// 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.

//*****************************************************************************

//

// File: DebuggerModule.cpp

//

// Stuff for tracking DebuggerModules.

//

//*****************************************************************************

#include "stdafx.h"

#include "../inc/common.h"

#include "perflog.h"

#include "eeconfig.h" // This is here even for retail & free builds...

#include "vars.hpp"

#include <limits.h>

#include "ilformatter.h"

#include "debuginfostore.h"

#include "../../vm/methoditer.h"

#ifndef DACCESS_COMPILE

bool DbgIsSpecialILOffset(DWORD offset)

{

LIMITED_METHOD_CONTRACT;

return (offset == (ULONG) ICorDebugInfo::PROLOG ||

offset == (ULONG) ICorDebugInfo::EPILOG ||

offset == (ULONG) ICorDebugInfo::NO_MAPPING);

}

// Helper to use w/ the debug stores.

BYTE* InteropSafeNew(void * , size_t cBytes)

{

BYTE * p = new (interopsafe, nothrow) BYTE[cBytes];

return p;

}

//

// This is only fur internal debugging.

//

#ifdef LOGGING

static void _dumpVarNativeInfo(ICorDebugInfo::NativeVarInfo* vni)

{

WRAPPER_NO_CONTRACT;

LOG((LF_CORDB, LL_INFO1000000, "Var %02d: 0x%04x-0x%04x vlt=",

vni->varNumber,

vni->startOffset, vni->endOffset,

vni->loc.vlType));

switch (vni->loc.vlType)

{

case ICorDebugInfo::VLT_REG:

LOG((LF_CORDB, LL_INFO1000000, "REG reg=%d\n", vni->loc.vlReg.vlrReg));

break;

case ICorDebugInfo::VLT_REG_BYREF:

LOG((LF_CORDB, LL_INFO1000000, "REG_BYREF reg=%d\n", vni->loc.vlReg.vlrReg));

break;

case ICorDebugInfo::VLT_STK:

LOG((LF_CORDB, LL_INFO1000000, "STK reg=%d off=0x%04x (%d)\n",

vni->loc.vlStk.vlsBaseReg,

vni->loc.vlStk.vlsOffset,

vni->loc.vlStk.vlsOffset));

break;

case ICorDebugInfo::VLT_STK_BYREF:

LOG((LF_CORDB, LL_INFO1000000, "STK_BYREF reg=%d off=0x%04x (%d)\n",

vni->loc.vlStk.vlsBaseReg,

vni->loc.vlStk.vlsOffset,

vni->loc.vlStk.vlsOffset));

break;

case ICorDebugInfo::VLT_REG_REG:

LOG((LF_CORDB, LL_INFO1000000, "REG_REG reg1=%d reg2=%d\n",

vni->loc.vlRegReg.vlrrReg1,

vni->loc.vlRegReg.vlrrReg2));

break;

case ICorDebugInfo::VLT_REG_STK:

LOG((LF_CORDB, LL_INFO1000000, "REG_STK reg=%d basereg=%d off=0x%04x (%d)\n",

vni->loc.vlRegStk.vlrsReg,

vni->loc.vlRegStk.vlrsStk.vlrssBaseReg,

vni->loc.vlRegStk.vlrsStk.vlrssOffset,

vni->loc.vlRegStk.vlrsStk.vlrssOffset));

break;

case ICorDebugInfo::VLT_STK_REG:

LOG((LF_CORDB, LL_INFO1000000, "STK_REG basereg=%d off=0x%04x (%d) reg=%d\n",

vni->loc.vlStkReg.vlsrStk.vlsrsBaseReg,

vni->loc.vlStkReg.vlsrStk.vlsrsOffset,

vni->loc.vlStkReg.vlsrStk.vlsrsOffset,

vni->loc.vlStkReg.vlsrReg));

break;

case ICorDebugInfo::VLT_STK2:

LOG((LF_CORDB, LL_INFO1000000, "STK_STK reg=%d off=0x%04x (%d)\n",

vni->loc.vlStk2.vls2BaseReg,

vni->loc.vlStk2.vls2Offset,

vni->loc.vlStk2.vls2Offset));

break;

case ICorDebugInfo::VLT_FPSTK:

LOG((LF_CORDB, LL_INFO1000000, "FPSTK reg=%d\n",

vni->loc.vlFPstk.vlfReg));

break;

case ICorDebugInfo::VLT_FIXED_VA:

LOG((LF_CORDB, LL_INFO1000000, "FIXED_VA offset=%d (%d)\n",

vni->loc.vlFixedVarArg.vlfvOffset,

vni->loc.vlFixedVarArg.vlfvOffset));

break;

default:

