mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
641 lines
23 KiB
641 lines
23 KiB
/***
|
|
*trnsctrl.cpp -
|
|
*
|
|
* Copyright (c) 1990-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
*
|
|
*Revision History:
|
|
* 06-01-97 Created by TiborL.
|
|
* 07-12-99 RDL Image relative fixes under CC_P7_SOFT25.
|
|
* 10-07-99 SAH utc_p7#1126: fix ipsr.ri reset.
|
|
* 10-19-99 TGL Miscellaneous unwind fixes.
|
|
* 03-15-00 PML Remove CC_P7_SOFT25, which is now on permanently.
|
|
* 03-30-00 SAH New version of GetLanguageSpecificData from ntia64.h.
|
|
* 06-08-00 RDL VS#111429: IA64 workaround for AV while handling throw.
|
|
*
|
|
****/
|
|
|
|
#if defined(_NTSUBSET_)
|
|
extern "C" {
|
|
#include <nt.h>
|
|
#include <ntrtl.h>
|
|
#include <nturtl.h>
|
|
#include <ntstatus.h> // STATUS_UNHANDLED_EXCEPTION
|
|
#include <ntos.h>
|
|
#include <ex.h> // ExRaiseException
|
|
}
|
|
#endif
|
|
|
|
extern "C" {
|
|
#include <windows.h>
|
|
};
|
|
|
|
#include <mtdll.h>
|
|
|
|
#include <ehassert.h>
|
|
#include <ehdata.h>
|
|
#include <trnsctrl.h>
|
|
#include <ehstate.h>
|
|
#include <eh.h>
|
|
#include <ehhooks.h>
|
|
#include <kxia64.h>
|
|
#include <ia64inst.h>
|
|
#include <cvconst.h>
|
|
#pragma hdrstop
|
|
|
|
#ifdef _MT
|
|
#define pFrameInfoChain (*((FRAMEINFO **) &(_getptd()->_pFrameInfoChain)))
|
|
#define pUnwindContext (*((CONTEXT **) &(_getptd()->_pUnwindContext)))
|
|
#define _ImageBase (_getptd()->_ImageBase)
|
|
#define _TargetGp (_getptd()->_TargetGp)
|
|
#define _ThrowImageBase (_getptd()->_ThrowImageBase)
|
|
#define _pCurrentException (*((EHExceptionRecord **)&(_getptd()->_curexception)))
|
|
#else
|
|
static FRAMEINFO *pFrameInfoChain = NULL; // used to remember nested frames
|
|
static CONTEXT *pUnwindContext = NULL; // context to assist the return to 'UnwindNestedFrames'
|
|
static unsigned __int64 _ImageBase = 0;
|
|
static unsigned __int64 _ThrowImageBase = 0;
|
|
static unsigned __int64 _TargetGp = 0;
|
|
extern EHExceptionRecord *_pCurrentException; // defined in frame.cpp
|
|
#endif
|
|
|
|
// Should be used out of ntia64.h, but can't figure out how to allow that with
|
|
// existing dependencies.
|
|
// If GetLanguageSpecificData changes cause a redefinition error rather than
|
|
// using wrong version.
|
|
// Version 2 = soft2.3 conventions
|
|
// Version 3 = soft2.6 conventions
|
|
#define GetLanguageSpecificData(f, base) \
|
|
((((PUNWIND_INFO)(base + f->UnwindInfoAddress))->Version <= 2) ? \
|
|
(((PVOID)(base + f->UnwindInfoAddress + sizeof(UNWIND_INFO) + \
|
|
((PUNWIND_INFO)(base+f->UnwindInfoAddress))->DataLength*sizeof(ULONGLONG) + sizeof(ULONGLONG)))) : \
|
|
(((PVOID)(base + f->UnwindInfoAddress + sizeof(UNWIND_INFO) + \
|
|
((PUNWIND_INFO)(base+f->UnwindInfoAddress))->DataLength*sizeof(ULONGLONG) + sizeof(ULONG)))))
|
|
|
|
extern "C" VOID RtlRestoreContext (PCONTEXT ContextRecord,PEXCEPTION_RECORD ExceptionRecord OPTIONAL);
|
|
extern "C" void RtlCaptureContext(CONTEXT*);
|
|
extern "C" void _GetNextInstrOffset(PVOID*);
|
|
extern "C" void __FrameUnwindToState(EHRegistrationNode *, DispatcherContext *, FuncInfo *, __ehstate_t);
|
|
|
|
//
|
|
// Returns the establisher frame pointers. For catch handlers it is the parent's frame pointer.
