+(define-condition c-string-encoding-error (character-encoding-error)
+ ()
+ (:report
+ (lambda (c s)
+ (format s "~@<c-string encoding error (:external-format ~S): ~2I~_~
+ the character with code ~D cannot be encoded.~@:>"
+ (character-coding-error-external-format c)
+ (character-encoding-error-code c)))))
+
+(define-condition c-string-decoding-error (character-decoding-error)
+ ()
+ (:report
+ (lambda (c s)
+ (format s "~@<c-string decoding error (:external-format ~S): ~2I~_~
+ the octet sequence ~S cannot be decoded.~@:>"
+ (character-coding-error-external-format c)
+ (character-decoding-error-octets c)))))
+
+(define-condition control-stack-exhausted (storage-condition)
+ ()
+ (:report
+ (lambda (condition stream)
+ (declare (ignore condition))
+ (format stream
+ ;; no pretty-printing, because that would use a lot of stack.
+ "Control stack exhausted (no more space for function call frames).
+This is probably due to heavily nested or infinitely recursive function
+calls, or a tail call that SBCL cannot or has not optimized away.
+
+PROCEED WITH CAUTION."))))
+
+(define-condition heap-exhausted-error (storage-condition)
+ ()
+ (:report
+ (lambda (condition stream)
+ (declare (ignore condition))
+ (declare (special *heap-exhausted-error-available-bytes*
+ *heap-exhausted-error-requested-bytes*))
+ ;; See comments in interr.lisp -- there is a method to this madness.
+ (if (and (boundp '*heap-exhausted-error-available-bytes*)
+ (boundp '*heap-exhausted-error-requested-bytes*))
+ (format stream
+ ;; no pretty-printing, because that will use a lot of heap.
+ "Heap exhausted (no more space for allocation).
+There are still ~D bytes available; the request was for ~D bytes.
+
+PROCEED WITH CAUTION."
+ *heap-exhausted-error-available-bytes*
+ *heap-exhausted-error-requested-bytes*)
+ (format stream
+ "A ~S condition without bindings for heap statistics. (If
+you did not expect to see this message, please report it."
+ 'heap-exhausted-error)))))
+
+(define-condition system-condition (condition)
+ ((address :initarg :address :reader system-condition-address :initform nil)
+ (context :initarg :context :reader system-condition-context :initform nil)))
+
+(define-condition memory-fault-error (system-condition error) ()
+ (:report
+ (lambda (condition stream)
+ (format stream "Unhandled memory fault at #x~X."
+ (system-condition-address condition)))))
+
+(define-condition breakpoint-error (system-condition error) ()
+ (:report
+ (lambda (condition stream)
+ (format stream "Unhandled breakpoint/trap at #x~X."
+ (system-condition-address condition)))))
+
+(define-condition interactive-interrupt (system-condition serious-condition) ()
+ (:report
+ (lambda (condition stream)
+ (format stream "Interactive interrupt at #x~X."
+ (system-condition-address condition)))))