LOG((LF_CORDB, LL_INFO1000000, "???\n"));

break;

}

}

#endif

#if defined(FEATURE_EH_FUNCLETS)

void DebuggerJitInfo::InitFuncletAddress()

{

CONTRACTL

{

NOTHROW;

GC_NOTRIGGER;

}

CONTRACTL_END;

m_funcletCount = (int)g_pEEInterface->GetFuncletStartOffsets((const BYTE*)m_addrOfCode, NULL, 0);

if (m_funcletCount == 0)

{

_ASSERTE(m_rgFunclet == NULL);

return;

}

m_rgFunclet = (DWORD*)(new (interopsafe, nothrow) DWORD[m_funcletCount]);

// All bets are off for stepping this method.

if (m_rgFunclet == NULL)

{

m_funcletCount = 0;

return;

}

// This will get the offsets relative to the parent method start as if

// the funclet was in contiguous memory (i.e. not hot/cold split).

g_pEEInterface->GetFuncletStartOffsets((const BYTE*)m_addrOfCode, m_rgFunclet, m_funcletCount);

}

//

// DebuggerJitInfo::GetFuncletOffsetByIndex()

//

// Given a funclet index, return its starting offset.

//

// parameters: index - index of the funclet

//

// return value: starting offset of the specified funclet, or -1 if the index is invalid

//

DWORD DebuggerJitInfo::GetFuncletOffsetByIndex(int index)

{

LIMITED_METHOD_CONTRACT;

if (index < 0 || index >= m_funcletCount)

{

return (-1);

}

return m_rgFunclet[index];

}

//

// DebuggerJitInfo::GetFuncletIndex()

//

// Given an offset or an absolute address, return the index of the funclet containing it.

//

// parameters: offsetOrAddr - an offset or an absolute address in the method

// mode - whether the first argument is an offset or an absolute address

//

// return value: the index of the funclet containing the specified offset or address,

// or -1 if it's invalid

//

int DebuggerJitInfo::GetFuncletIndex(CORDB_ADDRESS offsetOrAddr, GetFuncletIndexMode mode)

{

WRAPPER_NO_CONTRACT;

DWORD offset = 0;

if (mode == GFIM_BYOFFSET)

{

offset = (DWORD)offsetOrAddr;

}

// If the address doesn't fall in any of the funclets (or if the

// method doesn't have any funclet at all), then return PARENT_METHOD_INDEX.

// <TODO>

// What if there's an overflow?

// </TODO>

if (!m_codeRegionInfo.IsMethodAddress((const BYTE *)(mode == GFIM_BYOFFSET ? (size_t)m_codeRegionInfo.OffsetToAddress(offset) : offsetOrAddr)))

{

return PARENT_METHOD_INDEX;

}

if ( ( m_funcletCount == 0 ) ||

( (mode == GFIM_BYOFFSET) && (offset < m_rgFunclet[0]) ) ||

( (mode == GFIM_BYADDRESS) && (offsetOrAddr < (size_t)m_codeRegionInfo.OffsetToAddress(m_rgFunclet[0])) ) )

{

return PARENT_METHOD_INDEX;

}

for (int i = 0; i < m_funcletCount; i++)

{

if (i == (m_funcletCount - 1))

{

return i;

}

else if ( ( (mode == GFIM_BYOFFSET) && (offset < m_rgFunclet[i+1]) ) ||

( (mode == GFIM_BYADDRESS) && (offsetOrAddr < (size_t)m_codeRegionInfo.OffsetToAddress(m_rgFunclet[i+1])) ) )

{

return i;

}

}

UNREACHABLE();

}

#endif // FEATURE_EH_FUNCLETS

// It is entirely possible that we have multiple sequence points for the

// same IL offset (because of funclets, optimization, etc.). Just to be

// uniform in all cases, let's return the sequence point with the smallest

// native offset if fWantFirst is TRUE.

#if defined(FEATURE_EH_FUNCLETS)

#define ADJUST_MAP_ENTRY(_map, _wantFirst) \

if ((_wantFirst)) \

for ( ; (_map) > m_sequenceMap && (((_map)-1)->ilOffset == (_map)->ilOffset); (_map)--); \

else \

for ( ; (_map) < m_sequenceMap + (m_sequenceMapCount-1) && (((_map)+1)->ilOffset == (_map)->ilOffset); (_map)++);

#else

#define ADJUST_MAP_ENTRY(_map, _wantFirst)

