From c4ae6cb5005cfa53be0af466a5619e7455c15744 Mon Sep 17 00:00:00 2001
From: Samuel Williams <samuel.williams@oriontransfer.co.nz>
Date: Thu, 17 Apr 2025 22:21:51 +0900
Subject: Prefer `th->ec` for stack base/size. (#13101)

---
 test/-ext-/stack/test_stack_overflow.rb | 53 +++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 test/-ext-/stack/test_stack_overflow.rb

(limited to 'test/-ext-/stack')

diff --git a/test/-ext-/stack/test_stack_overflow.rb b/test/-ext-/stack/test_stack_overflow.rb
new file mode 100644
index 0000000000..eadf6d292a
--- /dev/null
+++ b/test/-ext-/stack/test_stack_overflow.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+require 'test/unit'
+
+class Test_StackOverflow < Test::Unit::TestCase
+  def test_proc_overflow
+    omit("Windows stack overflow handling is missing") if RUBY_PLATFORM =~ /mswin|win32|mingw/
+
+    assert_separately([], <<~RUBY)
+      # GC may try to scan the top of the stack and cause a SEGV.
+      GC.disable
+      require '-test-/stack'
+
+      assert_raise(SystemStackError) do
+        Thread.alloca_overflow
+      end
+    RUBY
+  end
+
+  def test_thread_stack_overflow
+    omit("Windows stack overflow handling is missing") if RUBY_PLATFORM =~ /mswin|win32|mingw/
+
+    assert_separately([], <<~RUBY)
+      require '-test-/stack'
+      GC.disable
+
+      thread = Thread.new do
+        Thread.current.report_on_exception = false
+        Thread.alloca_overflow
+      end
+
+      assert_raise(SystemStackError) do
+        thread.join
+      end
+    RUBY
+  end
+
+  def test_fiber_stack_overflow
+    omit("Windows stack overflow handling is missing") if RUBY_PLATFORM =~ /mswin|win32|mingw/
+
+    assert_separately([], <<~RUBY)
+      require '-test-/stack'
+      GC.disable
+
+      fiber = Fiber.new do
+        Thread.alloca_overflow
+      end
+
+      assert_raise(SystemStackError) do
+        fiber.resume
+      end
+    RUBY
+  end
+end
-- 
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