Mercurial > hg > graal-compiler
view src/share/vm/utilities/nativeCallStack.hpp @ 21826:41c3c456e326 jdk8u45-b01
Merge
author | asaha |
---|---|
date | Fri, 12 Dec 2014 14:39:40 -0800 |
parents | c6211b707068 |
children |
line wrap: on
line source
/* * Copyright (c) 2014, 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. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_UTILITIES_NATIVE_CALL_STACK_HPP #define SHARE_VM_UTILITIES_NATIVE_CALL_STACK_HPP #include "memory/allocation.hpp" #include "services/nmtCommon.hpp" #include "utilities/ostream.hpp" /* * This class represents a native call path (does not include Java frame) * * This class is developed in the context of native memory tracking, it can * be an useful tool for debugging purpose. * * For example, following code should print out native call path: * * .... * NativeCallStack here; * here.print_on(tty); * .... * * However, there are a couple of restrictions on this class. If the restrictions are * not strictly followed, it may break native memory tracking badly. * * 1. Number of stack frames to capture, is defined by native memory tracking. * 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 NativeCallStack : public StackObj { public: static const NativeCallStack EMPTY_STACK; private: address _stack[NMT_TrackingStackDepth]; int _hash_value; public: NativeCallStack(int toSkip = 0, bool fillStack = false); NativeCallStack(address* pc, int frameCount); // if it is an empty stack inline bool is_empty() const { return _stack[0] == NULL; } // number of stack frames captured int frames() const; inline int compare(const NativeCallStack& other) const { return memcmp(_stack, other._stack, sizeof(_stack)); } inline bool equals(const NativeCallStack& other) const { // compare hash values if (hash() != other.hash()) return false; // compare each frame return compare(other) == 0; } inline address get_frame(int index) const { assert(index >= 0 && index < NMT_TrackingStackDepth, "Index out of bound"); return _stack[index]; } // Hash code. Any better algorithm? int hash() const; void print_on(outputStream* out) const; void print_on(outputStream* out, int indent) const; }; #endif