From 2029349f5291ae10048202732a89f34c0a179130 Mon Sep 17 00:00:00 2001
From: "Liam P. White" <inkscapebrony@gmail.com>
Date: Wed, 6 Aug 2014 20:40:19 -0400
Subject: Add in some debugging code that will complain when deleted knots are
 accessed by snap handler

(bzr r13341.1.120)
---
 src/knot-ptr.cpp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 src/knot-ptr.cpp

(limited to 'src/knot-ptr.cpp')

diff --git a/src/knot-ptr.cpp b/src/knot-ptr.cpp
new file mode 100644
index 000000000..de8118ba7
--- /dev/null
+++ b/src/knot-ptr.cpp
@@ -0,0 +1,25 @@
+#include <algorithm>
+#include <glib.h>
+#include <list>
+#include "knot-ptr.h"
+
+static std::list<void*> deleted_knots;
+
+void knot_deleted_callback(void* knot) {
+    if (std::find(deleted_knots.begin(), deleted_knots.end(), knot) == deleted_knots.end()) {
+        deleted_knots.push_back(knot);
+    }
+}
+
+void knot_created_callback(void* knot) {
+    std::list<void*>::iterator it = std::find(deleted_knots.begin(), deleted_knots.end(), knot);
+    if (it != deleted_knots.end()) {
+        deleted_knots.erase(it);
+    }
+}
+
+void check_if_knot_deleted(void* knot) {
+    if (std::find(deleted_knots.begin(), deleted_knots.end(), knot) != deleted_knots.end()) {
+        g_warning("Accessed knot after it was freed at %p", knot);
+    }
+}
-- 
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