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.
2088 lines
76 KiB
2088 lines
76 KiB
/***
|
|
*frame.cxx - The frame handler and everything associated with it.
|
|
*
|
|
* Copyright (c) 1993-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* The frame handler and everything associated with it.
|
|
*
|
|
* Entry points:
|
|
* _CxxFrameHandler - the frame handler.
|
|
*
|
|
* Open issues:
|
|
* Handling re-throw from dynamicly nested scope.
|
|
* Fault-tolerance (checking for data structure validity).
|
|
*
|
|
*Revision History:
|
|
* 05-20-93 BS Module created
|
|
* 03-03-94 TL Added Mips specific code
|
|
* 06-19-94 AD Added Alpha specific code (Al Dosser)
|
|
* 10-17-94 BWT Disable code for PPC.
|
|
* 11-23-94 JWM Removed obsolete 'hash' check in TypeMatch().
|
|
* 11-29-94 JWM AdjustPointer() now adds in pdisp, not vdisp.
|
|
* 01-13-95 JWM Added _NLG_Destination struct; dwCode set for catch
|
|
* blocks & local destructors.
|
|
* 02-09-95 JWM Mac merge.
|
|
* 02-10-95 JWM UnhandledExceptionFilter() now called if exception
|
|
* raised during stack unwind.
|
|
* 03-22-95 PML Add const for read-only compiler-gen'd structs
|
|
* 04-14-95 JWM Re-fix EH/SEH exception handling.
|
|
* 04-17-95 JWM FrameUnwindFilter() must be #ifdef _WIN32.
|
|
* 04-21-95 JWM _NLG_Destination moved to exsup3.asm (_M_X86 only).
|
|
* 04-21-95 TGL Added Mips fixes.
|
|
* 04-27-95 JWM EH_ABORT_FRAME_UNWIND_PART now #ifdef
|
|
* ALLOW_UNWIND_ABORT.
|
|
* 05-19-95 DAK Don't initialize the kernel handler
|
|
* 06-07-95 JWM Various NLG additions.
|
|
* 06-14-95 JWM Unneeded LastError calls removed.
|
|
* 06-19-95 JWM NLG no longer uses per-thread data (X86 only).
|
|
* 09-26-95 AMP PowerMac avoids re-throws to same catch clause
|
|
* 08-06-95 JWM Typo fixed (Orion #6509); Alpha-specific.
|
|
* 04-18-97 JWM In __InternalCxxFrameHandler(), 'recursive' changed to
|
|
* BOOLEAN.
|
|
* 06-01-97 TGL Added P7 specific code
|
|
* 08-22-97 TGL More P7 fixes
|
|
* 11-14-98 JWM Merge with P7 sources.
|
|
* 02-11-99 TGL EH: correct catch in exe calling dll.
|
|
* 05-17-99 PML Remove all Macintosh support.
|
|
* 07-12-99 RDL Image relative fixes under CC_P7_SOFT25.
|
|
* 10-17-99 PML Update EH state before each unwind action, instead of
|
|
* once at end (vs7#5419)
|
|
* 10-19-99 TGL More P7/Win64 fixes
|
|
* 10-22-99 PML Add EHTRACE support
|
|
* 12-10-99 GB Add Uncaught exception Support by adding a new function
|
|
* __uncaught_exception();
|
|
* 02-15-99 PML Can't put __try/__finally around call to
|
|
* _UnwindNestedFrames (vs7#79460)
|
|
* 03-03-00 GB made __DestructExceptionObject export from dll.
|
|
* 03-21-00 KBF Check for C++ exception in __CxxExceptionFilter
|
|
* 03-22-00 PML Remove CC_P7_SOFT25, which is now on permanently.
|
|
* 03-28-00 GB Check for no buildobj in __CxxExceptionFilter.
|
|
* 04-06-00 GB Added more functions for com+ eh support.
|
|
* 04-19-00 GB ComPlus EH bug fixes.
|
|
* 05-23-00 GB Don't catch BreakPoint generated Exceptions.
|
|
* 05-30-00 GB ComPlus EH bug fixes.
|
|
* 06-08-00 RDL VS#111429: IA64 workaround for AV while handling throw.
|
|
* 06-21-00 GB Fix the difference in order of destruction and
|
|
* construction depending on inlining.
|
|
* 07-26-00 GB Fixed multiple destruction problem in COM+ eh.
|
|
* 08-23-00 GB Fixed problem in BuildCatchObject when called from
|
|
* __CxxExceptionFilter.
|
|
* 02-23-01 PML Add __CxxCallUnwindDtor COM+ wrapper (vs7#217108)
|
|
* 04-09-01 GB Add uncaught_exception support for COM+ C++ App.
|
|
* 04-13-01 GB Fixed problems with Seh and catch(...). (vc7#236286)
|
|
* 04-26-01 GB Fixed a problem with a rethrow without a throw
|
|
* and catch(...)
|
|
* 06-05-01 GB AMD64 Eh support Added.
|
|
* 07-03-01 GB Added __CxxCallUnwindVecDtor for COM+.
