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# HG changeset patch
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# User zgu
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# Date 1579696811 18000
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# Wed Jan 22 07:40:11 2020 -0500
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# Node ID 91ea567eeabeade6b3f8d6cf10c02ba53f700eca
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# Parent 082f1d3eb1649ff776cda165ed78d65bc7361ebc
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8237396: JvmtiTagMap::weak_oops_do() should not trigger barriers
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Reviewed-by: stefank, rkennke
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diff --git a/src/hotspot/share/prims/jvmtiTagMap.cpp b/src/hotspot/share/prims/jvmtiTagMap.cpp
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--- a/src/hotspot/share/prims/jvmtiTagMap.cpp
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+++ b/src/hotspot/share/prims/jvmtiTagMap.cpp
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@@ -1,5 +1,5 @@
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/*
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- * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
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+ * Copyright (c) 2003, 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@@ -96,6 +96,11 @@
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inline oop object_peek() {
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return NativeAccess<ON_PHANTOM_OOP_REF | AS_NO_KEEPALIVE>::oop_load(object_addr());
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}
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+
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+ inline oop object_raw() {
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+ return RawAccess<>::oop_load(object_addr());
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+ }
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+
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inline jlong tag() const { return _tag; }
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inline void set_tag(jlong tag) {
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@@ -3357,7 +3362,7 @@
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JvmtiTagHashmapEntry* next = entry->next();
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// has object been GC'ed
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- if (!is_alive->do_object_b(entry->object_peek())) {
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+ if (!is_alive->do_object_b(entry->object_raw())) {
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// grab the tag
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jlong tag = entry->tag();
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guarantee(tag != 0, "checking");
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@@ -3375,7 +3380,7 @@
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++freed;
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} else {
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f->do_oop(entry->object_addr());
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- oop new_oop = entry->object_peek();
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+ oop new_oop = entry->object_raw();
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// if the object has moved then re-hash it and move its
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// entry to its new location.
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@@ -3409,7 +3414,7 @@
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// Re-add all the entries which were kept aside
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while (delayed_add != NULL) {
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JvmtiTagHashmapEntry* next = delayed_add->next();
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- unsigned int pos = JvmtiTagHashmap::hash(delayed_add->object_peek(), size);
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+ unsigned int pos = JvmtiTagHashmap::hash(delayed_add->object_raw(), size);
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delayed_add->set_next(table[pos]);
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table[pos] = delayed_add;
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delayed_add = next;
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