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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.
//
// ZapMetadata.h
//
//
// Metadata zapping
//
// ======================================================================================
#ifndef __ZAPMETADATA_H__
#define __ZAPMETADATA_H__
//-----------------------------------------------------------------------------
//
// ZapMetaData is the barebone ZapNode to save metadata scope
//
class ZapMetaData : public ZapNode
{
DWORD m_dwSize;
protected:
IMetaDataEmit * m_pEmit;
public:
ZapMetaData()
{
}
~ZapMetaData()
{
SAFERELEASE(m_pEmit);
}
void SetMetaData(IUnknown * pEmit);
virtual DWORD GetSize();
virtual UINT GetAlignment()
{
return sizeof(DWORD);
}
virtual ZapNodeType GetType()
{
return ZapNodeType_MetaData;
}
virtual void Save(ZapWriter * pZapWriter);
};
//-----------------------------------------------------------------------------
//
// Helper node to copy RVA data to from IL to the NGEN image.
//
class ZapRVADataNode : public ZapNode
{
PVOID m_pData;
DWORD m_dwSize;
DWORD m_dwAlignment;
public:
ZapRVADataNode(PVOID pData)
{
m_pData = pData;
m_dwSize = 0;
m_dwAlignment = 1;
}
void UpdateSizeAndAlignment(DWORD dwSize, DWORD dwAlignment)
{
if (dwSize > m_dwSize)
m_dwSize = dwSize;
if (dwAlignment > m_dwAlignment)
m_dwAlignment = dwAlignment;
}
PVOID GetData()
{
return m_pData;
}
virtual DWORD GetSize()
{
return m_dwSize;
}
virtual UINT GetAlignment()
{
return m_dwAlignment;
}
virtual ZapNodeType GetType()
{
return ZapNodeType_RVAFieldData;
}
virtual void Save(ZapWriter * pZapWriter)
{
pZapWriter->Write(m_pData, m_dwSize);
}
};
//-----------------------------------------------------------------------------
//
// ZapILMetaData copies both the metadata and IL to the NGEN image.
//
class ZapILMetaData : public ZapMetaData
{
ZapImage * m_pImage;
class ILBlob : public ZapBlobPtr
{
public:
ILBlob(PVOID pData, SIZE_T cbSize)
: ZapBlobPtr(pData, cbSize)
{
}
virtual UINT GetAlignment()
{
// The tiny header does not have any alignment requirements
return ((COR_ILMETHOD_TINY *)GetData())->IsTiny() ? sizeof(BYTE) : sizeof(DWORD);
}
};
// Hashtable with all IL method blobs. If two methods have same IL code
// we store it just once.
SHash< NoRemoveSHashTraits < ZapBlob::SHashTraits > > m_blobs;
struct ILMethod
{
mdMethodDef m_md;
ZapBlob * m_pIL;
};
class ILMethodTraits : public NoRemoveSHashTraits< DefaultSHashTraits<ILMethod> >
{
public:
typedef const mdMethodDef key_t;
static key_t GetKey(element_t e)
{
LIMITED_METHOD_CONTRACT;
return e.m_md;
}
static BOOL Equals(key_t k1, key_t k2)
{
LIMITED_METHOD_CONTRACT;
return k1 == k2;
}
static count_t Hash(key_t k)
{
LIMITED_METHOD_CONTRACT;
return k;
}
static const element_t Null() { LIMITED_METHOD_CONTRACT; ILMethod e; e.m_md = 0; e.m_pIL = NULL; return e; }
static bool IsNull(const element_t &e) { LIMITED_METHOD_CONTRACT; return e.m_md == 0; }
};
SHash< ILMethodTraits > m_ILMethods;
public:
ZapILMetaData(ZapImage * pImage)
: m_pImage(pImage)
{
}
void Preallocate(COUNT_T cbILImage)
{
PREALLOCATE_HASHTABLE(ZapILMetaData::m_blobs, 0.0040, cbILImage);
PREALLOCATE_HASHTABLE(ZapILMetaData::m_ILMethods, 0.0044, cbILImage);
}
void EmitMethodIL(mdMethodDef md);
void CopyIL();
void CopyMetaData();
void CopyRVAFields();
virtual void Save(ZapWriter * pZapWriter);
ZapRVADataNode * GetRVAField(void * pData);
private:
class RVADataTraits : public NoRemoveSHashTraits< DefaultSHashTraits<ZapRVADataNode *> >
{
public:
typedef PVOID key_t;
static key_t GetKey(element_t e)
{
LIMITED_METHOD_CONTRACT;
return e->GetData();
}
static BOOL Equals(key_t k1, key_t k2)
{
LIMITED_METHOD_CONTRACT;
return k1 == k2;
}
static count_t Hash(key_t k)
{
LIMITED_METHOD_CONTRACT;
return (count_t)k;
}
static const element_t Null() { LIMITED_METHOD_CONTRACT; return NULL; }
static bool IsNull(const element_t &e) { LIMITED_METHOD_CONTRACT; return e == NULL; }
};
SHash< RVADataTraits > m_rvaData;
};
#endif // __ZAPMETADATA_H__
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