|
|
* 07-13-01 GB Rewrite of C++Eh for IA64 and AMD64
|
|
* 07-15-01 PML Remove all ALPHA, MIPS, and PPC code
|
|
* 09-18-01 GB Support for exception specification (Provided by Arturl).
|
|
* 09-20-01 PML Buildfix: EH_MAGIC_NUMBER1_OLD -> EH_MAGIC_NUMBER1,
|
|
* EH_MAGIC_NUMBER1 -> EH_MAGIC_NUMBER2.
|
|
* 09-23-01 GB Rewrite of C++Eh for IA64
|
|
*
|
|
****/
|
|
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <malloc.h>
|
|
|
|
#include <windows.h>
|
|
#include <internal.h>
|
|
#include <mtdll.h> // CRT internal header file
|
|
#include <ehassert.h> // This project's versions of standard assert macros
|
|
#include <ehdata.h> // Declarations of all types used for EH
|
|
#include <ehstate.h> // Declarations of state management stuff
|
|
#include <eh.h> // User-visible routines for eh
|
|
#include <ehhooks.h> // Declarations of hook variables and callbacks
|
|
#include <trnsctrl.h> // Routines to handle transfer of control (trnsctrl.asm)
|
|
#if defined(_M_IA64) /*IFSTRIP=IGN*/
|
|
#include <kxia64.h>
|
|
#include <ia64inst.h>
|
|
#include <cvconst.h>
|
|
#endif
|
|
#include <typeinfo.h>
|
|
|
|
|
|
|
|
|
|
// We define CRTIMP2 to remove dependency on msvcprt.dll.
|
|
#if defined(CRTIMP2)
|
|
#undef CRTIMP2
|
|
#endif
|
|
#define CRTIMP2
|
|
#include <exception> // we need to get unexpected, and std::bad_exception from there
|
|
|
|
#pragma hdrstop // PCH is created from here
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Intel x86-specific definitions
|
|
//
|
|
#if defined(_M_IX86)
|
|
#define __GetRangeOfTrysToCheck(a, b, c, d, e, f, g) \
|
|
_GetRangeOfTrysToCheck(b, c, d, e, f)
|
|
#define __FrameUnwindToEmptyState(a, b, c) \
|
|
__FrameUnwindToState(a, b, c, EH_EMPTY_STATE);
|
|
#define __CallSETranslator(a, b, c, d, e, f, g, h) \
|
|
_CallSETranslator(a, b, c, d, e, f, g)
|
|
#define __GetUnwindState(a, b, c) \
|
|
GetCurrentState(a, b, c)
|
|
#define __OffsetToAddress(a, b, c) \
|
|
OffsetToAddress(a, b)
|
|
#define __GetAddress(a, b) \
|
|
(a)
|
|
#define REAL_FP(a, b) \
|
|
(a)
|
|
#define __ResetException(a)
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// MIPS-specific definitions
|
|
//
|
|
#elif defined(_M_IA64) || defined(_M_AMD64) /*IFSTRIP=IGN*/
|
|
#define __GetRangeOfTrysToCheck(a, b, c, d, e, f, g) \
|
|
_GetRangeOfTrysToCheck(a, b, c, d, e, f, g)
|
|
#define __CallSETranslator(a, b, c, d, e, f, g, h) \
|
|
_CallSETranslator(a, b, c, d, e, f, g)
|
|
#define __GetUnwindState(a, b, c) \
|
|
GetCurrentState(a, b, c)
|
|
#define __OffsetToAddress(a, b, c) \
|
|
OffsetToAddress(a, b)
|
|
#define __GetAddress(a, b) \
|
|
(void*)(a)
|
|
#define REAL_FP(a, b) \
|
|
(a)
|
|
#define __ResetException(a)
|
|
#ifdef _MT
|
|
#define pExitContext (*((CONTEXT **)&(_getptd()->_pExitContext)))
|
|
#define _pForeignExcept (*((EHExceptionRecord **)&(_getptd()->_pForeignException)))
|
|
#else
|
|
static CONTEXT *pExitContext = NULL; // context to assist the return to the continuation point
|
|
EHExceptionRecord *_pForeignExcept = NULL;
|
|
#endif // _MT
|
|
|
|
// The throw site
|
|
#undef CT_PTD
|
|
#define CT_PTD(ct) (CT_PTD_IB(ct, _GetThrowImageBase()))
|
|
#undef CT_COPYFUNC
|
|
#define CT_COPYFUNC(ct) ((ct).copyFunction? CT_COPYFUNC_IB(ct, _GetThrowImageBase()):NULL)
|
|
|
|
#undef THROW_FORWARDCOMPAT
|
|
#define THROW_FORWARDCOMPAT(ti) ((ti).pForwardCompat? THROW_FORWARDCOMPAT_IB(ti, _GetThrowImageBase()):NULL)
|
|
#undef THROW_COUNT
|
|
#define THROW_COUNT(ti) THROW_COUNT_IB(ti, _GetThrowImageBase())
|
|
#undef THROW_CTLIST
|
|
#define THROW_CTLIST(ti) THROW_CTLIST_IB(ti, _GetThrowImageBase())
|
|
|
|
// The catch site
|
|
#undef HT_HANDLER
|
|
#define HT_HANDLER(ht) (HT_HANDLER_IB(ht, _GetImageBase()))
|
|
#undef UWE_ACTION
|
|
#define UWE_ACTION(uwe) ((uwe).action? UWE_ACTION_IB(uwe, _GetImageBase()):NULL)
|
|
|
|
#undef FUNC_UNWIND
|
|
