8266453: Shenandoah: Disable write protections before patching nmethod in nmethod_barrier on MacOSX/AArch64
Reviewed-by: rkennke
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahBarrierSetNMethod.cpp b/src/hotspot/share/gc/shenandoah/shenandoahBarrierSetNMethod.cpp
index c346c92..ebc288e 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahBarrierSetNMethod.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahBarrierSetNMethod.cpp
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2019, Red Hat, Inc. All rights reserved.
+ * Copyright (c) 2019, 2021, Red Hat, Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -33,6 +33,7 @@
#include "gc/shenandoah/shenandoahThreadLocalData.hpp"
#include "memory/iterator.hpp"
#include "memory/resourceArea.hpp"
+#include "runtime/threadWXSetters.inline.hpp"
bool ShenandoahBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) {
ShenandoahReentrantLock* lock = ShenandoahNMethod::lock_for_nmethod(nm);
@@ -45,6 +46,8 @@
return true;
}
+ MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, Thread::current());)
+
if (nm->is_unloading()) {
// We don't need to take the lock when unlinking nmethods from
// the Method, because it is only concurrently unlinked by
