Extract error functionality into a new lowest-level library.

1 files changed, 47 insertions, 0 deletions

diff --git a/src/lib/err/torerr.h b/src/lib/err/torerr.h
new file mode 100644
index 0000000000..10d9f481c0
--- /dev/null
+++ b/src/lib/err/torerr.h
@@ -0,0 +1,47 @@
+/* Copyright (c) 2001, Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file torerr.h
+ *
+ * \brief Headers for torerr.c.
+ **/
+
+#ifndef TOR_TORERR_H
+#define TOR_TORERR_H
+
+#include "common/compat_compiler.h"
+
+/* The raw_assert...() variants are for use within code that can't call
+ * tor_assertion_failed_() because of call circularity issues. */
+#define raw_assert(expr) STMT_BEGIN                                     \
+    if (!(expr)) {                                                      \
+      tor_raw_assertion_failed_msg_(__FILE__, __LINE__, #expr, NULL);   \
+      abort();                                                          \
+    }                                                                   \
+  STMT_END
+#define raw_assert_unreached(expr) raw_assert(0)
+#define raw_assert_unreached_msg(msg) STMT_BEGIN                    \
+    tor_raw_assertion_failed_msg_(__FILE__, __LINE__, "0", (msg));  \
+    abort();                                                        \
+  STMT_END
+
+void tor_raw_assertion_failed_msg_(const char *file, int line,
+                                   const char *expr,
+                                   const char *msg);
+
+/** Maximum number of fds that will get notifications if we crash */
+#define TOR_SIGSAFE_LOG_MAX_FDS 8
+
+void tor_log_err_sigsafe(const char *m, ...);
+int tor_log_get_sigsafe_err_fds(const int **out);
+void tor_log_set_sigsafe_err_fds(const int *fds, int n);
+void tor_log_sigsafe_err_set_granularity(int ms);
+
+int format_hex_number_sigsafe(unsigned long x, char *buf, int max_len);
+int format_dec_number_sigsafe(unsigned long x, char *buf, int max_len);
+
+#endif /* !defined(TOR_TORLOG_H) */