#define FUNC_UNWIND(fi,st) (FUNC_PUNWINDMAP(fi,_GetImageBase())[st])
|
|
#undef TBME_CATCH
|
|
#define TBME_CATCH(hm,n) (TBME_PLIST(hm,_GetImageBase())[n])
|
|
#undef TBME_PCATCH
|
|
#define TBME_PCATCH(hm,n) (&(TBME_PLIST(hm,_GetImageBase())[n]))
|
|
#undef HT_PTD
|
|
#define HT_PTD(ht) ((TypeDescriptor*)((ht).dispType? HT_PTD_IB(ht,_GetImageBase()):NULL))
|
|
|
|
#undef abnormal_termination
|
|
#define abnormal_termination() FALSE
|
|
|
|
#else
|
|
#error Unrecognized platform
|
|
#endif
|
|
|
|
extern "C" {
|
|
typedef struct {
|
|
unsigned long dwSig;
|
|
unsigned long uoffDestination;
|
|
unsigned long dwCode;
|
|
unsigned long uoffFramePointer;
|
|
} _NLG_INFO;
|
|
|
|
extern _NLG_INFO _NLG_Destination;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Forward declaration of local functions:
|
|
//
|
|
|
|
// M00TODO: all these parameters should be declared const
|
|
|
|
// The local unwinder must be external (see __CxxLongjmpUnwind in trnsctrl.cpp)
|
|
|
|
extern "C" void __FrameUnwindToState(
|
|
EHRegistrationNode *,
|
|
DispatcherContext *,
|
|
FuncInfo *,
|
|
__ehstate_t
|
|
);
|
|
|
|
static void FindHandler(
|
|
EHExceptionRecord *,
|
|
EHRegistrationNode *,
|
|
CONTEXT *,
|
|
DispatcherContext *,
|
|
FuncInfo *,
|
|
BOOLEAN,
|
|
int,
|
|
EHRegistrationNode*
|
|
);
|
|
|
|
static void CatchIt(
|
|
EHExceptionRecord *,
|
|
EHRegistrationNode *,
|
|
CONTEXT *,
|
|
DispatcherContext *,
|
|
FuncInfo *,
|
|
HandlerType *,
|
|
CatchableType *,
|
|
TryBlockMapEntry *,
|
|
int,
|
|
EHRegistrationNode *,
|
|
BOOLEAN
|
|
#if defined (_M_AMD64) || defined (_M_IA64)
|
|
, BOOLEAN
|
|
#endif
|
|
);
|
|
|
|
static void * CallCatchBlock(
|
|
EHExceptionRecord *,
|
|
EHRegistrationNode *,
|
|
CONTEXT *,
|
|
FuncInfo *,
|
|
void *,
|
|
int,
|
|
unsigned long
|
|
);
|
|
|
|
static void BuildCatchObject(
|
|
EHExceptionRecord *,
|
|
void *,
|
|
HandlerType *,
|
|
CatchableType *
|
|
);
|
|
|
|
static __inline int TypeMatch(
|
|
HandlerType *,
|
|
CatchableType *,
|
|
ThrowInfo *
|
|
);
|
|
|
|
static void * AdjustPointer(
|
|
void *,
|
|
const PMD&
|
|
);
|
|
|
|
static void FindHandlerForForeignException(
|
|
EHExceptionRecord *,
|
|
EHRegistrationNode *, CONTEXT *,
|
|
DispatcherContext *,
|
|
FuncInfo *,
|
|
__ehstate_t,
|
|
int,
|
|
EHRegistrationNode *
|
|
);
|
|
|
|
static int FrameUnwindFilter(
|
|
EXCEPTION_POINTERS *
|
|
);
|
|
|
|
static int ExFilterRethrow(
|
|
EXCEPTION_POINTERS *
|
|
#if defined(_M_AMD64) || defined(_M_IA64)
|
|
,EHExceptionRecord *,
|
|
int *
|
|
#endif
|
|
);
|
|
|
|
extern "C" void _CRTIMP __DestructExceptionObject(
|
|
EHExceptionRecord *,
|
|
BOOLEAN
|
|
);
|
|
|
|
static BOOLEAN IsInExceptionSpec(
|
|
EHExceptionRecord *pExcept, // Information for this (logical)
|
|
// exception
|
|
ESTypeList *pFuncInfo // Static information for subject frame
|
|
);
|
|
static void CallUnexpected(ESTypeList* pESTypeList);
|
|
static BOOLEAN Is_bad_exception_allowed(ESTypeList *pExceptionSpec);
|
|
|
|
//
|
|
// Make sure the terminate wrapper is dragged in:
|
|
//
|
|
static void *pMyUnhandledExceptionFilter =
|
|
&__CxxUnhandledExceptionFilter;
|
|
|
|
//
|
|
// This describes the most recently handled exception, in case of a rethrow:
|
|
//
|
|
#ifdef _MT
|
|
#define _pCurrentException (*((EHExceptionRecord **)&(_getptd()->_curexception)))
|
|
#define _pCurrentExContext (*((CONTEXT **)&(_getptd()->_curcontext)))
|
|
#define __ProcessingThrow _getptd()->_ProcessingThrow
|
|
#define _pCurrentFuncInfo (*((ESTypeList **)&(_getptd()->_curexcspec)))
|
|
#else
|
|
EHExceptionRecord *_pCurrentException = NULL;
|
|
CONTEXT *_pCurrentExContext = NULL;
|
|
int __ProcessingThrow = 0;
|
|
ESTypeList *_pCurrentFuncInfo = NULL;
|
|
#endif
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// __InternalCxxFrameHandler - the frame handler for all functions with C++ EH
|
|
// information.
