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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#ifndef __STACKCONTENTS_H__
#define __STACKCONTENTS_H__
#ifdef FEATURE_PERFTRACING
#include "common.h"
class MethodDesc;
class StackContents
{
private:
const static unsigned int MAX_STACK_DEPTH = 100;
// Array of IP values from a stack crawl.
// Top of stack is at index 0.
UINT_PTR m_stackFrames[MAX_STACK_DEPTH];
#ifdef _DEBUG
// Parallel array of MethodDesc pointers.
// Used for debug-only stack printing.
MethodDesc *m_methods[MAX_STACK_DEPTH];
#endif // _DEBUG
// The next available slot in StackFrames.
unsigned int m_nextAvailableFrame;
public:
StackContents()
{
LIMITED_METHOD_CONTRACT;
Reset();
}
void CopyTo(StackContents *pDest)
{
LIMITED_METHOD_CONTRACT;
_ASSERTE(pDest != NULL);
memcpy_s(pDest->m_stackFrames, MAX_STACK_DEPTH * sizeof(UINT_PTR), m_stackFrames, sizeof(UINT_PTR) * m_nextAvailableFrame);
#ifdef _DEBUG
memcpy_s(pDest->m_methods, MAX_STACK_DEPTH * sizeof(MethodDesc *), m_methods, sizeof(MethodDesc *) * m_nextAvailableFrame);
#endif
pDest->m_nextAvailableFrame = m_nextAvailableFrame;
}
void Reset()
{
LIMITED_METHOD_CONTRACT;
m_nextAvailableFrame = 0;
}
bool IsEmpty()
{
LIMITED_METHOD_CONTRACT;
return (m_nextAvailableFrame == 0);
}
unsigned int GetLength()
{
LIMITED_METHOD_CONTRACT;
return m_nextAvailableFrame;
}
UINT_PTR GetIP(unsigned int frameIndex)
{
LIMITED_METHOD_CONTRACT;
_ASSERTE(frameIndex < MAX_STACK_DEPTH);
if (frameIndex >= MAX_STACK_DEPTH)
{
return 0;
}
return m_stackFrames[frameIndex];
}
#ifdef _DEBUG
MethodDesc *GetMethod(unsigned int frameIndex)
{
LIMITED_METHOD_CONTRACT;
_ASSERTE(frameIndex < MAX_STACK_DEPTH);
if (frameIndex >= MAX_STACK_DEPTH)
{
return NULL;
}
return m_methods[frameIndex];
}
#endif // _DEBUG
void Append(UINT_PTR controlPC, MethodDesc *pMethod)
{
LIMITED_METHOD_CONTRACT;
if (m_nextAvailableFrame < MAX_STACK_DEPTH)
{
m_stackFrames[m_nextAvailableFrame] = controlPC;
#ifdef _DEBUG
m_methods[m_nextAvailableFrame] = pMethod;
#endif
m_nextAvailableFrame++;
}
}
BYTE *GetPointer() const
{
LIMITED_METHOD_CONTRACT;
return (BYTE *)m_stackFrames;
}
unsigned int GetSize() const
{
LIMITED_METHOD_CONTRACT;
return (m_nextAvailableFrame * sizeof(UINT_PTR));
}
};
#endif // FEATURE_PERFTRACING
#endif // __STACKCONTENTS_H__
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