|
|
//
|
|
EHRegistrationNode *_GetEstablisherFrame(
|
|
EHRegistrationNode *pRN,
|
|
DispatcherContext *pDC,
|
|
FuncInfo *pFuncInfo,
|
|
EHRegistrationNode *pEstablisher
|
|
) {
|
|
TryBlockMapEntry *pEntry;
|
|
unsigned num_of_try_blocks = FUNC_NTRYBLOCKS(*pFuncInfo);
|
|
unsigned index;
|
|
__ehstate_t curState;
|
|
|
|
curState = _StateFromControlPc(pFuncInfo, pDC);
|
|
pEstablisher->MemoryStackFp = pRN->MemoryStackFp;
|
|
pEstablisher->BackingStoreFp = pRN->BackingStoreFp;
|
|
for (index = 0; index < num_of_try_blocks; index++) {
|
|
pEntry = FUNC_PTRYBLOCK(*pFuncInfo, index, pDC->ImageBase);
|
|
if (curState > TBME_HIGH(*pEntry) && curState <= TBME_CATCHHIGH(*pEntry)) {
|
|
pEstablisher->MemoryStackFp = *(__int64 *)OffsetToAddress(-8,pRN->MemoryStackFp);
|
|
pEstablisher->BackingStoreFp = *(__int64 *)OffsetToAddress(-16,pRN->BackingStoreFp);
|
|
break;
|
|
}
|
|
}
|
|
return pEstablisher;
|
|
}
|
|
|
|
#if 0 // v-vadimp new version with NLG support for the debugger is in handlers.s
|
|
//
|
|
// Temporary version until the asm version is written that supports NLG
|
|
//
|
|
extern "C" void* _CallSettingFrame(
|
|
void* handler,
|
|
EHRegistrationNode *pEstablisher,
|
|
ULONG NLG_CODE)
|
|
{
|
|
void* retValue = __Cxx_ExecuteHandler(
|
|
pEstablisher->MemoryStackFp,
|
|
pEstablisher->BackingStoreFp,
|
|
(__int64)handler,
|
|
_TargetGp
|
|
);
|
|
return retValue? (void*)(_ImageBase + (__int32)retValue) : NULL;
|
|
}
|
|
#endif
|
|
|
|
extern "C" CONTEXT* _GetUnwindContext()
|
|
{
|
|
return pUnwindContext;
|
|
}
|
|
|
|
extern "C" unsigned __int64 _GetImageBase()
|
|
{
|
|
return _ImageBase;
|
|
}
|
|
|
|
extern "C" VOID _SetImageBase(unsigned __int64 ImageBaseToRestore)
|
|
{
|
|
_ImageBase = ImageBaseToRestore;
|
|
}
|
|
|
|
extern "C" unsigned __int64 _GetThrowImageBase()
|
|
{
|
|
return _ThrowImageBase;
|
|
}
|
|
|
|
extern "C" VOID _SetThrowImageBase(unsigned __int64 NewThrowImageBase)
|
|
{
|
|
_ThrowImageBase = NewThrowImageBase;
|
|
}
|
|
|
|
extern "C" unsigned __int64 _GetTargetGP(unsigned __int64 TargetAddress)
|
|
{
|
|
unsigned __int64 ImageBase;
|
|
unsigned __int64 TargetGp;
|
|
|
|
PRUNTIME_FUNCTION pContFunctionEntry = RtlLookupFunctionEntry(TargetAddress, &ImageBase, &TargetGp);
|
|
// return _TargetGp;
|
|
return TargetGp;
|
|
}
|
|
|
|
extern "C" VOID _MoveContext(CONTEXT* pTarget, CONTEXT* pSource)
|
|
{
|
|
RtlMoveMemory(pTarget, pSource, sizeof(CONTEXT));
|
|
}
|
|
|
|
// This function returns the try block for the given state if the state is in a
|
|
// catch; otherwise, NULL is returned.