|
|
//
|
|
// If exception is handled, this doesn't return; otherwise, it returns
|
|
// ExceptionContinueSearch.
|
|
//
|
|
// Note that this is called three ways:
|
|
// From __CxxFrameHandler: primary usage, called to inspect whole function.
|
|
// CatchDepth == 0, pMarkerRN == NULL
|
|
// From CatchGuardHandler: If an exception occurred within a catch, this is
|
|
// called to check for try blocks within that catch only, and does not
|
|
// handle unwinds.
|
|
// From TranslatorGuardHandler: Called to handle the translation of a
|
|
// non-C++ EH exception. Context considered is that of parent.
|
|
|
|
extern "C" EXCEPTION_DISPOSITION __cdecl __InternalCxxFrameHandler(
|
|
EHExceptionRecord *pExcept, // Information for this exception
|
|
EHRegistrationNode *pRN, // Dynamic information for this frame
|
|
CONTEXT *pContext, // Context info
|
|
DispatcherContext *pDC, // Context within subject 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
|
|
BOOLEAN recursive // Are we handling a translation?
|
|
) {
|
|
EHTRACE_ENTER_FMT2("%s, pRN = 0x%p",
|
|
IS_UNWINDING(PER_FLAGS(pExcept)) ? "Unwinding" : "Searching",
|
|
pRN);
|
|
|
|
DASSERT(FUNC_MAGICNUM(*pFuncInfo) == EH_MAGIC_NUMBER1
|
|
|| FUNC_MAGICNUM(*pFuncInfo) == EH_MAGIC_NUMBER2);
|
|
|
|
if (IS_UNWINDING(PER_FLAGS(pExcept)))
|
|
{
|
|
// We're at the unwinding stage of things. Don't care about the
|
|
// exception itself. (Check this first because it's easier)
|
|
|
|
if (FUNC_MAXSTATE(*pFuncInfo) != 0 && CatchDepth == 0)
|
|
{
|
|
// Only unwind if there's something to unwind
|
|
// AND we're being called through the primary RN.
|
|
|
|
#if defined(_M_IA64) || defined(_M_AMD64) /*IFSTRIP=IGN*/
|
|
|
|
if (IS_TARGET_UNWIND(PER_FLAGS(pExcept)) && PER_CODE(pExcept) == STATUS_LONGJUMP) {
|
|
__ehstate_t target_state = __StateFromIp(pFuncInfo,
|
|
pDC,
|
|
#if defined(_M_IA64)
|
|
pContext->StIIP
|
|
#elif defined(_M_AMD64)
|
|
pContext->Rip
|
|
#endif
|
|
);
|
|
|
|
DASSERT(target_state >= EH_EMPTY_STATE
|
|
&& target_state < FUNC_MAXSTATE(*pFuncInfo));
|
|
|
|
__FrameUnwindToState(pRN, pDC, pFuncInfo, target_state);
|
|
EHTRACE_HANDLER_EXIT(ExceptionContinueSearch);
|
|
return ExceptionContinueSearch;
|
|
} else if(IS_TARGET_UNWIND(PER_FLAGS(pExcept)) &&
|
|
PER_CODE(pExcept) == STATUS_UNWIND_CONSOLIDATE)
|
|
{
|
|
PEXCEPTION_RECORD pSehExcept = (PEXCEPTION_RECORD)pExcept;
|
|
__ehstate_t target_state = (__ehstate_t)pSehExcept->ExceptionInformation[3];
|
|
|
|
DASSERT(target_state >= EH_EMPTY_STATE
|
|
&& target_state < FUNC_MAXSTATE(*pFuncInfo));
|
|
__FrameUnwindToState((EHRegistrationNode *)pSehExcept->ExceptionInformation[1], pDC, pFuncInfo, target_state);
|
|
EHTRACE_HANDLER_EXIT(ExceptionContinueSearch);
|
|
return ExceptionContinueSearch;
|
|
}
|
|
#endif // defined(_M_IA64)
|
|
if (!(PER_FLAGS(pExcept) & 0x40)) {
|
|
__FrameUnwindToEmptyState(pRN, pDC, pFuncInfo);
|
|
}
|
|
}
|
|
EHTRACE_HANDLER_EXIT(ExceptionContinueSearch);
|
|
return ExceptionContinueSearch; // I don't think this value matters
|
|
|
|
} else if (FUNC_NTRYBLOCKS(*pFuncInfo) != 0
|
|
//
|
|
// If the function has no try block, we still want to call the
|
|
// frame handler if there is an exception specification
|
|
//
|
|
|| FUNC_MAGICNUM(*pFuncInfo) >= EH_MAGIC_NUMBER2 ) {
|
|
|
|
// NT is looking for handlers. We've got handlers.
