From 20c22444baf8d627215b66e767aa0180e545931c Mon Sep 17 00:00:00 2001
From: adam1010 <adammalbright@gmail.com>
Date: Wed, 12 Aug 2015 22:56:25 -0500
Subject: [PATCH] Increase memory during shutdown for Fatal Error handling

---
 app/Config/core.php   |  2 ++
 lib/Cake/Core/App.php | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/app/Config/core.php b/app/Config/core.php
index d2e163418..1f5aa5a1c 100644
--- a/app/Config/core.php
+++ b/app/Config/core.php
@@ -68,6 +68,8 @@
  * - `renderer` - string - The class responsible for rendering uncaught exceptions. If you choose a custom class you
  *   should place the file for that class in app/Lib/Error. This class needs to implement a render method.
  * - `log` - boolean - Should Exceptions be logged?
+ * - `extraFatalErrorMemory` - integer - Increases memory limit at shutdown so fatal errors are logged. Specify
+ *   amount in megabytes or use 0 to disable (default: 4 MB)
  * - `skipLog` - array - list of exceptions to skip for logging. Exceptions that
  *   extend one of the listed exceptions will also be skipped for logging.
  *   Example: `'skipLog' => array('NotFoundException', 'UnauthorizedException')`
diff --git a/lib/Cake/Core/App.php b/lib/Cake/Core/App.php
index fa64f64f4..45ef3ff5c 100644
--- a/lib/Cake/Core/App.php
+++ b/lib/Cake/Core/App.php
@@ -888,6 +888,35 @@ class App {
 		return static::$_packageFormat;
 	}
 
+/**
+ * Increases the PHP "memory_limit" ini setting by the specified amount
+ * in kilobytes
+ *  
+ * @param string $additionalKb Number in kilobytes
+ * @return void
+ */
+	public static function increaseMemoryLimit($additionalKb) {
+		$limit = ini_get("memory_limit");
+		if (!is_string($limit) || !strlen($limit)) {
+			return;
+		}
+		$limit = trim($limit);
+		$units = strtoupper(substr($limit, -1));
+		$current = substr($limit, 0, strlen($limit) - 1);
+		if ($units === "M") {
+			$current = $current * 1024;
+			$units = "K";
+		}
+		if ($units === "G") {
+			$current = $current * 1024 * 1024;
+			$units = "K";
+		}
+
+		if ($units === "K") {
+			ini_set("memory_limit", ceil($current + $additionalKb) . "K");
+		}
+	}
+
 /**
  * Object destructor.
  *
@@ -897,6 +926,14 @@ class App {
  * @return void
  */
 	public static function shutdown() {
+		$megabytes = Configure::read('Error.extraFatalErrorMemory');
+		if ($megabytes === null) {
+			$megabytes = 4;
+		}
+		if ($megabytes !== false && $megabytes > 0) {
+			static::increaseMemoryLimit($megabytes * 1024);
+		}
+
 		if (static::$_cacheChange) {
 			Cache::write('file_map', array_filter(static::$_map), '_cake_core_');
 		}