diff --git a/common/debug.c b/common/debug.c
index febedfe84..dc6e70ecf 100644
--- a/common/debug.c
+++ b/common/debug.c
@@ -1,16 +1,62 @@
+#include <backtrace.h>
+#include <ccan/err/err.h>
 #include <ccan/str/str.h>
 #include <common/debug.h>
 #include <common/dev_disconnect.h>
+#include <common/status.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/types.h>
 #include <unistd.h>
 
+static struct backtrace_state *backtrace_state;
+
+static int backtrace_status(void *unused, uintptr_t pc,
+			    const char *filename, int lineno,
+			    const char *function)
+{
+	status_trace("backtrace: %s:%u (%s) %p",
+		     filename, lineno, function, (void *)pc);
+	return 0;
+}
+
+static void crashdump(int sig)
+{
+	/* We do stderr first, since it's most reliable. */
+	warnx("Fatal signal %u", sig);
+	backtrace_print(backtrace_state, 0, stderr);
+
+	/* Now send to parent. */
+	backtrace_full(backtrace_state, 0, backtrace_status, NULL, NULL);
+	status_failed(STATUS_FAIL_INTERNAL_ERROR, "FATAL SIGNAL %u", sig);
+}
+
+static void crashlog_activate(void)
+{
+	struct sigaction sa;
+
+	sa.sa_handler = crashdump;
+	sigemptyset(&sa.sa_mask);
+
+	/* We want to fall through to default handler */
+	sa.sa_flags = SA_RESETHAND;
+	sigaction(SIGILL, &sa, NULL);
+	sigaction(SIGABRT, &sa, NULL);
+	sigaction(SIGFPE, &sa, NULL);
+	sigaction(SIGSEGV, &sa, NULL);
+	sigaction(SIGBUS, &sa, NULL);
+}
+
 void subdaemon_debug(int argc, char *argv[])
 {
 	int i;
 	bool printed = false;
 
+	err_set_progname(argv[0]);
+	backtrace_state = backtrace_create_state(argv[0], 0, NULL, NULL);
+	crashlog_activate();
+
 	for (i = 1; i < argc; i++) {
 		if (strstarts(argv[i], "--dev-disconnect=")) {
 			dev_disconnect_init(atoi(argv[i]