|
|
// Let's check this puppy out. Do we recognize it?
|
|
|
|
int (__cdecl *pfn)(...);
|
|
|
|
if (PER_CODE(pExcept) == EH_EXCEPTION_NUMBER
|
|
&& PER_MAGICNUM(pExcept) > EH_MAGIC_NUMBER2
|
|
&& (pfn = THROW_FORWARDCOMPAT(*PER_PTHROW(pExcept))) != NULL) {
|
|
|
|
// Forward compatibility: The thrown object appears to have been
|
|
// created by a newer version of our compiler. Let that version's
|
|
// frame handler do the work (if one was specified).
|
|
|
|
#if defined(DEBUG)
|
|
if (_ValidateExecute((FARPROC)pfn)) {
|
|
#endif
|
|
EXCEPTION_DISPOSITION result =
|
|
(EXCEPTION_DISPOSITION)pfn(pExcept, pRN, pContext, pDC,
|
|
pFuncInfo, CatchDepth,
|
|
pMarkerRN, recursive);
|
|
EHTRACE_HANDLER_EXIT(result);
|
|
return result;
|
|
#if defined(DEBUG)
|
|
} else {
|
|
_inconsistency(); // Does not return; TKB
|
|
}
|
|
#endif
|
|
|
|
} else {
|
|
|
|
// Anything else: we'll handle it here.
|
|
FindHandler(pExcept, pRN, pContext, pDC, pFuncInfo, recursive,
|
|
CatchDepth, pMarkerRN);
|
|
}
|
|
|
|
// If it returned, we didn't have any matches.
|
|
|
|
} // NT was looking for a handler
|
|
|
|
// We had nothing to do with it or it was rethrown. Keep searching.
|
|
EHTRACE_HANDLER_EXIT(ExceptionContinueSearch);
|
|
return ExceptionContinueSearch;
|
|
|
|
} // InternalCxxFrameHandler
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// FindHandler - find a matching handler on this frame, using all means
|
|
// available.
|
|
//
|
|
// Description:
|
|
// If the exception thrown was an MSC++ EH, search handlers for match.
|
|
// Otherwise, if we haven't already recursed, try to translate.
|
|
// If we have recursed (ie we're handling the translator's exception), and
|
|
// it isn't a typed exception, call _inconsistency.
|
|
//
|
|
// Returns:
|
|
// Returns iff exception was not handled.
|
|
//
|
|
// Assumptions:
|
|
// Only called if there are handlers in this function.
|
|
|
|
static void FindHandler(
|
|
EHExceptionRecord *pExcept, // Information for this (logical)
|
|
// exception
|
|
EHRegistrationNode *pRN, // Dynamic information for subject frame
|
|
CONTEXT *pContext, // Context info
|
|
DispatcherContext *pDC, // Context within subject frame
|
|
FuncInfo *pFuncInfo, // Static information for subject frame
|
|
BOOLEAN recursive, // TRUE if we're handling the
|
|
// translation
|
|
int CatchDepth, // Level of nested catch that is being
|
|
// checked
|
|
EHRegistrationNode *pMarkerRN // Extra marker RN for nested catch
|
|
// handling
|
|
)
|
|
{
|
|
EHTRACE_ENTER;
|
|
|
|
BOOLEAN IsRethrow = FALSE;
|
|
BOOLEAN gotMatch = FALSE;
|
|
|
|
// Get the current state (machine-dependent)
|
|
#if defined(_M_IA64) || defined(_M_AMD64) /*IFSTRIP=IGN*/
|
|
__ehstate_t curState = __StateFromControlPc(pFuncInfo, pDC);
|
|
EHRegistrationNode EstablisherFrame;
|
|
_GetEstablisherFrame(pRN, pDC, pFuncInfo, &EstablisherFrame);
|
|
if (curState > __GetUnwindTryBlock(pRN, pDC, pFuncInfo)) {
|
|
__SetState(&EstablisherFrame, pDC, pFuncInfo, curState);
|
|
__SetUnwindTryBlock(pRN, pDC, pFuncInfo, /*curTry*/ curState);
|
|
} else {
|
|
curState = __GetUnwindTryBlock(pRN, pDC, pFuncInfo);
|
|
}
|
|
#else
|
|
__ehstate_t curState = GetCurrentState(pRN, pDC, pFuncInfo);
|
|
#endif
|
|
DASSERT(curState >= EH_EMPTY_STATE && curState < FUNC_MAXSTATE(*pFuncInfo));
|
|
|
|
// Check if it's a re-throw. Use the exception we stashed away if it is.