#endif // FEATURE_EH_FUNCLETS

DebuggerJitInfo::DebuggerJitInfo(DebuggerMethodInfo *minfo, NativeCodeVersion nativeCodeVersion) :

m_nativeCodeVersion(nativeCodeVersion),

m_pLoaderModule(nativeCodeVersion.GetMethodDesc()->GetLoaderModule()),

m_jitComplete(false),

#ifdef EnC_SUPPORTED

m_encBreakpointsApplied(false),

#endif //EnC_SUPPORTED

m_methodInfo(minfo),

m_addrOfCode(NULL),

m_sizeOfCode(0), m_prevJitInfo(NULL), m_nextJitInfo(NULL),

m_lastIL(0),

m_sequenceMap(NULL),

m_sequenceMapCount(0),

m_callsiteMap(NULL),

m_callsiteMapCount(0),

m_sequenceMapSorted(false),

m_varNativeInfo(NULL), m_varNativeInfoCount(0),

m_fAttemptInit(false)

#if defined(FEATURE_EH_FUNCLETS)

,m_rgFunclet(NULL)

, m_funcletCount(0)

#endif // defined(FEATURE_EH_FUNCLETS)

{

WRAPPER_NO_CONTRACT;

// A DJI is just the debugger's cache of interesting information +

// various debugger-specific state for a method (like Enc).

// So only be createing DJIs when a debugger is actually attached.

// The profiler also piggy-backs on the DJIs.

// @Todo - the managed stackwalker in the BCL also builds on DJIs.

//_ASSERTE(CORDebuggerAttached() || CORProfilerPresent());

_ASSERTE(minfo);

m_encVersion = minfo->GetCurrentEnCVersion();

_ASSERTE(m_encVersion >= CorDB_DEFAULT_ENC_FUNCTION_VERSION);

LOG((LF_CORDB,LL_EVERYTHING, "DJI::DJI : created at 0x%x\n", this));

// Debugger doesn't track LightWeight codegen methods.

// We should never even be creating a DJI for one.

_ASSERTE(!m_nativeCodeVersion.GetMethodDesc()->IsDynamicMethod());

}

DebuggerILToNativeMap *DebuggerJitInfo::MapILOffsetToMapEntry(SIZE_T offset, BOOL *exact, BOOL fWantFirst)

{

CONTRACTL

{

NOTHROW;

GC_NOTRIGGER;

MODE_ANY;

CAN_TAKE_LOCK; // GetSequenceMapCount calls LazyInitBounds() which can eventually

// call ExecutionManager::IncrementReader

}

CONTRACTL_END;

// Ideally we should be able to assert this, since the binary search in this function

// assumes that the sequence points are sorted by IL offset (NO_MAPPING, PROLOG, and EPILOG

// are actually -1, -2, and -3, respectively). However, the sequence points in pdb's use

// -1 to mean "end of the method", which is different from our semantics of using 0.

// _ASSERTE(offset != NO_MAPPING && offset != PROLOG && offset != EPILOG);

//

// Binary search for matching map element.

//

DebuggerILToNativeMap *mMin = GetSequenceMap();

DebuggerILToNativeMap *mMax = mMin + GetSequenceMapCount();

_ASSERTE(m_sequenceMapSorted);

_ASSERTE( mMin < mMax ); //otherwise we have no code

if (exact)

{

*exact = FALSE;

}

if (mMin)

{

while (mMin + 1 < mMax)

{

_ASSERTE(mMin>=m_sequenceMap);

DebuggerILToNativeMap *mMid = mMin + ((mMax - mMin)>>1);

_ASSERTE(mMid>=m_sequenceMap);

if (offset == mMid->ilOffset)

{

if (exact)

{

*exact = TRUE;

}

ADJUST_MAP_ENTRY(mMid, fWantFirst);

return mMid;

}

else if (offset < mMid->ilOffset && mMid->ilOffset != (ULONG) ICorDebugInfo::PROLOG)

{

mMax = mMid;

}

else

{

mMin = mMid;

}

}

if (exact && offset == mMin->ilOffset)

{

*exact = TRUE;

}

ADJUST_MAP_ENTRY(mMin, fWantFirst);

}

return mMin;

}

void DebuggerJitInfo::InitILToNativeOffsetIterator(ILToNativeOffsetIterator &iterator, SIZE_T ilOffset)

{

WRAPPER_NO_CONTRACT;

iterator.Init(this, ilOffset);

}

DebuggerJitInfo::NativeOffset DebuggerJitInfo::MapILOffsetToNative(DebuggerJitInfo::ILOffset ilOffset)

{

CONTRACTL

{

NOTHROW;

GC_NOTRIGGER;

}

CONTRACTL_END;

NativeOffset resultOffset;

DebuggerILToNativeMap *map = MapILOffsetToMapEntry(ilOffset.m_ilOffset, &(resultOffset.m_fExact));