|
|
|
|
static __inline TryBlockMapEntry *_CatchTryBlock(
|
|
FuncInfo *pFuncInfo,
|
|
__ehstate_t curState
|
|
) {
|
|
TryBlockMapEntry *pEntry;
|
|
unsigned num_of_try_blocks = FUNC_NTRYBLOCKS(*pFuncInfo);
|
|
unsigned index;
|
|
|
|
for (index = 0; index < num_of_try_blocks; index++) {
|
|
pEntry = FUNC_PTRYBLOCK(*pFuncInfo, index, _ImageBase);
|
|
if (curState > TBME_HIGH(*pEntry) && curState <= TBME_CATCHHIGH(*pEntry)) {
|
|
return pEntry;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
//
|
|
// This routine returns TRUE if we are executing from within a catch. Otherwise, FALSE is returned.
|
|
//
|
|
|
|
BOOL _ExecutionInCatch(
|
|
DispatcherContext *pDC,
|
|
FuncInfo *pFuncInfo
|
|
) {
|
|
__ehstate_t curState = _StateFromControlPc(pFuncInfo, pDC);
|
|
return _CatchTryBlock(pFuncInfo, curState)? TRUE : FALSE;
|
|
}
|
|
|
|
// This function unwinds to the empty state.
|
|
|
|
VOID __FrameUnwindToEmptyState(
|
|
EHRegistrationNode *pRN,
|
|
DispatcherContext *pDC,
|
|
FuncInfo *pFuncInfo
|
|
) {
|
|
__ehstate_t stateFromControlPC;
|
|
TryBlockMapEntry *pEntry;
|
|
EHRegistrationNode EstablisherFramePointers, *pEstablisher;
|
|
|
|
pEstablisher = _GetEstablisherFrame(pRN, pDC, pFuncInfo, &EstablisherFramePointers);
|
|
stateFromControlPC = _StateFromControlPc(pFuncInfo, pDC);
|
|
pEntry = _CatchTryBlock(pFuncInfo, stateFromControlPC);
|
|
|
|
// Reuse pFrameInfoChain->State to propagate the previous catch block's final state.
|
|
// This is used in case there is a nested catch inside this catch
|
|
// who already dtored object's in our frame. This can happen if in our catch
|
|
// there is a nested catch that throws and the catch executed is an outer catch.
|
|
//
|
|
//try{
|
|
// try{
|
|
// throw(1);
|
|
// }catch(int){
|
|
// B b4;
|
|
// try{
|
|
// throw 2;
|
|
// }catch(int){
|
|
// //this throw would dtor b4 by calling the outermost catch,
|
|
// //and also during unwinding the first catch would try to dtor as well.
