1 files changed, 45 insertions, 0 deletions
diff --git a/src/lib/err/torerr_sys.c b/src/lib/err/torerr_sys.c
new file mode 100644
index 0000000000..8ee1521f3b
--- /dev/null
+++ b/src/lib/err/torerr_sys.c
@@ -0,0 +1,45 @@
+/* Copyright (c) 2018-2020, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file torerr_sys.c
+ * \brief Subsystem object for the error handling subsystem.
+ **/
+
+#include "orconfig.h"
+#include "lib/err/backtrace.h"
+#include "lib/err/torerr.h"
+#include "lib/err/torerr_sys.h"
+#include "lib/subsys/subsys.h"
+#include "lib/version/torversion.h"
+
+#include <stddef.h>
+
+static int
+subsys_torerr_initialize(void)
+{
+  if (configure_backtrace_handler(get_version()) < 0)
+    return -1;
+  tor_log_reset_sigsafe_err_fds();
+
+  return 0;
+}
+static void
+subsys_torerr_shutdown(void)
+{
+  /* Stop handling signals with backtraces, then flush the logs. */
+  clean_up_backtrace_handler();
+  tor_log_flush_sigsafe_err_fds();
+}
+
+const subsys_fns_t sys_torerr = {
+  .name = "err",
+  SUBSYS_DECLARE_LOCATION(),
+  /* Low-level error handling is a diagnostic feature, we want it to init
+   * right after windows process security, and shutdown last.
+   * (Security never shuts down.) */
+  .level = -99,
+  .supported = true,
+  .initialize = subsys_torerr_initialize,
+  .shutdown = subsys_torerr_shutdown
+};