#if defined(FEATURE_EH_FUNCLETS)

// See if we want the map entry for the parent.

if (ilOffset.m_funcletIndex <= PARENT_METHOD_INDEX)

{

#endif // FEATURE_EH_FUNCLETS

PREFIX_ASSUME( map != NULL );

LOG((LF_CORDB, LL_INFO10000, "DJI::MILOTN: ilOff 0x%x to nat 0x%x exact:0x%x (Entry IL Off:0x%x)\n",

ilOffset.m_ilOffset, map->nativeStartOffset, resultOffset.m_fExact, map->ilOffset));

resultOffset.m_nativeOffset = map->nativeStartOffset;

#if defined(FEATURE_EH_FUNCLETS)

}

else

{

// funcletIndex is guaranteed to be >= 0 at this point.

if (ilOffset.m_funcletIndex > (m_funcletCount - 1))

{

resultOffset.m_fExact = FALSE;

resultOffset.m_nativeOffset = ((SIZE_T)-1);

}

else

{

// Initialize the funclet range.

// ASSUMES that funclets are contiguous which they currently are...

DWORD funcletStartOffset = GetFuncletOffsetByIndex(ilOffset.m_funcletIndex);

DWORD funcletEndOffset;

if (ilOffset.m_funcletIndex < (m_funcletCount - 1))

{

funcletEndOffset = GetFuncletOffsetByIndex(ilOffset.m_funcletIndex + 1);

}

else

{

funcletEndOffset = (DWORD)m_sizeOfCode;

}

SIZE_T ilTargetOffset = map->ilOffset;

DebuggerILToNativeMap *mapEnd = GetSequenceMap() + GetSequenceMapCount();

for (; map < mapEnd && map->ilOffset == ilTargetOffset; map++)

{

if ((map->nativeStartOffset >= funcletStartOffset) &&

(map->nativeStartOffset < funcletEndOffset))

{

// This is the normal case where the start offset falls in

// the range of the funclet.

resultOffset.m_nativeOffset = map->nativeStartOffset;

break;

}

}

if (map == mapEnd || map->ilOffset != ilTargetOffset)

{

resultOffset.m_fExact = FALSE;

resultOffset.m_nativeOffset = ((SIZE_T)-1);

}

}

}

#endif // FEATURE_EH_FUNCLETS

return resultOffset;

}

DebuggerJitInfo::ILToNativeOffsetIterator::ILToNativeOffsetIterator()

{

LIMITED_METHOD_CONTRACT;

m_dji = NULL;

m_currentILOffset.m_ilOffset = INVALID_IL_OFFSET;

#ifdef FEATURE_EH_FUNCLETS

m_currentILOffset.m_funcletIndex = PARENT_METHOD_INDEX;

#endif

}

void DebuggerJitInfo::ILToNativeOffsetIterator::Init(DebuggerJitInfo* dji, SIZE_T ilOffset)

{

WRAPPER_NO_CONTRACT;

m_dji = dji;

m_currentILOffset.m_ilOffset = ilOffset;

#ifdef FEATURE_EH_FUNCLETS

m_currentILOffset.m_funcletIndex = PARENT_METHOD_INDEX;

#endif

m_currentNativeOffset = m_dji->MapILOffsetToNative(m_currentILOffset);

}

bool DebuggerJitInfo::ILToNativeOffsetIterator::IsAtEnd()

{

LIMITED_METHOD_CONTRACT;

return (m_currentILOffset.m_ilOffset == INVALID_IL_OFFSET);

}

SIZE_T DebuggerJitInfo::ILToNativeOffsetIterator::Current(BOOL* pfExact)

{

LIMITED_METHOD_CONTRACT;

if (pfExact != NULL)

{

*pfExact = m_currentNativeOffset.m_fExact;

}

return m_currentNativeOffset.m_nativeOffset;

}

SIZE_T DebuggerJitInfo::ILToNativeOffsetIterator::CurrentAssertOnlyOne(BOOL* pfExact)

{

WRAPPER_NO_CONTRACT;

SIZE_T nativeOffset = Current(pfExact);

Next();

_ASSERTE(IsAtEnd());

return nativeOffset;

}

void DebuggerJitInfo::ILToNativeOffsetIterator::Next()

{

#if defined(FEATURE_EH_FUNCLETS)

NativeOffset tmpNativeOffset;

for (m_currentILOffset.m_funcletIndex += 1;

m_currentILOffset.m_funcletIndex < m_dji->GetFuncletCount();

m_currentILOffset.m_funcletIndex++)

{

tmpNativeOffset = m_dji->MapILOffsetToNative(m_currentILOffset);

if (tmpNativeOffset.m_nativeOffset != ((SIZE_T)-1) &&

tmpNativeOffset.m_nativeOffset != m_currentNativeOffset.m_nativeOffset)

{

m_currentNativeOffset = tmpNativeOffset;

break;

}

}

if (m_currentILOffset.m_funcletIndex == m_dji->GetFuncletCount())

{

m_currentILOffset.m_ilOffset = INVALID_IL_OFFSET;

}

#else // !FEATURE_EH_FUNCLETS

m_currentILOffset.m_ilOffset = INVALID_IL_OFFSET;

#endif // !FEATURE_EH_FUNCLETS

}

// SIZE_T DebuggerJitInfo::MapSpecialToNative(): Maps something like

// a prolog to a native offset.

