From d448622ff4e47e136cbc20104a1f6a82f17e860d Mon Sep 17 00:00:00 2001
From: Guy Sartorelli <guy.sartorelli@silverstripe.com>
Date: Thu, 23 Jun 2022 15:17:33 +1200
Subject: [PATCH] ENH Allow subclasses to be defined for backtrace filtered
 functions.

---
 src/Dev/Backtrace.php | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/Dev/Backtrace.php b/src/Dev/Backtrace.php
index 1aa6cde74..deae15921 100644
--- a/src/Dev/Backtrace.php
+++ b/src/Dev/Backtrace.php
@@ -81,9 +81,9 @@ class Backtrace
             $match = false;
             if (!empty($frame['class'])) {
                 foreach ($ignoredArgs as $fnSpec) {
-                    if (is_array($fnSpec) &&
-                        ('*' == $fnSpec[0] || $frame['class'] == $fnSpec[0]) &&
-                        $frame['function'] == $fnSpec[1]
+                    if (is_array($fnSpec)
+                        && self::matchesFilterableClass($frame['class'], $fnSpec[0])
+                        && $frame['function'] == $fnSpec[1]
                     ) {
                         $match = true;
                         break;
@@ -202,4 +202,13 @@ class Backtrace
         }
         return $result;
     }
+
+    /**
+     * Checks if the filterable class is wildcard, of if the class name is the filterable class, or a subclass of it,
+     * or implements it.
+     */
+    private static function matchesFilterableClass(string $className, string $filterableClass): bool
+    {
+        return $filterableClass === '*' || $className === $filterableClass || is_subclass_of($className, $filterableClass);
+    }
 }