From 5895ca772ab4aa51b29dbee9e4cf478c0c71ccab Mon Sep 17 00:00:00 2001
From: Evgeny Astigeevich <eastig@amazon.com>
Date: Wed, 10 Jun 2026 20:01:03 +0000
Subject: [PATCH] Add assert to windows SuspendedThreadTask::internal_do_task

---
 src/hotspot/os/windows/os_windows.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/hotspot/os/windows/os_windows.cpp b/src/hotspot/os/windows/os_windows.cpp
index d00babef40f..2b74cccb072 100644
--- a/src/hotspot/os/windows/os_windows.cpp
+++ b/src/hotspot/os/windows/os_windows.cpp
@@ -6058,6 +6058,11 @@ static inline HANDLE get_thread_handle_for_extended_context(DWORD tid) {
 // Thread sampling implementation
 //
 void SuspendedThreadTask::internal_do_task() {
+#if INCLUDE_JFR
+  assert(NOT_COMPILER2(true) COMPILER2_PRESENT(!HotCodeHeap) ||
+         SuspendedThreadTask_lock->owned_by_self(),
+         "suspend/resume must be serialized when HotCodeHeap is enabled");
+#endif
   const HANDLE h = get_thread_handle_for_extended_context(_thread->osthread()->thread_id());
   if (h == nullptr) {
     return;