// CordDebugMappingResult mapping: Mapping type to be looking for.

// SIZE_T which: Which one. <TODO>For now, set to zero. <@todo Later, we'll

// change this to some value that we get back from MapNativeToILOffset

// to indicate which of the (possibly multiple epilogs) that may

// be present.</TODO>

SIZE_T DebuggerJitInfo::MapSpecialToNative(CorDebugMappingResult mapping,

SIZE_T which,

BOOL *pfAccurate)

{

CONTRACTL

{

NOTHROW;

GC_NOTRIGGER;

PRECONDITION(NULL != pfAccurate);

}

CONTRACTL_END;

LOG((LF_CORDB, LL_INFO10000, "DJI::MSTN map:0x%x which:0x%x\n", mapping, which));

bool fFound;

SIZE_T cFound = 0;

DebuggerILToNativeMap *m = GetSequenceMap();

DebuggerILToNativeMap *mEnd = m + GetSequenceMapCount();

if (m)

{

while(m < mEnd)

{

_ASSERTE(m>=GetSequenceMap());

fFound = false;

if (DbgIsSpecialILOffset(m->ilOffset))

cFound++;

if (cFound == which)

{

_ASSERTE( (mapping == MAPPING_PROLOG &&

m->ilOffset == (ULONG) ICorDebugInfo::PROLOG) ||

(mapping == MAPPING_EPILOG &&

m->ilOffset == (ULONG) ICorDebugInfo::EPILOG) ||

((mapping == MAPPING_NO_INFO || mapping == MAPPING_UNMAPPED_ADDRESS) &&

m->ilOffset == (ULONG) ICorDebugInfo::NO_MAPPING)

);

(*pfAccurate) = TRUE;

LOG((LF_CORDB, LL_INFO10000, "DJI::MSTN found mapping to nat:0x%x\n",

m->nativeStartOffset));

return m->nativeStartOffset;

}

m++;

}

}

LOG((LF_CORDB, LL_INFO10000, "DJI::MSTN No mapping found :(\n"));

(*pfAccurate) = FALSE;

return 0;

}

#if defined(FEATURE_EH_FUNCLETS)

//

// DebuggerJitInfo::MapILOffsetToNativeForSetIP()

//

// This function maps an IL offset to a native offset, taking into account cloned finallys and nested EH clauses.

//

// parameters: offsetILTo - the destination IP, in IL offset

// funcletIndexFrom - the funclet index of the source IP

// pEHRT - tree structure for keeping track of EH clause information

// pExact - pointer for returning whether the mapping is exact or not

//

// return value: destination IP, in native offset

//

SIZE_T DebuggerJitInfo::MapILOffsetToNativeForSetIP(SIZE_T offsetILTo, int funcletIndexFrom,

EHRangeTree* pEHRT, BOOL* pExact)

{

CONTRACTL

{

NOTHROW;

GC_NOTRIGGER;

MODE_ANY;

}

CONTRACTL_END;

DebuggerILToNativeMap* pMap = MapILOffsetToMapEntry(offsetILTo, pExact, TRUE);

DebuggerILToNativeMap* pMapEnd = GetSequenceMap() + GetSequenceMapCount();

_ASSERTE(pMap == m_sequenceMap ||

(pMap - 1)->ilOffset == (ULONG)ICorDebugInfo::NO_MAPPING ||

(pMap - 1)->ilOffset == (ULONG)ICorDebugInfo::PROLOG ||

(pMap - 1)->ilOffset == (ULONG)ICorDebugInfo::EPILOG ||

pMap->ilOffset > (pMap - 1)->ilOffset);

SIZE_T offsetNatTo = pMap->nativeStartOffset;

if (m_funcletCount == 0 ||

pEHRT == NULL ||

FAILED(pEHRT->m_hrInit))

{

return offsetNatTo;

}

// Multiple sequence points may have the same IL offset, which means that the code is duplicated in

// multiple funclets and/or in the parent method. If the destination offset maps to multiple sequence

