Added ability to dump memory

src/pocketmine/MemoryManager.php

@@ -260,4 +260,128 @@ class MemoryManager{
 			"object" => $includeObject ? $object : null
 		];
 	}
+
+	public function dumpServerMemory($outputFolder, $maxNesting, $maxStringSize){
+		gc_enable();
+		gc_collect_cycles(); //Cleanup counts
+
+		if(!file_exists($outputFolder)){
+			mkdir($outputFolder, 0777, true);
+		}
+
+		$this->server->getLogger()->notice("[Dump] After the memory dump is done, the server might crash");
+
+		$obData = fopen($outputFolder . "/objects.js", "wb+");
+
+		$staticProperties = [];
+
+		$data = [];
+
+		$objects = [];
+
+		$refCounts = [];
+
+		$this->continueDump($this->server, $data, $objects, $refCounts, 0, $maxNesting, $maxStringSize);
+
+		do{
+			$continue = false;
+			foreach($objects as $hash => $object){
+				if(!is_object($object)){
+					continue;
+				}
+				$continue = true;
+
+				$className = get_class($object);
+
+				$objects[$hash] = true;
+
+				$reflection = new \ReflectionObject($object);
+
+				$info = [
+					"information" => "$hash@$className",
+					"properties" => []
+				];
+
+				if($reflection->getParentClass()){
+					$info["parent"] = $reflection->getParentClass()->getName();
+				}
+
+				if(count($reflection->getInterfaceNames()) > 0){
+					$info["implements"] = implode(", ", $reflection->getInterfaceNames());
+				}
+
+				foreach($reflection->getProperties() as $property){
+					if($property->isStatic()){
+						continue;
+					}
+
+					if(!$property->isPublic()){
+						$property->setAccessible(true);
+					}
+					$this->continueDump($property->getValue($object), $info["properties"][$property->getName()], $objects, $refCounts, 0, $maxNesting, $maxStringSize);
+				}
+
+				fwrite($obData, "$hash@$className: ". json_encode($info, JSON_UNESCAPED_SLASHES) . "\n");
+
+				if(!isset($objects["staticProperties"][$className])){
+					$staticProperties[$className] = [];
+					foreach($reflection->getProperties() as $property){
+						if(!$property->isStatic() or $property->getDeclaringClass()->getName() !== $className){
+							continue;
+						}
+
+						if(!$property->isPublic()){
+							$property->setAccessible(true);
+						}
+						$this->continueDump($property->getValue($object), $staticProperties[$className][$property->getName()], $objects, $refCounts, 0, $maxNesting, $maxStringSize);
+					}
+				}
+			}
+
+			echo "[Dump] Wrote " . count($objects) . " objects\n";
+		}while($continue);
+
+		file_put_contents($outputFolder . "/staticProperties.js", json_encode($staticProperties, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT));
+		file_put_contents($outputFolder . "/serverEntry.js", json_encode($data, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT));
+		file_put_contents($outputFolder . "/referenceCounts.js", json_encode($refCounts, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT));
+
+		echo "[Dump] Finished!\n";
+
+		$this->server->forceShutdown();
+	}
+
+	private function continueDump($from, &$data, &$objects, &$refCounts, $recursion, $maxNesting, $maxStringSize){
+		if($maxNesting <= 0){
+			$data = "(error) NESTING LIMIT REACHED";
+			return;
+		}
+
+		--$maxNesting;
+
+		if(is_object($from)){
+			if(!isset($objects[$hash = spl_object_hash($from)])){
+				$objects[$hash] = $from;
+				$refCounts[$hash] = 0;
+			}
+
+			++$refCounts[$hash];
+
+			$data = "(object) $hash@" . get_class($from);
+		}elseif(is_array($from)){
+			if($recursion >= 5){
+				$data = "(error) ARRAY RECURSION LIMIT REACHED";
+				return;
+			}
+			$data = [];
+			foreach($from as $key => $value){
+				$this->continueDump($value, $data[$key], $objects, $refCounts, $recursion + 1, $maxNesting, $maxStringSize);
+			}
+		}elseif(is_string($from)){
+			$data = "(string) len(".strlen($from).") " . substr(Utils::printable($from), 0, $maxStringSize);
+		}elseif(is_resource($from)){
+			$data = "(resource) " . print_r($from, true);
+		}else{
+			$data = $from;
+		}
+	}
 }

