--- /dev/null
+\version "2.15.12"
+#(ly:set-option 'warning-as-error #f)
+
+\header {
+ texidoc = "Markups have a maximum depth to prevent non-termination."
+
+}
+
+% A simple markup function that calls itself and increases its argument, so
+% it will grow forever, unless we terminate it.
+#(define-markup-command (recursive-explosion layout props nr)
+ (number?)
+ (interpret-markup layout props (make-recursive-explosion-markup (+ nr 1))))
+
+\markup { Test: \recursive-explosion #1 }
#include "modified-font-metric.hh"
#include "output-def.hh"
#include "pango-font.hh"
+#include "program-option.hh"
#include "international.hh"
#include "warn.hh"
}
}
+ /* Check for non-terminating markups, e.g. recursive calls with
+ * changing arguments */
+ SCM opt_depth = ly_get_option (ly_symbol2scm ("max-markup-depth"));
+ size_t max_depth = robust_scm2int(opt_depth, 1024);
+ if (depth > max_depth)
+ {
+ string name = ly_symbol2string (scm_procedure_name (func));
+ // TODO: Also print the arguments of the markup!
+ non_fatal_error (_f("Markup depth exceeds maximal value of %d; "
+ "Markup: %s", max_depth, name.c_str ()));
+ return Stencil().smobbed_copy ();
+ }
+
encountered_markups.push_back (markup);
SCM retval = scm_apply_2 (func, layout_smob, props, args);
encountered_markups.pop_back ();
(log-file #f
"If string FOO is given as argument, redirect
output to log file `FOO.log'.")
+ (max-markup-depth 1024
+"Maximum depth for the markup tree. If a markup has more levels, assume that
+it will not terminate at all and print out a warning, but continue processing.")
(midi-extension ,(if (eq? PLATFORM 'windows)
"mid"
"midi")