|
|
// throw 3;
|
|
// }
|
|
// }
|
|
//}catch(int){
|
|
// throw 4;
|
|
//}
|
|
//
|
|
if( pEntry && pFrameInfoChain != NULL ) {
|
|
__ehstate_t curState = GetCurrentState(pEstablisher, pDC, pFuncInfo);
|
|
if( pFrameInfoChain->State != -2 && pFrameInfoChain->State < curState )
|
|
SetState(pEstablisher, pDC, pFuncInfo, pFrameInfoChain->State);
|
|
pFrameInfoChain->State = curState;
|
|
}
|
|
else if( pFrameInfoChain != NULL ) {
|
|
__ehstate_t curState = GetCurrentState(pEstablisher, pDC, pFuncInfo);
|
|
if( pEntry == NULL && stateFromControlPC < curState ) {
|
|
SetState(pEstablisher, pDC, pFuncInfo, stateFromControlPC - 1);
|
|
}
|
|
pFrameInfoChain->State = -2;
|
|
}
|
|
__FrameUnwindToState(pEstablisher, pDC,
|
|
pFuncInfo, pEntry == NULL ? EH_EMPTY_STATE : TBME_HIGH(*pEntry) /*+ 1*/);
|
|
}
|
|
|
|
BOOL _IsExceptionObjectDestroyed(PVOID pExceptionObject,FRAMEINFO *pFrameInfo)
|
|
{
|
|
for (; pFrameInfo != NULL; pFrameInfo = pFrameInfo->pNext ) {
|
|
if( pFrameInfo->pExceptionObjectDestroyed == pExceptionObject ) {
|
|
return TRUE;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
void _MarkExceptionObjectDestroyed(EHExceptionRecord *pExcept)
|
|
{
|
|
for (FRAMEINFO *pFrameInfo = pFrameInfoChain; pFrameInfo != NULL; pFrameInfo = pFrameInfo->pNext ) {
|
|
if( pFrameInfo->pExcept == pExcept ) {
|
|
pFrameInfo->pExceptionObjectDestroyed = PER_PEXCEPTOBJ(pExcept);
|
|
}
|
|
}
|
|
}
|
|
|
|
void _UnlinkFrame(FRAMEINFO *pFrameInfo)
|
|
{
|
|
FRAMEINFO *pPrevFrameInfo = pFrameInfoChain;
|
|
|
|
if( pFrameInfoChain == pFrameInfo ) {
|
|
pFrameInfoChain = pFrameInfoChain->pNext;
|
|
return;
|
|
}
|
|
for (FRAMEINFO *pCurFrameInfo = pFrameInfoChain; pCurFrameInfo != NULL; pCurFrameInfo = pCurFrameInfo->pNext ) {
|
|
if( pCurFrameInfo == pFrameInfo ) {
|
|
pPrevFrameInfo->pNext = pCurFrameInfo->pNext;
|
|
return;
|
|
}
|
|
pPrevFrameInfo = pCurFrameInfo;
|
|
}
|
|
}
|
|
|
|
// Find the frame info structure corresponding to the given address. Return
|
|
// NULL if the frame info structure does not exist.
|
|
|
|
FRAMEINFO *_FindFrameInfo(
|
|
PVOID pContinuation,
|
|
FRAMEINFO *pFrameInfo
|
|
) {
|
|
unsigned __int64 ImageBase;
|
|
unsigned __int64 TargetGp;
|
|
|
|
PRUNTIME_FUNCTION pContFunctionEntry = RtlLookupFunctionEntry((unsigned __int64)pContinuation, &ImageBase, &TargetGp);
|
|
PRUNTIME_FUNCTION pFrameFunctionEntry = pFrameInfo->pFunctionEntry;
|
|
|
|
DASSERT(pFrameInfo != NULL);
|
|
|
|
for (; pFrameInfo != NULL; pFrameInfo = pFrameInfo->pNext ) {
|
|
if (pContFunctionEntry == pFrameInfo->pFunctionEntry &&
|
|
(pContinuation > OffsetToAddress(pFrameInfo->pFunctionEntry->BeginAddress,ImageBase)) &&
|
|
(pContinuation <= OffsetToAddress(pFrameInfo->pFunctionEntry->EndAddress,ImageBase))
|
|
|
|
){
|
|
return pFrameInfo;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
BOOL __IsFramePdataMatch(
|
|
PVOID pContinuation,
|
|
RUNTIME_FUNCTION* pFrameRfe)
|
|
{
|
|
BOOL fRetVal = FALSE;
|
|
unsigned __int64 ImageBase, TargetGp;
|
|
PRUNTIME_FUNCTION pContRfe = RtlLookupFunctionEntry((unsigned __int64) pContinuation, &ImageBase, &TargetGp);
|
|
