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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.
//
// ZapInfo.h
//
//
// JIT-EE interface for zapping
//
// ======================================================================================
#ifndef __ZAPINFO_H__
#define __ZAPINFO_H__
#include "zapcode.h"
class ZapInfo;
struct InlineContext;
// The compiled code often implicitly needs fixups for various subtle reasons.
// We only emit explict fixups while compiling the method, while collecting
// implicit fixups in the LoadTable. At the end of compiling, we expect
// many of the LoadTable entries to be subsumed by the explicit entries
// and will not need to be emitted.
// This is also used to detect duplicate explicit fixups for the same type.
template <typename HandleType>
class LoadTable
{
private:
ZapImage *m_pModule;
struct LoadEntry
{
HandleType handle;
int order; // -1 = fixed
};
static int __cdecl LoadEntryCmp(const void* a_, const void* b_)
{
return ((LoadEntry*)a_)->order - ((LoadEntry*)b_)->order;
}
class LoadEntryTraits : public NoRemoveSHashTraits< DefaultSHashTraits<LoadEntry> >
{
public:
typedef typename NoRemoveSHashTraits<DefaultSHashTraits<LoadEntry> >::count_t count_t;
typedef typename NoRemoveSHashTraits<DefaultSHashTraits<LoadEntry> >::element_t element_t;
typedef HandleType key_t;
static key_t GetKey(element_t e)
{
LIMITED_METHOD_CONTRACT;
return e.handle;
}
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)(size_t)k;
}
static const element_t Null() { LIMITED_METHOD_CONTRACT; LoadEntry e; e.handle = NULL; e.order = 0; return e; }
static bool IsNull(const element_t &e) { LIMITED_METHOD_CONTRACT; return (e.handle == NULL); }
};
typedef SHash<LoadEntryTraits> LoadEntryHashTable;
LoadEntryHashTable m_entries;
public:
LoadTable(ZapImage *pModule)
: m_pModule(pModule)
{
}
// fixed=TRUE if the caller can guarantee that type will be fixed up because
// of some implicit fixup. In this case, we track 'handle' only to avoid
// duplicates and will not actually emit an explicit fixup for 'handle'
//
// fixed=FALSE if the caller needs an explicit fixup. We will emit an
// explicit fixup for 'handle' if there are no other implicit fixups.
void Load(HandleType handle, BOOL fixed)
{
CONTRACTL
{
THROWS;
GC_NOTRIGGER;
}
CONTRACTL_END;
const LoadEntry *result = m_entries.LookupPtr(handle);
if (result != NULL)
{
if (fixed)
((LoadEntry*)result)->order = -1;
return;
}
LoadEntry newEntry;
newEntry.handle = handle;
newEntry.order = fixed ? -1 : m_entries.GetCount();
m_entries.Add(newEntry);
}
void EmitLoadFixups(CORINFO_METHOD_HANDLE currentMethodHandle, ZapInfo * pZapInfo);
};
// Declare some specializations of EmitLoadFixups().
template<> void LoadTable<CORINFO_CLASS_HANDLE>::EmitLoadFixups(CORINFO_METHOD_HANDLE currentMethodHandle, ZapInfo * pZapInfo);
template<> void LoadTable<CORINFO_METHOD_HANDLE>::EmitLoadFixups(CORINFO_METHOD_HANDLE currentMethodHandle, ZapInfo * pZapInfo);
class ZapInfo
: public ICorJitInfo
{
friend class ZapImage;
// Owning ZapImage
ZapImage * m_pImage;
Zapper * m_zapper;
ICorDynamicInfo * m_pEEJitInfo;
ICorCompileInfo * m_pEECompileInfo;
// Current method being compiled; it is non-nil only for
// method defs whose IL is in this module and (for generic code)
// have <object> instantiation. It is also nil for IL_STUBs.
mdMethodDef m_currentMethodToken;
CORINFO_METHOD_HANDLE m_currentMethodHandle;
CORINFO_METHOD_INFO m_currentMethodInfo;
// m_currentMethodModule==m_hModule except for generic types/methods
// defined in another assembly but instantiated in the current assembly.
