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src/hotspot/share/utilities/nativeCallStack.hpp
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2018, Oracle and/or its affiliates. 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
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
@@ -49,22 +49,27 @@
* This number has impacts on how much memory to be used by native
* memory tracking.
* 2. The class is strict stack object, no heap or virtual memory can be allocated
* from it.
*/
+class MemTracker;
+
class NativeCallStack : public StackObj {
- public:
- static const NativeCallStack EMPTY_STACK;
+ friend class MemTracker;
- private:
+private:
address _stack[NMT_TrackingStackDepth];
unsigned int _hash_value;
- public:
+ static NativeCallStack EMPTY_STACK;
+public:
NativeCallStack(int toSkip = 0, bool fillStack = false);
NativeCallStack(address* pc, int frameCount);
+ static inline const NativeCallStack& empty_stack() {
+ return EMPTY_STACK;
+ }
// if it is an empty stack
inline bool is_empty() const {
return _stack[0] == NULL;
}
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