|
|
if (PER_IS_MSVC_EH(pExcept) && PER_PTHROW(pExcept) == NULL) {
|
|
|
|
if (_pCurrentException == NULL) {
|
|
// Oops! User re-threw a non-existant exception! Let it propogate.
|
|
EHTRACE_EXIT;
|
|
return;
|
|
}
|
|
|
|
pExcept = _pCurrentException;
|
|
pContext = _pCurrentExContext;
|
|
IsRethrow = TRUE;
|
|
#if defined(_M_IA64) || defined(_M_AMD64)/*IFSTRIP=IGN*/
|
|
_SetThrowImageBase((unsigned __int64)pExcept->params.pThrowImageBase);
|
|
#endif
|
|
|
|
DASSERT(_ValidateRead(pExcept));
|
|
DASSERT(!PER_IS_MSVC_EH(pExcept) || PER_PTHROW(pExcept) != NULL);
|
|
|
|
//
|
|
// We know it is a rethrow -- did we come here as a result of an
|
|
// exception re-thrown from CallUnexpected() ?
|
|
//
|
|
if( _pCurrentFuncInfo != NULL )
|
|
{
|
|
ESTypeList* pCurrentFuncInfo = _pCurrentFuncInfo; // remember it in a local variable
|
|
_pCurrentFuncInfo = NULL; // and reset it immediately -- so we don't forget to do it later
|
|
|
|
// Does the exception thrown by CallUnexpected belong to the exception specification?
|
|
|
|
if( IsInExceptionSpec(pExcept, pCurrentFuncInfo) )
|
|
{
|
|
// Yes it does -- so "continue the search for another handler at the call of the function
|
|
// whose exception-specification was violated"
|
|
;
|
|
}
|
|
else
|
|
{
|
|
// Nope, it does not. Is std::bad_exception allowed by the spec?
|
|
|
|
if( Is_bad_exception_allowed(pCurrentFuncInfo) )
|
|
{
|
|
// yup -- so according to the standard, we need to replace the thrown
|
|
// exception by an implementation-defined object of the type std::bad_exception
|
|
// and continue the search for another handler at the call of the function
|
|
// whose exception-specification was violated.
|
|
|
|
// Just throw bad_exception -- we will then come into FindHandler for the third time --
|
|
// but make sure we will not get here again
|
|
|
|
__DestructExceptionObject(pExcept, TRUE); // destroy the original object
|
|
|
|
throw std::bad_exception();
|
|
}
|
|
else
|
|
{
|
|
terminate();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (PER_IS_MSVC_EH(pExcept)) {
|
|
// Looks like it's ours. Let's see if we have a match:
|
|
//
|
|
// First, determine range of try blocks to consider:
|
|
// Only try blocks which are at the current catch depth are of interest.
|
|
|
|
unsigned curTry;
|
|
unsigned end;
|
|
|
|
if( FUNC_NTRYBLOCKS(*pFuncInfo) > 0 )
|
|
{
|
|
TryBlockMapEntry *pEntry = __GetRangeOfTrysToCheck(pRN,
|
|
pFuncInfo,
|
|
CatchDepth,
|
|
curState,
|
|
&curTry,
|
|
&end,
|
|
pDC);
|
|
|
|
// Scan the try blocks in the function:
|
|
for (; curTry < end; curTry++, pEntry++) {
|
|
HandlerType *pCatch;
|
|
#if defined(_M_IA64) || defined(_M_AMD64)
|
|
__int32 const *ppCatchable;
|
|
#else
|
|
CatchableType * const *ppCatchable;
|
|
#endif
|
|
CatchableType *pCatchable;
|
|
int catches;
|
|
int catchables;
|
|
|
|
if (TBME_LOW(*pEntry) > curState || curState > TBME_HIGH(*pEntry)) {
|
|
continue;
|
|
}
|
|
|
|
// Try block was in scope for current state. Scan catches for this
|
|
// try:
|
|
pCatch = TBME_PCATCH(*pEntry, 0);
|
|
for (catches = TBME_NCATCHES(*pEntry); catches > 0; catches--,
|
|
pCatch++) {
|
|
|
|
// Scan all types that thrown object can be converted to:
|
|
ppCatchable = THROW_CTLIST(*PER_PTHROW(pExcept));
|
|
for (catchables = THROW_COUNT(*PER_PTHROW(pExcept));
|
|
catchables > 0; catchables--, ppCatchable++) {
|
|
|
|
#if defined(_M_IA64) || defined(_M_AMD64)
|
|
pCatchable = (CatchableType *)(_GetThrowImageBase() + *ppCatchable);
|
|
#else
|
|
pCatchable = *ppCatchable;
|
|
#endif
|
|
|
|
if (!TypeMatch(pCatch, pCatchable, PER_PTHROW(pExcept))) {
|
|
continue;
|
|
}
|
|
|
|
// OK. We finally found a match. Activate the catch. If
|
|
// control gets back here, the catch did a re-throw, so
|
|
// keep searching.