CORINFO_MODULE_HANDLE m_currentMethodModule;
unsigned m_currentMethodProfilingDataFlags;
// Debug information reported by the JIT compiler for the current method
ICorDebugInfo::NativeVarInfo *m_pNativeVarInfo;
ULONG32 m_iNativeVarInfo;
ICorDebugInfo::OffsetMapping *m_pOffsetMapping;
ULONG32 m_iOffsetMapping;
BYTE * m_pGCInfo;
SIZE_T m_cbGCInfo;
ZapBlobWithRelocs * m_pCode;
ZapBlobWithRelocs * m_pColdCode;
ZapBlobWithRelocs * m_pROData;
#ifdef FEATURE_EH_FUNCLETS
// Unwind info of the main method body. It will get merged with GC info.
BYTE * m_pMainUnwindInfo;
ULONG m_cbMainUnwindInfo;
ZapUnwindInfo * m_pUnwindInfo;
ZapUnwindInfo * m_pUnwindInfoFragments;
#if defined(TARGET_AMD64)
ZapUnwindInfo * m_pChainedColdUnwindInfo;
#endif
#endif // FEATURE_EH_FUNCLETS
ZapExceptionInfo * m_pExceptionInfo;
ZapBlobWithRelocs * m_pProfileData;
ZapImport * m_pProfilingHandle;
struct CodeRelocation : ZapReloc
{
ZapBlobWithRelocs * m_pNode;
};
SArray<CodeRelocation> m_CodeRelocations;
static int __cdecl CompareCodeRelocation(const void * a, const void * b);
struct ImportEntry
{
ZapImport * pImport;
bool fConditional; // Conditional imports are emitted only if they are actually referenced by the code.
};
class ImportTraits : public NoRemoveSHashTraits< DefaultSHashTraits<ImportEntry> >
{
public:
typedef ZapImport * key_t;
static key_t GetKey(element_t e)
{
LIMITED_METHOD_CONTRACT;
return e.pImport;
}
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)(size_t)k;
}
static const element_t Null() { LIMITED_METHOD_CONTRACT; ImportEntry e; e.pImport = NULL; return e; }
static bool IsNull(const element_t &e) { LIMITED_METHOD_CONTRACT; return e.pImport == NULL; }
};
SHash<ImportTraits> m_ImportSet;
SArray<ZapImport *> m_Imports;
InlineSString<128> m_currentMethodName;
// Cache to reduce the number of entries in CORCOMPILE_LOAD_TABLE if it
// is implied by some other fixup type
LoadTable<CORINFO_CLASS_HANDLE> m_ClassLoadTable;
LoadTable<CORINFO_METHOD_HANDLE> m_MethodLoadTable;
CORJIT_FLAGS m_jitFlags;
void InitMethodName();
CORJIT_FLAGS ComputeJitFlags(CORINFO_METHOD_HANDLE handle);
ZapDebugInfo * EmitDebugInfo();
ZapGCInfo * EmitGCInfo();
ZapImport ** EmitFixupList();
void PublishCompiledMethod();
void EmitCodeRelocations();
void ProcessReferences();
BOOL CurrentMethodHasProfileData();
void embedGenericSignature(CORINFO_LOOKUP * pLookup);
PVOID embedDirectCall(CORINFO_METHOD_HANDLE ftn,
CORINFO_ACCESS_FLAGS accessFlags,
BOOL fAllowThunk);
struct ProfileDataResults
{
ProfileDataResults(CORINFO_METHOD_HANDLE ftn) : m_ftn(ftn) {}
ProfileDataResults* m_next = nullptr;
CORINFO_METHOD_HANDLE m_ftn;
SArray<PgoInstrumentationSchema> m_schema;
BYTE *pInstrumentationData = nullptr;
HRESULT m_hr = E_FAIL;
};
ProfileDataResults *m_pgoResults = nullptr;
public:
ZapInfo(ZapImage * pImage, mdMethodDef md, CORINFO_METHOD_HANDLE handle, CORINFO_MODULE_HANDLE module, unsigned methodProfilingDataFlags);
~ZapInfo();
#ifdef ALLOW_SXS_JIT_NGEN
void ResetForJitRetry();
#endif // ALLOW_SXS_JIT_NGEN
void CompileMethod();
void AppendImport(ZapImport * pImport);
void AppendConditionalImport(ZapImport * pImport);
ULONG GetNumFixups();
// ICorJitInfo
#include "icorjitinfoimpl_generated.h"
int canHandleException(struct _EXCEPTION_POINTERS *pExceptionPointers);
void * getAddressOfPInvokeFixup(CORINFO_METHOD_HANDLE method,
void **ppIndirection);
ZapImport * GetProfilingHandleImport();
};
#endif // __ZAPINFO_H__
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