// points (and hence to multiple funclets), we try to find the a sequence point which is in the same

// funclet as the source sequence point. If we can't find one, then the operation is going to fail

// anyway, so we just return the first sequence point we find.

for (DebuggerILToNativeMap* pMapCur = pMap + 1;

(pMapCur < pMapEnd) && (pMapCur->ilOffset == pMap->ilOffset);

pMapCur++)

{

int funcletIndexTo = GetFuncletIndex(pMapCur->nativeStartOffset, DebuggerJitInfo::GFIM_BYOFFSET);

if (funcletIndexFrom == funcletIndexTo)

{

return pMapCur->nativeStartOffset;

}

}

return offsetNatTo;

}

#endif // FEATURE_EH_FUNCLETS

// void DebuggerJitInfo::MapILRangeToMapEntryRange(): MIRTMER

// calls MapILOffsetToNative for the startOffset (putting the

// result into start), and the endOffset (putting the result into end).

// SIZE_T startOffset: IL offset from beginning of function.

// SIZE_T endOffset: IL offset from beginngin of function,

// or zero to indicate that the end of the function should be used.

// DebuggerILToNativeMap **start: Contains start & end

// native offsets that correspond to startOffset. Set to NULL if

// there is no mapping info.

// DebuggerILToNativeMap **end: Contains start & end native

// offsets that correspond to endOffset. Set to NULL if there

// is no mapping info.

void DebuggerJitInfo::MapILRangeToMapEntryRange(SIZE_T startOffset,

SIZE_T endOffset,

DebuggerILToNativeMap **start,

DebuggerILToNativeMap **end)

{

CONTRACTL

{

NOTHROW;

GC_NOTRIGGER;

}

CONTRACTL_END;

LOG((LF_CORDB, LL_INFO1000000,

"DJI::MIRTMER: IL 0x%04x-0x%04x\n",

startOffset, endOffset));

if (GetSequenceMapCount() == 0)

{

*start = NULL;

*end = NULL;

return;

}

*start = MapILOffsetToMapEntry(startOffset);

//

// end points to the last range that endOffset maps to, not past

// the last range.

// We want to return the last IL, and exclude the epilog

if (endOffset == 0)

{

*end = GetSequenceMap() + GetSequenceMapCount() - 1;

_ASSERTE(*end>=m_sequenceMap);

while ( ((*end)->ilOffset == (ULONG) ICorDebugInfo::EPILOG||

(*end)->ilOffset == (ULONG) ICorDebugInfo::NO_MAPPING)

&& (*end) > m_sequenceMap)

{

(*end)--;

_ASSERTE(*end>=m_sequenceMap);

}

}

else

*end = MapILOffsetToMapEntry(endOffset - 1, NULL

BIT64_ARG(FALSE));

_ASSERTE(*end>=m_sequenceMap);

LOG((LF_CORDB, LL_INFO1000000,

"DJI::MIRTMER: IL 0x%04x-0x%04x --> 0x%04x 0x%08x-0x%08x\n"

" --> 0x%04x 0x%08x-0x%08x\n",

startOffset, endOffset,

(*start)->ilOffset,

(*start)->nativeStartOffset, (*start)->nativeEndOffset,

(*end)->ilOffset,

(*end)->nativeStartOffset, (*end)->nativeEndOffset));

}

// @dbgtodo Microsoft inspection: This function has been replicated in DacDbiStructures so

// this version can be deleted when inspection is complete.

// DWORD DebuggerJitInfo::MapNativeOffsetToIL(): Given a native

// offset for the DebuggerJitInfo, compute

// the IL offset from the beginning of the same method.

// Returns: Offset of the IL instruction that contains

// the native offset,

// SIZE_T nativeOffset: [IN] Native Offset

// CorDebugMappingResult *map: [OUT] explains the

// quality of the matching & special cases

// SIZE_T which: It's possible to have multiple EPILOGs, or

// multiple unmapped regions within a method. This opaque value

// specifies which special region we're talking about. This

// param has no meaning if map & (MAPPING_EXACT|MAPPING_APPROXIMATE)

// Basically, this gets handed back to MapSpecialToNative, later.