FuncInfo* pContFuncInfo = (FuncInfo*)(ImageBase + *(PULONG)GetLanguageSpecificData(pContRfe, ImageBase));
|
|
FuncInfo* pFrameFuncInfo = (FuncInfo*)(ImageBase + *(PULONG)GetLanguageSpecificData(pFrameRfe, ImageBase));
|
|
|
|
//
|
|
// first see if there is a regular match, i.e. if the RFE registered with the frame
|
|
// matches the RFE for the continuation address
|
|
//
|
|
fRetVal = (pContRfe == pFrameRfe) &&
|
|
(pContinuation > OffsetToAddress(pFrameRfe->BeginAddress,ImageBase)) &&
|
|
(pContinuation <= OffsetToAddress(pFrameRfe->EndAddress,ImageBase));
|
|
|
|
if (!fRetVal && (pContFuncInfo->bbtFlags == BBT_UNIQUE_FUNCINFO)) {
|
|
fRetVal = (pContFuncInfo == pFrameFuncInfo);
|
|
}
|
|
|
|
return fRetVal;
|
|
}
|
|
|
|
//
|
|
// Given the address of a continuation point, return the corresponding context.
|
|
// Each frame info was saved just before a catch handler was called.
|
|
// The most recently encountered frame is at the head of the chain.
|
|
// The routine starts out with the frame given as the second argument, and scans the
|
|
// linked list for the frame that corresponds to the continuation point.
|
|
//
|
|
CONTEXT* _FindAndUnlinkFrame(PVOID pContinuation, FRAMEINFO *pFrameInfo)
|
|
{
|
|
|
|
DASSERT(pFrameInfo != NULL);
|
|
|
|
for( ; pFrameInfo != NULL; pFrameInfo = pFrameInfo->pNext ) {
|
|
if(__IsFramePdataMatch(pContinuation, pFrameInfo->pFunctionEntry)) {
|
|
//
|
|
// We found the frame.
|
|
// All frames preceeding and including this one are gone. so unlink them.
|
|
//
|
|
CONTEXT* pExitContext = pFrameInfo->pExitContext;
|
|
|
|
pFrameInfoChain = pFrameInfo->pNext;
|
|
//
|
|
// If there are no more exceptions are pending get rid of unneeded frame info records.
|
|
//
|
|
if( _pCurrentException == NULL ) {
|
|
while( pFrameInfoChain != NULL && pFrameInfoChain->pExceptionObjectDestroyed ) {
|
|
pFrameInfoChain = pFrameInfoChain->pNext;
|
|
}
|
|
}
|
|
return pExitContext;
|
|
}
|
|
}
|
|
DASSERT(pFrameInfo != NULL);
|
|
return NULL;
|
|
}
|
|
|
|
//
|
|
// Save the frame information for this scope. Put it at the head of the linked-list.
|
|
//
|
|
FRAMEINFO* _CreateFrameInfo(
|
|
FRAMEINFO *pFrameInfo,
|
|
DispatcherContext *pDC,
|
|
CONTEXT *pExitContext,
|
|
__ehstate_t State,
|
|
PVOID pExceptionObjectDestroyed,
|
|
EHExceptionRecord *pExcept
|
|
) {
|
|
pFrameInfo->pFunctionEntry = pDC->FunctionEntry;
|
|
pFrameInfo->pExitContext = pExitContext;
|
|
pFrameInfo->pExceptionObjectDestroyed = pExceptionObjectDestroyed;
|
|
pFrameInfo->pExceptionObjectToBeDestroyed = NULL;
|
|
pFrameInfo->pExcept = pExcept;
|
|
pFrameInfo->State = State;
|
|
pFrameInfo->dtorThrowFlag = FALSE;
|
|
pFrameInfo->isRethrow = FALSE;
|
|
if( pFrameInfoChain != NULL && pFrameInfoChain->dtorThrowFlag ) {
|
|
pFrameInfoChain->dtorThrowFlag = FALSE;
|
|
pFrameInfoChain = pFrameInfoChain->pNext;
|
|
}
|
|
pFrameInfo->pNext = (pFrameInfo < pFrameInfoChain)? pFrameInfoChain : NULL;
|
|
pFrameInfoChain = pFrameInfo;
|
|
return pFrameInfo;
|
|
}
|
|
|
|
//
|
|
// THIS ROUTINE IS USED ONLY TO JUMP TO THE CONTINUATION POINT
|
|
//
|
|
// Sets SP and jumps to specified code address.
