From 46b9ecebc54c26e4616e98673b6684cf81dc1e53 Mon Sep 17 00:00:00 2001
From: "Peter W. Draper" <p.w.draper@durham.ac.uk>
Date: Mon, 12 Sep 2016 12:42:14 +0100
Subject: [PATCH] Add some sanity checking when splitting cells.
This depth is way beyond our precision.
---
src/space.c | 6 ++++++
src/space.h | 3 +++
2 files changed, 9 insertions(+)
diff --git a/src/space.c b/src/space.c
index a9958f6fbd..9c163fede0 100644
--- a/src/space.c
+++ b/src/space.c
@@ -1269,6 +1269,12 @@ void space_split_mapper(void *map_data, int num_elements, void *extra_data) {
atomic_cas(&s->maxdepth, maxdepth, c->depth);
}
+ /* If the depth is too large, we have a problem and should stop. */
+ if (s->maxdepth > space_cell_maxdepth) {
+ error("Exceeded maximum depth (%d) when splitting cells, aborting",
+ space_cell_maxdepth);
+ }
+
/* Split or let it be? */
if (count > space_splitsize || gcount > space_splitsize) {
diff --git a/src/space.h b/src/space.h
index 72b17405f1..5332bc9fb5 100644
--- a/src/space.h
+++ b/src/space.h
@@ -44,6 +44,9 @@
#define space_stretch 1.10f
#define space_maxreldx 0.25f
+/* Maximum allowed depth of cell splits. */
+#define space_cell_maxdepth 52
+
/* Split size. */
extern int space_splitsize;
extern int space_maxsize;
--
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