DWORD DebuggerJitInfo::MapNativeOffsetToIL(SIZE_T nativeOffsetToMap,

CorDebugMappingResult *map,

DWORD *which,

BOOL skipPrologs)

{

CONTRACTL

{

NOTHROW;

GC_NOTRIGGER;

PRECONDITION(map != NULL);

PRECONDITION(which != NULL);

}

CONTRACTL_END;

DWORD nativeOffset = (DWORD)nativeOffsetToMap;

(*which) = 0;

DebuggerILToNativeMap *m = GetSequenceMap();

DebuggerILToNativeMap *mEnd = m + GetSequenceMapCount();

LOG((LF_CORDB,LL_INFO10000,"DJI::MNOTI: nativeOffset = 0x%x\n", nativeOffset));

if (m)

{

while (m < mEnd)

{

_ASSERTE(m>=m_sequenceMap);

#ifdef LOGGING

if (m->ilOffset == (ULONG) ICorDebugInfo::PROLOG )

LOG((LF_CORDB,LL_INFO10000,"DJI::MNOTI: m->natStart:0x%x m->natEnd:0x%x il:PROLOG\n", m->nativeStartOffset, m->nativeEndOffset));

else if (m->ilOffset == (ULONG) ICorDebugInfo::EPILOG )

LOG((LF_CORDB,LL_INFO10000,"DJI::MNOTI: m->natStart:0x%x m->natEnd:0x%x il:EPILOG\n", m->nativeStartOffset, m->nativeEndOffset));

else if (m->ilOffset == (ULONG) ICorDebugInfo::NO_MAPPING)

LOG((LF_CORDB,LL_INFO10000,"DJI::MNOTI: m->natStart:0x%x m->natEnd:0x%x il:NO MAP\n", m->nativeStartOffset, m->nativeEndOffset));

else

LOG((LF_CORDB,LL_INFO10000,"DJI::MNOTI: m->natStart:0x%x m->natEnd:0x%x il:0x%x src:0x%x\n", m->nativeStartOffset, m->nativeEndOffset, m->ilOffset, m->source));

#endif // LOGGING

if (m->ilOffset == (ULONG) ICorDebugInfo::PROLOG ||

m->ilOffset == (ULONG) ICorDebugInfo::EPILOG ||

m->ilOffset == (ULONG) ICorDebugInfo::NO_MAPPING)

{

(*which)++;

}

if (nativeOffset >= m->nativeStartOffset

&& ((m->nativeEndOffset == 0 &&

m->ilOffset != (ULONG) ICorDebugInfo::PROLOG)

|| nativeOffset < m->nativeEndOffset))

{

ULONG ilOff = m->ilOffset;

if( m->ilOffset == (ULONG) ICorDebugInfo::PROLOG )

{

if (skipPrologs && nativeOffset < m->nativeEndOffset)

{

// If the caller requested to skip prologs, we simply restart the walk

// with the offset set to the end of the prolog.

nativeOffset = m->nativeEndOffset;

continue;

}

ilOff = 0;

(*map) = MAPPING_PROLOG;

LOG((LF_CORDB,LL_INFO10000,"DJI::MNOTI: MAPPING_PROLOG\n"));

}

else if (m->ilOffset == (ULONG) ICorDebugInfo::NO_MAPPING)

{

ilOff = 0;

(*map) = MAPPING_UNMAPPED_ADDRESS ;

LOG((LF_CORDB,LL_INFO10000,"DJI::MNOTI:MAPPING_"

"UNMAPPED_ADDRESS\n"));

}

else if( m->ilOffset == (ULONG) ICorDebugInfo::EPILOG )

{

ilOff = m_lastIL;

(*map) = MAPPING_EPILOG;

LOG((LF_CORDB,LL_INFO10000,"DJI::MNOTI:MAPPING_EPILOG\n"));

}

else if (nativeOffset == m->nativeStartOffset)

{

(*map) = MAPPING_EXACT;

LOG((LF_CORDB,LL_INFO10000,"DJI::MNOTI:MAPPING_EXACT\n"));

}

else

{

(*map) = MAPPING_APPROXIMATE;

LOG((LF_CORDB,LL_INFO10000,"DJI::MNOTI:MAPPING_"

"APPROXIMATE\n"));

}

return ilOff;

}

m++;

}

}

(*map) = MAPPING_NO_INFO;

LOG((LF_CORDB,LL_INFO10000,"DJI::MNOTI:NO_INFO\n"));

return 0;

}

/******************************************************************************

*

******************************************************************************/

DebuggerJitInfo::~DebuggerJitInfo()

{

TRACE_FREE(m_sequenceMap);

if (m_sequenceMap != NULL)

{

DeleteInteropSafe(((BYTE *)m_sequenceMap));

}

TRACE_FREE(m_varNativeInfo);

if (m_varNativeInfo != NULL)

{

DeleteInteropSafe(m_varNativeInfo);

}

#if defined(FEATURE_EH_FUNCLETS)

if (m_rgFunclet)

{

DeleteInteropSafe(m_rgFunclet);

m_rgFunclet = NULL;

}

#endif // FEATURE_EH_FUNCLETS

#ifdef _DEBUG

// Trash pointers to garbage.

