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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@38809 a592a061-630c-0410-9148-cb99ea01b6c8
117 lines
4.5 KiB
C++
117 lines
4.5 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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//
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// Visual Leak Detector - CallStack Class Definitions
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// Copyright (c) 2005-2006 Dan Moulding
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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//
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// See COPYING.txt for the full terms of the GNU Lesser General Public License.
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//
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////////////////////////////////////////////////////////////////////////////////
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#pragma once
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#ifndef VLDBUILD
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#error \
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"This header should only be included by Visual Leak Detector when building it from source. \
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Applications should never include this header."
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#endif
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#include <windows.h>
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#define CALLSTACKCHUNKSIZE 32 // Number of frame slots in each CallStack chunk.
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////////////////////////////////////////////////////////////////////////////////
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//
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// The CallStack Class
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//
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// CallStack objects can be used for obtaining, storing, and displaying the
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// call stack at a given point during program execution.
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//
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// The primary data structure used by the CallStack is similar in concept to
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// a STL vector, but is specifically tailored for use by VLD, making it more
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// efficient than a standard STL vector.
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//
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// Inside the CallStack are a number of "chunks" which are arranged in a
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// linked list. Each chunk contains an array of frames (each frame is
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// represented by a program counter address). If we run out of space when
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// pushing new frames onto an existing chunk in the CallStack chunk list,
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// then a new chunk is allocated and appended to the end of the list. In this
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// way, the CallStack can grow dynamically as needed. New frames are always
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// pushed onto the chunk at the end of the list known as the "top" chunk.
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//
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class CallStack
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{
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public:
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CallStack ();
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CallStack (const CallStack &other);
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~CallStack ();
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// Public APIs - see each function definition for details.
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VOID clear ();
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VOID dump (BOOL showinternalframes) const;
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virtual VOID getstacktrace (UINT32 maxdepth, SIZE_T *framepointer) = 0;
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CallStack& operator = (const CallStack &other);
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BOOL operator == (const CallStack &other) const;
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SIZE_T operator [] (UINT32 index) const;
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VOID push_back (const SIZE_T programcounter);
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protected:
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// Protected data.
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UINT32 m_status; // Status flags:
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#define CALLSTACK_STATUS_INCOMPLETE 0x1 // If set, the stack trace stored in this CallStack appears to be incomplete.
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private:
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// The chunk list is made of a linked list of Chunks.
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typedef struct chunk_s {
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struct chunk_s *next; // Pointer to the next chunk in the chunk list.
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SIZE_T frames [CALLSTACKCHUNKSIZE]; // Pushed frames (program counter addresses) are stored in this array.
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} chunk_t;
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// Private data.
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UINT32 m_capacity; // Current capacity limit (in frames)
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UINT32 m_size; // Current size (in frames)
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CallStack::chunk_t m_store; // Pointer to the underlying data store (i.e. head of the chunk list)
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CallStack::chunk_t *m_topchunk; // Pointer to the chunk at the top of the stack
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UINT32 m_topindex; // Index, within the top chunk, of the top of the stack
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};
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////////////////////////////////////////////////////////////////////////////////
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//
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// The FastCallStack Class
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//
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// This class is a specialization of the CallStack class which provides a
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// very fast stack tracing function.
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//
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class FastCallStack : public CallStack
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{
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public:
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VOID getstacktrace (UINT32 maxdepth, SIZE_T *framepointer);
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};
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////////////////////////////////////////////////////////////////////////////////
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//
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// The SafeCallStack Class
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//
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// This class is a specialization of the CallStack class which provides a
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// more robust, but quite slow, stack tracing function.
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//
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class SafeCallStack : public CallStack
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{
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public:
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VOID getstacktrace (UINT32 maxdepth, SIZE_T *framepointer);
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};
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