+#define LTTNG_SYMBOL_NAME_LEN 256
+
+/*
+ * PROC(5) mentions that PID_MAX_LIMIT may not exceed 2^22 on 64-bit HW.
+ * We prefer to use 32-bits for simplicity's sake.
+ */
+#define LTTNG_MAX_PID INT32_MAX
+#define LTTNG_MAX_PID_STR "2147483647"
+
+#define LTTNG_NAME_MAX 255
+
+/*
+ * POSIX guarantees that a host name will not exceed 255 characters.
+ * Moreover, RFC 1035 limits the length of a fully qualified domain name (FQDN)
+ * to 255 characters.
+ *
+ * 256 is used to include a trailing NULL character.
+ */
+#define LTTNG_HOST_NAME_MAX 256
+
+#define LTTNG_PATH_MAX 4096