From 27cd7cf8f816f1d1dd465c28a43fc0fcd25c48d6 Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Sun, 5 May 2024 12:27:17 +0900
Subject: feat: limit call stack size

---
 src/Execution/Stack.php | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/Execution/Stack.php')

diff --git a/src/Execution/Stack.php b/src/Execution/Stack.php
index 424f8c6..6d2a2aa 100644
--- a/src/Execution/Stack.php
+++ b/src/Execution/Stack.php
@@ -30,6 +30,9 @@ final class Stack
 
     public function pushFrame(Frame $frame): void
     {
+        if ($this->getCallStackLimit() <= count($this->frames)) {
+            throw new StackOverflowException();
+        }
         $this->push($frame);
         $this->frames[] = $frame;
         $this->currentFrame = $frame;
@@ -179,6 +182,11 @@ final class Stack
         return $this->currentFrame;
     }
 
+    public function getCallStackLimit(): int
+    {
+        return 1024;
+    }
+
     private function push(int|float|Ref|Frame|Label $entry): void
     {
         $this->entries[] = $entry;
-- 
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