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//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
//
//
// File: ILStubCache.h
//
//
#ifdef _MSC_VER
#pragma once
#endif // _MSC_VER
#ifndef _ILSTUBCACHE_H
#define _ILSTUBCACHE_H
#include "vars.hpp"
#include "util.hpp"
#include "crst.h"
#include "ngenhash.h"
#ifndef CLR_STANDALONE_BINDER
#include "stubgen.h"
#endif
class ILStubHashBlobBase
{
public:
size_t m_cbSizeOfBlob; // this is size of entire object!!
};
class ILStubHashBlob : public ILStubHashBlobBase
{
public:
BYTE m_rgbBlobData[1];
};
//
// This class caches MethodDesc's for dynamically generated IL stubs, it is not
// persisted in NGEN images.
//
class ILStubCache : private CClosedHashBase
{
private:
//---------------------------------------------------------
// Hash entry for CClosedHashBase.
//---------------------------------------------------------
struct ILCHASHENTRY
{
// Values:
// NULL = free
// -1 = deleted
// other = used
MethodDesc* m_pMethodDesc;
ILStubHashBlob* m_pBlob;
};
public:
//---------------------------------------------------------
// Constructor
//---------------------------------------------------------
ILStubCache(LoaderHeap* heap = NULL);
//---------------------------------------------------------
// Destructor
//---------------------------------------------------------
virtual ~ILStubCache();
void Init(LoaderHeap* pHeap);
MethodDesc* GetStubMethodDesc(
MethodDesc *pTargetMD,
ILStubHashBlob* pParams,
DWORD dwStubFlags, // bitmask of NDirectStubFlags
Module* pSigModule,
PCCOR_SIGNATURE pSig,
DWORD cbSig,
AllocMemTracker* pamTracker,
bool& bILStubCreator,
MethodDesc* pLastMD);
void DeleteEntry(void *pParams);
void AddMethodDescChunkWithLockTaken(MethodDesc *pMD);
#ifndef CLR_STANDALONE_BINDER
static MethodDesc* CreateAndLinkNewILStubMethodDesc(
LoaderAllocator* pAllocator,
MethodTable* pMT,
DWORD dwStubFlags, // bitmask of NDirectStubFlags
Module* pSigModule,
PCCOR_SIGNATURE pSig,
DWORD cbSig,
SigTypeContext *pTypeContext,
ILStubLinker* pStubLinker);
#endif
MethodTable * GetStubMethodTable()
{
LIMITED_METHOD_CONTRACT;
return m_pStubMT;
}
MethodTable* GetOrCreateStubMethodTable(Module* pLoaderModule);
private:
static MethodDesc* CreateNewMethodDesc(
LoaderHeap* pCreationHeap,
MethodTable* pMT,
DWORD dwStubFlags, // bitmask of NDirectStubFlags
Module* pSigModule,
PCCOR_SIGNATURE pSig,
DWORD cbSig,
SigTypeContext *pTypeContext,
AllocMemTracker* pamTracker);
// *** OVERRIDES FOR CClosedHashBase ***/
//*****************************************************************************
// Hash is called with a pointer to an element in the table. You must override
// this method and provide a hash algorithm for your element type.
//*****************************************************************************
virtual unsigned int Hash( // The key value.
void const* pData); // Raw data to hash.
//*****************************************************************************
// Compare is used in the typical memcmp way, 0 is eqaulity, -1/1 indicate
// direction of miscompare. In this system everything is always equal or not.
//*****************************************************************************
virtual unsigned int Compare( // 0, -1, or 1.
void const* pData, // Raw key data on lookup.
BYTE* pElement); // The element to compare data against.
//*****************************************************************************
// Return true if the element is free to be used.
//*****************************************************************************
virtual ELEMENTSTATUS Status( // The status of the entry.
BYTE* pElement); // The element to check.
//*****************************************************************************
// Sets the status of the given element.
//*****************************************************************************
virtual void SetStatus(
BYTE* pElement, // The element to set status for.
ELEMENTSTATUS eStatus); // New status.
//*****************************************************************************
// Returns the internal key value for an element.
//*****************************************************************************
virtual void* GetKey( // The data to hash on.
BYTE* pElement); // The element to return data ptr for.
private:
Crst m_crst;
LoaderHeap* m_heap;
MethodTable* m_pStubMT;
};
#ifdef FEATURE_PREJIT
//========================================================================================
//
// This hash table is used by interop to lookup NGENed marshaling stubs for methods
// in cases where the MethodDesc cannot point to the stub directly.
//
// Keys are arbitrary MethodDesc's, values are IL stub MethodDescs.
//
//========================================================================================
typedef DPTR(struct StubMethodHashEntry) PTR_StubMethodHashEntry;
typedef struct StubMethodHashEntry
{
PTR_MethodDesc GetMethod();
PTR_MethodDesc GetStubMethod();
#ifndef DACCESS_COMPILE
void SetMethodAndStub(MethodDesc *pMD, MethodDesc *pStubMD);
#endif // !DACCESS_COMPILE
private:
friend class StubMethodHashTable;
#ifdef DACCESS_COMPILE
friend class NativeImageDumper;
#endif
PTR_MethodDesc pMD;
PTR_MethodDesc pStubMD;
#ifdef BINDER
friend class MdilModule;
#endif
} StubMethodHashEntry_t;
// The hash table itself
typedef DPTR(class StubMethodHashTable) PTR_StubMethodHashTable;
class StubMethodHashTable : public NgenHashTable<StubMethodHashTable, StubMethodHashEntry, 2>
{
#ifndef DACCESS_COMPILE
StubMethodHashTable();
StubMethodHashTable(Module *pModule, LoaderHeap *pHeap, DWORD cInitialBuckets) :
NgenHashTable<StubMethodHashTable, StubMethodHashEntry, 2>(pModule, pHeap, cInitialBuckets) {}
~StubMethodHashTable();
#endif
public:
static StubMethodHashTable *Create(LoaderAllocator *pAllocator, Module *pModule, DWORD dwNumBuckets, AllocMemTracker *pamTracker);
private:
void operator delete(void *p);
public:
// Looks up a stub MethodDesc in the hash table, returns NULL if not found
MethodDesc *FindMethodDesc(MethodDesc *pMD);
#ifndef DACCESS_COMPILE
// Inserts a method-stub pair into the hash table
VOID InsertMethodDesc(MethodDesc *pMD, MethodDesc *pStubMD);
void Save(DataImage *image, CorProfileData *profileData);
void Fixup(DataImage *image);
bool ShouldSave(DataImage *pImage, StubMethodHashEntry_t *pEntry);
bool IsHotEntry(StubMethodHashEntry_t *pEntry, CorProfileData *pProfileData)
{ LIMITED_METHOD_CONTRACT; return true; }
bool SaveEntry(DataImage *pImage, CorProfileData *pProfileData, StubMethodHashEntry_t *pOldEntry, StubMethodHashEntry_t *pNewEntry, EntryMappingTable *pMap)
{ LIMITED_METHOD_CONTRACT; return false; }
void FixupEntry(DataImage *pImage, StubMethodHashEntry_t *pEntry, void *pFixupBase, DWORD cbFixupOffset);
#endif // !DACCESS_COMPILE
#ifdef DACCESS_COMPILE
void EnumMemoryRegions(CLRDataEnumMemoryFlags flags);
void EnumMemoryRegionsForEntry(StubMethodHashEntry_t *pEntry, CLRDataEnumMemoryFlags flags);
#endif
};
#endif // FEATURE_PREJIT
#endif //_ILSTUBCACHE_H
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