// Don't null out since there may be runtime checks against NULL.

// Set to a non-null random pointer value that will cause an immediate AV on deref.

m_methodInfo = (DebuggerMethodInfo*) 0x1;

m_prevJitInfo = (DebuggerJitInfo*) 0x01;

m_nextJitInfo = (DebuggerJitInfo*) 0x01;

#endif

LOG((LF_CORDB,LL_EVERYTHING, "DJI::~DJI : deleted at 0x%p\n", this));

}

// Lazy initialize the Debugger-Jit-Info

void DebuggerJitInfo::LazyInitBounds()

{

CONTRACTL

{

NOTHROW;

GC_NOTRIGGER;

PRECONDITION(ThisMaybeHelperThread());

PRECONDITION(!g_pDebugger->HasDebuggerDataLock());

} CONTRACTL_END;

LOG((LF_CORDB, LL_EVERYTHING, "DJI::LazyInitBounds: this=0x%x m_fAttemptInit %s\n", this, m_fAttemptInit == true ? "true": "false"));

// Only attempt lazy-init once

if (m_fAttemptInit)

{

return;

}

EX_TRY

{

LOG((LF_CORDB, LL_EVERYTHING, "DJI::LazyInitBounds: this=0x%x Initing\n", this));

// Should have already been jitted

_ASSERTE(this->m_jitComplete);

MethodDesc * mdesc = this->m_nativeCodeVersion.GetMethodDesc();

DebugInfoRequest request;

_ASSERTE(this->m_addrOfCode != NULL); // must have address to disambguate the Enc cases.

// Caller already resolved generics when they craeted the DJI, so we don't need to repeat.

// Note the MethodDesc may not yet have the jitted info, so we'll also use the starting address we got in the jit complete callback.

request.InitFromStartingAddr(mdesc, (PCODE)this->m_addrOfCode);

// Bounds info.

ULONG32 cMap = 0;

ICorDebugInfo::OffsetMapping *pMap = NULL;

ULONG32 cVars = 0;

ICorDebugInfo::NativeVarInfo *pVars = NULL;

BOOL fSuccess = DebugInfoManager::GetBoundariesAndVars(

request,

InteropSafeNew, NULL, // allocator

&cMap, &pMap,

&cVars, &pVars);

LOG((LF_CORDB,LL_EVERYTHING, "DJI::LazyInitBounds: this=0x%x GetBoundariesAndVars success=0x%x\n", this, fSuccess));

// SetBoundaries uses the CodeVersionManager, need to take it now for lock ordering reasons

CodeVersionManager::TableLockHolder lockHolder(mdesc->GetCodeVersionManager());

Debugger::DebuggerDataLockHolder debuggerDataLockHolder(g_pDebugger);

if (!m_fAttemptInit)

{

if (fSuccess)

{

this->SetBoundaries(cMap, pMap);

this->SetVars(cVars, pVars);

}

m_fAttemptInit = true;

}

else

{

DeleteInteropSafe(pMap);

DeleteInteropSafe(pVars);

}

// DebuggerDataLockHolder out of scope - release implied

}

EX_CATCH

{

LOG((LF_CORDB,LL_WARNING, "DJI::LazyInitBounds: this=0x%x Exception was thrown and caught\n", this));

// Just catch the exception. The DJI maps may or may-not be intialized,

// but they should still be in a consistent state, so we should be ok.

}

EX_END_CATCH(SwallowAllExceptions)

}

/******************************************************************************

* SetVars() takes ownership of pVars

******************************************************************************/

void DebuggerJitInfo::SetVars(ULONG32 cVars, ICorDebugInfo::NativeVarInfo *pVars)

{

LIMITED_METHOD_CONTRACT;

_ASSERTE(m_varNativeInfo == NULL);

m_varNativeInfo = pVars;

m_varNativeInfoCount = cVars;

LOG((LF_CORDB, LL_INFO1000000, "D::sV: var count is %d\n",

m_varNativeInfoCount));

#ifdef LOGGING

for (unsigned int i = 0; i < m_varNativeInfoCount; i++)

{

ICorDebugInfo::NativeVarInfo* vni = &(m_varNativeInfo[i]);

_dumpVarNativeInfo(vni);

}

#endif

}

CHECK DebuggerJitInfo::Check() const

{

LIMITED_METHOD_CONTRACT;

CHECK_OK;

}

// Invariants for a DebuggerJitInfo

// These should always be true at any well defined point.

CHECK DebuggerJitInfo::Invariant() const

{

LIMITED_METHOD_CONTRACT;

CHECK((m_sequenceMapCount == 0) == (m_sequenceMap == NULL));