|
|
// Does not return.
|
|
//
|
|
void _JumpToContinuation(
|
|
unsigned __int64 TargetAddress, // The target address to call
|
|
CONTEXT *pContext, // Context of target function
|
|
EHExceptionRecord *pExcept
|
|
) {
|
|
unsigned __int64 ImageBase;
|
|
unsigned __int64 TargetGp;
|
|
|
|
|
|
PRUNTIME_FUNCTION pFunctionEntry = RtlLookupFunctionEntry(TargetAddress, &ImageBase, &TargetGp);
|
|
|
|
pContext->StIIP = TargetAddress;
|
|
pContext->IntGp = TargetGp;
|
|
pContext->StIPSR &= ~IPSR_RI_MASK;
|
|
RtlRestoreContext(pContext,(PEXCEPTION_RECORD)pExcept);
|
|
}
|
|
|
|
//
|
|
// Prototype for the internal handler
|
|
//
|
|
extern "C" EXCEPTION_DISPOSITION __InternalCxxFrameHandler(
|
|
EHExceptionRecord *pExcept, // Information for this exception
|
|
EHRegistrationNode *pRN, // Dynamic information for this frame
|
|
CONTEXT *pContext, // Context info
|
|
DispatcherContext *pDC, // More dynamic info for this frame
|
|
FuncInfo *pFuncInfo, // Static information for this frame
|
|
int CatchDepth, // How deeply nested are we?
|
|
EHRegistrationNode *pMarkerRN, // Marker node for when checking inside catch block
|
|
BOOL recursive); // True if this is a translation exception
|
|
|
|
//
|
|
// __CxxFrameHandler - Real entry point to the runtime
|
|
//
|
|
extern "C" _CRTIMP EXCEPTION_DISPOSITION __CxxFrameHandler(
|
|
EHExceptionRecord *pExcept, // Information for this exception
|
|
__int64 MemoryStackFp, // SP of user program
|
|
__int64 BackingStoreFp, // BSP of user program
|
|
CONTEXT *pContext, // Context info
|
|
DispatcherContext *pDC, // More dynamic info for this frame
|
|
__int64 TargetGp // GP of user program
|
|
) {
|
|
FuncInfo *pFuncInfo;
|
|
EXCEPTION_DISPOSITION result;
|
|
EHRegistrationNode EstablisherFrame = { MemoryStackFp, BackingStoreFp };
|
|
|
|
_ImageBase = pDC->ImageBase;
|
|
_TargetGp = TargetGp;
|
|
_ThrowImageBase = (unsigned __int64)pExcept->params.pThrowImageBase;
|
|
pFuncInfo = (FuncInfo*)(_ImageBase + *(PULONG)GetLanguageSpecificData(pDC->FunctionEntry, _ImageBase));
|
|
result = __InternalCxxFrameHandler( pExcept, &EstablisherFrame, pContext, pDC, pFuncInfo, 0, NULL, FALSE );
|
|
return result;
|
|
}
|
|
|
|
// Call the SEH to EH translator.
