Squash commits for public release

test/kernel/signal/signalchild/main.c

@@ -0,0 +1,36 @@
+#include <sched.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+const int calls = 10;
+volatile int ret = calls;
+
+void save_on_terminate()
+{
+    ret--;
+}
+
+int main(int argc, char** argv)
+{
+    int pid = fork();
+    if (pid) {
+        for (int i = 0; i < 4; i++) {
+            // Waiting until child setup its sigaction.
+            sched_yield();
+        }
+
+        for (int i = 0; i < calls; i++) {
+            kill(pid, 3);
+            sched_yield();
+        }
+
+        waitpid(pid, (int*)&ret, 0);
+    } else {
+        sigaction(3, save_on_terminate);
+        while (ret) { }
+    }
+    return ret;
+}