|
|
|
|
gotMatch = TRUE;
|
|
|
|
CatchIt(pExcept,
|
|
pRN,
|
|
pContext,
|
|
pDC,
|
|
pFuncInfo,
|
|
pCatch,
|
|
pCatchable,
|
|
pEntry,
|
|
CatchDepth,
|
|
pMarkerRN,
|
|
IsRethrow
|
|
#if defined(_M_IA64) || defined (_M_AMD64)
|
|
, recursive
|
|
#endif
|
|
);
|
|
goto NextTryBlock;
|
|
|
|
} // Scan posible conversions
|
|
} // Scan catch clauses
|
|
NextTryBlock: ;
|
|
} // Scan try blocks
|
|
} // if FUNC_NTRYBLOCKS( pFuncInfo ) > 0
|
|
#if defined(DEBUG)
|
|
else
|
|
{
|
|
//
|
|
// This can only happen if the function has an exception specification
|
|
// but no try/catch blocks
|
|
//
|
|
DASSERT( FUNC_MAGICNUM(*pFuncInfo) >= EH_MAGIC_NUMBER2 );
|
|
DASSERT( FUNC_PESTYPES(pFuncInfo) != NULL );
|
|
}
|
|
#endif
|
|
|
|
if (recursive) {
|
|
// A translation was provided, but this frame didn't catch it.
|
|
// Destruct the translated object before returning; if destruction
|
|
// raises an exception, issue _inconsistency.
|
|
__DestructExceptionObject(pExcept, TRUE);
|
|
}
|
|
|
|
//
|
|
// We haven't found the match -- let's look at the exception spec and see if our try
|
|
// matches one of the listed types.
|
|
//
|
|
if( !gotMatch && FUNC_MAGICNUM(*pFuncInfo) >= EH_MAGIC_HAS_ES && FUNC_PESTYPES(pFuncInfo) != NULL )
|
|
{
|
|
if( !IsInExceptionSpec(pExcept, FUNC_PESTYPES(pFuncInfo)) )
|
|
{
|
|
// Nope, it does not. Call unexpected
|
|
|
|
//
|
|
// We must unwind the stack before calling unexpected -- this makes it work
|
|
// as if it were inside catch(...) clause
|
|
//
|
|
#if defined(_M_IA64) || defined (_M_AMD64)/*IFSTRIP=IGN*/
|
|
EHRegistrationNode *pEstablisher = pRN;
|
|
EHRegistrationNode EstablisherFramePointers;
|
|
pEstablisher = _GetEstablisherFrame(pRN, pDC, pFuncInfo, &EstablisherFramePointers);
|
|
PVOID pExceptionObjectDestroyed = NULL;
|
|
CONTEXT ExitContext;
|
|
pExitContext = &ExitContext;
|
|
_UnwindNestedFrames(pRN,
|
|
pExcept,
|
|
pContext,
|
|
pEstablisher,
|
|
NULL,
|
|
-1,
|
|
pFuncInfo,
|
|
pDC,
|
|
recursive
|
|
);
|
|
#else
|
|
EHExceptionRecord *pSaveException = _pCurrentException;
|
|
CONTEXT *pSaveExContext = _pCurrentExContext;
|
|
|
|
_pCurrentException = pExcept;
|
|
_pCurrentExContext = pContext;
|
|
|
|
if (pMarkerRN == NULL) {
|
|
_UnwindNestedFrames(pRN, pExcept);
|
|
} else {
|
|
_UnwindNestedFrames(pMarkerRN, pExcept);
|
|
}
|
|
__FrameUnwindToEmptyState(pRN, pDC, pFuncInfo);
|
|
|
|
CallUnexpected(FUNC_PESTYPES(pFuncInfo));
|
|
_pCurrentException = pExcept;
|
|
_pCurrentExContext = pContext;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
} // It was a C++ EH exception
|
|
else {
|
|
// Not ours. But maybe someone told us how to make it ours.
|
|
if( FUNC_NTRYBLOCKS(*pFuncInfo) > 0 ) {
|
|
if (!recursive) {
|
|
FindHandlerForForeignException(pExcept, pRN, pContext, pDC,
|
|
pFuncInfo, curState, CatchDepth, pMarkerRN);
|
|
} else {
|
|
// We're recursive, and the exception wasn't a C++ EH!
|
|
// Translator threw something uninteligable. We're outa here!
|
|
|
|
// M00REVIEW: Two choices here actually: we could let the new
|
|
// exception take over.
|
|
|
|
terminate();
|
|
}
|
|
}
|
|
} // It wasn't our exception
|
|
|
|
DASSERT( _pCurrentFuncInfo == NULL ); // never leave it initialized with something
|
|
|
|
EHTRACE_EXIT;
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// FindHandlerForForeignException - We've got an exception which wasn't ours.
|
|
// Try to translate it into C++ EH, and also check for match with ellipsis.