|
|
|
|
BOOL _CallSETranslator(
|
|
EHExceptionRecord *pExcept, // The exception to be translated
|
|
EHRegistrationNode *pRN, // Dynamic info of function with catch
|
|
CONTEXT *pContext, // Context info
|
|
DispatcherContext *pDC, // More dynamic info of function with catch (ignored)
|
|
FuncInfo *pFuncInfo, // Static info of function with catch
|
|
ULONG CatchDepth, // How deeply nested in catch blocks are we?
|
|
EHRegistrationNode *pMarkerRN // Marker for parent context
|
|
) {
|
|
pRN;
|
|
pDC;
|
|
pFuncInfo;
|
|
CatchDepth;
|
|
|
|
// Call the translator.
|
|
|
|
_EXCEPTION_POINTERS excptr = { (PEXCEPTION_RECORD)pExcept, pContext };
|
|
|
|
__pSETranslator(PER_CODE(pExcept), &excptr);
|
|
|
|
// If we got back, then we were unable to translate it.
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
//
|
|
// This structure is the FuncInfo (HandlerData) for handler __TranslatorGuardHandler
|
|
//
|
|
struct TransGuardRec {
|
|
FuncInfo *pFuncInfo; // Static info for subject function
|
|
EHRegistrationNode *pFrame; // Dynamic info for subject function
|
|
ULONG CatchDepth; // How deeply nested are we?
|
|
EHRegistrationNode *pMarkerFrame; // Marker for parent context
|
|
PVOID pContinue; // Continuation address within CallSEHTranslator
|
|
PVOID pSP; // SP within CallSEHTranslator
|
|
BOOL DidUnwind; // True if this frame was unwound
|
|
};
|
|
|
|
#if 0
|
|
//
|
|
// This routine is the handler for CallSETranslator which is defined in handlers.s
|
|
//
|
|
extern "C" _CRTIMP EXCEPTION_DISPOSITION __TranslatorGuardHandler(
|
|
EHExceptionRecord *pExcept, // Information for this exception
|
|
EHRegistrationNode *pFrame, // The translator guard frame
|
|
CONTEXT *pContext, // Context info
|
|
DispatcherContext *pDC // Dynamic info for this frame
|
|
) {
|
|
//
|
|
// The handler data is a pointer to an integer that is an offset to the TGRN structure
|
|
// relative to the frame pointer.
|
|
//
|
|
TransGuardRec *pTransGuardData = (TransGuardRec*)((char*)pFrame->MemoryStackFp - *(int*)(pDC->FunctionEntry->HandlerData));
|
|
if (IS_UNWINDING(PER_FLAGS(pExcept)))
|
|
{
|
|
pTransGuardData->DidUnwind = TRUE;
|
|
return ExceptionContinueSearch;
|
|
}
|
|
else {
|
|
//
|
|
// Check for a handler:
|
|
//
|
|
__InternalCxxFrameHandler( pExcept,
|
|
pTransGuardData->pFrame,
|
|
pContext,
|
|
pDC,
|
|
pTransGuardData->pFuncInfo,
|
|
pTransGuardData->CatchDepth,
|
|
pTransGuardData->pMarkerFrame,
|
|
TRUE );
|
|
// Unreached.
|
|
return ExceptionContinueSearch;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// _GetRangeOfTrysToCheck - determine which try blocks are of interest, given
|
|
// the current catch block nesting depth. We only check the trys at a single
|
|
// depth.
