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8266453: Shenandoah: Disable write protections before patching nmethod in nmethod_barrier on MacOSX/AArch64

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Reviewed-by: rkennke
This commit is contained in:
Zhengyu Gu 2021-05-05 13:00:17 +00:00
parent a05e8e2422
commit 61bb6eca3e
1 changed files with 4 additions and 1 deletions
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5
src/hotspot/share/gc/shenandoah/shenandoahBarrierSetNMethod.cpp
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@ -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 @@ bool ShenandoahBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) {
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