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+/*
+ * Test that a fork()ed process terminates after __builtin_trap().
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/resource.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+int main(void)
+{
+ struct rlimit nodump;
+ pid_t err, pid;
+ int wstatus;
+
+ pid = fork();
+ assert(pid != -1);
+ if (pid == 0) {
+ /* We are about to crash on purpose; disable core dumps. */
+ if (getrlimit(RLIMIT_CORE, &nodump)) {
+ return EXIT_FAILURE;
+ }
+ nodump.rlim_cur = 0;
+ if (setrlimit(RLIMIT_CORE, &nodump)) {
+ return EXIT_FAILURE;
+ }
+ /*
+ * An alternative would be to dereference a NULL pointer, but that
+ * would be an UB in C.
+ */
+ printf("about to trigger fault...\n");
+#if defined(__MICROBLAZE__)
+ /*
+ * gcc emits "bri 0", which is an endless loop.
+ * Take glibc's ABORT_INSTRUCTION.
+ */
+ asm volatile("brki r0,-1");
+#else
+ __builtin_trap();
+#endif
+ }
+ err = waitpid(pid, &wstatus, 0);
+ assert(err == pid);
+ assert(WIFSIGNALED(wstatus));
+ printf("faulting thread exited cleanly\n");
+
+ return EXIT_SUCCESS;
+}