|
|
//
|
|
// Returns:
|
|
// Address of first try block of interest is returned
|
|
// pStart and pEnd get the indices of the range in question
|
|
//
|
|
TryBlockMapEntry* _GetRangeOfTrysToCheck(
|
|
EHRegistrationNode *pRN,
|
|
FuncInfo *pFuncInfo,
|
|
int CatchDepth,
|
|
__ehstate_t curState,
|
|
unsigned *pStart,
|
|
unsigned *pEnd,
|
|
DispatcherContext *pDC
|
|
) {
|
|
TryBlockMapEntry *pEntry;
|
|
unsigned num_of_try_blocks = FUNC_NTRYBLOCKS(*pFuncInfo);
|
|
|
|
DASSERT( num_of_try_blocks > 0 );
|
|
|
|
for( unsigned int index = 0; index < num_of_try_blocks; index++ ) {
|
|
pEntry = FUNC_PTRYBLOCK(*pFuncInfo, index, pDC->ImageBase);
|
|
if( curState >= TBME_LOW(*pEntry) && curState <= TBME_HIGH(*pEntry) ) {
|
|
*pStart = index;
|
|
|
|
*pEnd = FUNC_NTRYBLOCKS(*pFuncInfo);
|
|
DASSERT( *pEnd <= num_of_try_blocks && *pStart < *pEnd );
|
|
|
|
#if 1
|
|
int SavedState = GetUnwindTryBlock(pRN, pDC, pFuncInfo);
|
|
if( SavedState != -1 && SavedState >= curState )
|
|
continue;
|
|
#else
|
|
int SavedTryNdx = GetUnwindTryBlock(pRN, pDC, pFuncInfo);
|
|
if( SavedTryNdx != -1 ) {
|
|
*pStart = SavedTryNdx + 1;
|
|
if( *pStart < *pEnd && pEntry != NULL ) {
|
|
pEntry = FUNC_PTRYBLOCK(*pFuncInfo, SavedTryNdx + 1, pDC->ImageBase);
|
|
}
|
|
}
|
|
#endif
|
|
return pEntry;
|
|
}
|
|
}
|
|
|
|
*pStart = *pEnd = 0;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
#pragma optimize("",off)
|
|
extern "C" unsigned __int64 __getReg(int);
|
|
extern "C" void __setReg(int, unsigned __int64);
|
|
#pragma intrinsic(__getReg)
|
|
#pragma intrinsic(__setReg)
|
|
extern "C" void _UnwindNestedFrames(
|
|
EHRegistrationNode *pFrame, // Unwind up to (but not including) this frame
|
|
EHExceptionRecord *pExcept, // The exception that initiated this unwind
|
|
CONTEXT *pContext // Context info for current exception
|
|
) {
|
|
CONTEXT LocalContext; // Create context for this routine to return from RtlUnwind
|
|
CONTEXT ScratchContext; // Context record to pass to RtlUnwind2 to be used as scratch
|
|
volatile int Unwound = FALSE; // Flag that assist to return from RtlUnwind2
|
|
PVOID pReturnPoint = NULL; // The address we want to return from RtlUnwind2
|
|
|
|
RtlCaptureContext(&LocalContext);
|
|
//
|
|
// set up the return label
|
|
//
|
|
_GetNextInstrOffset(&pReturnPoint);
|
|
if(Unwound)
|
|
goto LAB_UNWOUND;
|
|
|
|
LocalContext.StIIP = (ULONGLONG)pReturnPoint;
|
|
LocalContext.IntGp = __getReg(CV_IA64_IntR1);
|
|
LocalContext.StIPSR &= ~IPSR_RI_MASK;
|
|
pUnwindContext = &LocalContext; // save address of LocalContext in global/TLS pUnwindContext
|
|
Unwound = TRUE;
|
|
#ifdef _NT
|
|
RtlUnwind2(*pFrame, (ULONG_PTR)pReturnPoint, (PEXCEPTION_RECORD)pExcept, NULL, &ScratchContext);
|
|
#else
|
|
RtlUnwind2(*pFrame, pReturnPoint, (PEXCEPTION_RECORD)pExcept, NULL, &ScratchContext);
|
|
#endif
|
|
|
|
LAB_UNWOUND:
|
|
__setReg(CV_IA64_IntR1,LocalContext.IntGp);
|
|
pContext->StIPSR &= ~IPSR_RI_MASK;
|
|
PER_FLAGS(pExcept) &= ~EXCEPTION_UNWINDING;
|
|
//
|
|
// reset global/TLS pUnwindContext for future exceptions
|
|
//
|
|
pUnwindContext = NULL;
|
|
}
|