src/pocketmine/command/SimpleCommandMap.php

@@ -27,6 +27,7 @@ use pocketmine\command\defaults\BanListCommand;
 use pocketmine\command\defaults\DefaultGamemodeCommand;
 use pocketmine\command\defaults\DeopCommand;
 use pocketmine\command\defaults\DifficultyCommand;
+use pocketmine\command\defaults\DumpMemoryCommand;
 use pocketmine\command\defaults\EffectCommand;
 use pocketmine\command\defaults\GamemodeCommand;
 use pocketmine\command\defaults\GarbageCollectorCommand;
@@ -117,6 +118,7 @@ class SimpleCommandMap implements CommandMap{
 		if($this->server->getProperty("debug.commands", false)){
 			$this->register("pocketmine", new StatusCommand("status"));
 			$this->register("pocketmine", new GarbageCollectorCommand("gc"));
+			$this->register("pocketmine", new DumpMemoryCommand("dumpmemory"));
 		}
 	}
 

src/pocketmine/command/defaults/DumpMemoryCommand.php

@@ -0,0 +1,58 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+namespace pocketmine\command\defaults;
+
+use pocketmine\command\CommandSender;
+use pocketmine\utils\TextFormat;
+use pocketmine\utils\Utils;
+
+class DumpMemoryCommand extends VanillaCommand{
+
+	private static $executions = 0;
+
+	public function __construct($name){
+		parent::__construct(
+			$name,
+			"Dumps the memory",
+			"/$name <TOKEN (run once to get it)> [path]"
+		);
+		$this->setPermission("pocketmine.command.dumpmemory");
+	}
+
+	public function execute(CommandSender $sender, $currentAlias, array $args){
+		if(!$this->testPermission($sender)){
+			return true;
+		}
+
+		$token = strtoupper(substr(sha1(BOOTUP_RANDOM . ":" . $sender->getServer()->getServerUniqueId() . ":" . self::$executions), 6, 6));
+
+		if(count($args) < 1 or strtoupper($args[0]) !== $token){
+			$sender->sendMessage("Usage: /" . $this->getName() . " " . $token);
+			return true;
+		}
+
+		++self::$executions;
+
+		$sender->getServer()->getMemoryManager()->dumpServerMemory(isset($args[1]) ? $args[1] : $sender->getServer()->getDataPath() . "/memoryDump_$token", 48, 80);
+		return true;
+	}
+}

src/pocketmine/command/defaults/StatusCommand.php

@@ -41,7 +41,7 @@ class StatusCommand extends VanillaCommand{
 			return true;
 		}
 
-		$rUsage = Utils::getRealMemoryUsage(true);
+		$rUsage = Utils::getRealMemoryUsage();
 		$mUsage = Utils::getMemoryUsage(true);
 
 		$server = $sender->getServer();

src/pocketmine/permission/DefaultPermissions.php

@@ -117,6 +117,7 @@ abstract class DefaultPermissions{
 		self::registerPermission(new Permission(self::ROOT . ".command.seed", "Allows the user to view the seed of the world", Permission::DEFAULT_OP), $commands);
 		self::registerPermission(new Permission(self::ROOT . ".command.status", "Allows the user to view the server performance", Permission::DEFAULT_OP), $commands);
 		self::registerPermission(new Permission(self::ROOT . ".command.gc", "Allows the user to fire garbage collection tasks", Permission::DEFAULT_OP), $commands);
+		self::registerPermission(new Permission(self::ROOT . ".command.dumpmemory", "Allows the user to dump memory contents", Permission::DEFAULT_OP), $commands);
 		self::registerPermission(new Permission(self::ROOT . ".command.timings", "Allows the user to records timings for all plugin events", Permission::DEFAULT_OP), $commands);
 		self::registerPermission(new Permission(self::ROOT . ".command.spawnpoint", "Allows the user to change player's spawnpoint", Permission::DEFAULT_OP), $commands);
 		self::registerPermission(new Permission(self::ROOT . ".command.setworldspawn", "Allows the user to change the world spawn", Permission::DEFAULT_OP), $commands);