signal = 0;
if (sig == APACHE_IN_SIG) {
proc_remap_signal(APACHE_IN_SIG, APACHE_OUT_SIG, apache_exes);
} else {
// Unmapped signals get the old broadcast treatment.
kill(-1, sig);
// Broadcast unmapped signals to the workload process group.
kill(-g_main_child, sig);
}
}
}