|
|
//
|
|
// Description:
|
|
// If an SE-to-EH translator has been installed, call it. The translator
|
|
// must throw the appropriate typed exception or return. If the translator
|
|
// throws, we invoke FindHandler again as the exception filter.
|
|
//
|
|
// Returns:
|
|
// Returns if exception was not fully handled.
|
|
// No return value.
|
|
//
|
|
// Assumptions:
|
|
// Only called if there are handlers in this function.
|
|
|
|
static void FindHandlerForForeignException(
|
|
EHExceptionRecord *pExcept, // Information for this (logical)
|
|
// exception
|
|
EHRegistrationNode *pRN, // Dynamic information for subject frame
|
|
CONTEXT *pContext, // Context info
|
|
DispatcherContext *pDC, // Context within subject frame
|
|
FuncInfo *pFuncInfo, // Static information for subject frame
|
|
__ehstate_t curState, // Current state
|
|
int CatchDepth, // Level of nested catch that is being
|
|
// checked
|
|
EHRegistrationNode *pMarkerRN // Extra marker RN for nested catch
|
|
// handling
|
|
)
|
|
{
|
|
EHTRACE_ENTER;
|
|
|
|
unsigned curTry;
|
|
unsigned end;
|
|
TryBlockMapEntry *pEntry;
|
|
// We don't want to touch BreakPoint generated Exception.
|
|
if (PER_CODE(pExcept) == STATUS_BREAKPOINT) {
|
|
EHTRACE_EXIT;
|
|
return;
|
|
}
|
|
|
|
if (__pSETranslator != NULL) {
|
|
|
|
// Call the translator. If the translator knows what to
|
|
// make of it, it will throw an appropriate C++ exception.
|
|
// We intercept it and use it (recursively) for this
|
|
// frame. Don't recurse more than once.
|
|
|
|
if (__CallSETranslator(pExcept, pRN, pContext, pDC, pFuncInfo,
|
|
CatchDepth, pMarkerRN, TDTransOffset)) {
|
|
EHTRACE_EXIT;
|
|
return;
|
|
}
|
|
}
|
|
|
|
DASSERT( FUNC_NTRYBLOCKS(*pFuncInfo) != 0 );
|
|
|
|
// Didn't have a translator, or the translator returned normally (i.e.
|
|
// didn't translate it). Still need to check for match with ellipsis:
|
|
pEntry = __GetRangeOfTrysToCheck(pRN, pFuncInfo, CatchDepth, curState,
|
|
&curTry, &end, pDC);
|
|
|
|
// Scan the try blocks in the function:
|
|
for (; curTry < end; curTry++, pEntry++) {
|
|
|
|
// If the try-block was in scope *and* the last catch in that try is an
|
|
// ellipsis (no other can be)
|
|
if (curState < TBME_LOW(*pEntry) || curState > TBME_HIGH(*pEntry)
|
|
|| !HT_IS_TYPE_ELLIPSIS(TBME_CATCH(*pEntry, TBME_NCATCHES(*pEntry) - 1))) {
|
|
continue;
|
|
}
|
|
|
|
// Found an ellipsis. Handle exception.
|
|
|
|
CatchIt(pExcept,
|
|
pRN,
|
|
pContext,
|
|
pDC,
|
|
pFuncInfo,
|
|
TBME_PCATCH(*pEntry, TBME_NCATCHES(*pEntry) - 1),
|
|
NULL,
|
|
pEntry,
|
|
CatchDepth,
|
|
pMarkerRN,
|
|
TRUE
|
|
#if defined(_M_IA64) || defined(_M_AMD64)
|
|
,FALSE
|
|
#endif
|
|
);
|
|
|
|
// If it returns, handler re-threw. Keep searching.
|
|
|
|
} // Search for try
|
|
|
|
EHTRACE_EXIT;
|
|
|
|
// If we got here, that means we didn't have anything to do with the
|
|
// exception. Continue search.
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// TypeMatch - Check if the catch type matches the given throw conversion.
|
|
//
|
|
// Returns:
|
|
// TRUE if the catch can catch using this throw conversion, FALSE otherwise.
|
|
|
|
static __inline int TypeMatch(
|
|
HandlerType *pCatch, // Type of the 'catch' clause
|
|
CatchableType *pCatchable, // Type conversion under consideration
|
|
ThrowInfo *pThrow // General information about the thrown
|
|
// type.
|
|
) {
|
|
// First, check for match with ellipsis:
|
|
if (HT_IS_TYPE_ELLIPSIS(*pCatch)) {
|
|
return TRUE;
|
|
}
|
|
|
|
// Not ellipsis; the basic types match if it's the same record *or* the
|
|
// names are identical.
|
|
if (HT_PTD(*pCatch) != CT_PTD(*pCatchable)
|
|
&& strcmp(HT_NAME(*pCatch), CT_NAME(*pCatchable)) != 0) {
|
|
return FALSE;
|
|
}
|
|
|
|
// Basic types match. The actual conversion is valid if:
|
|
// caught by ref if ref required *and*
|
|
// the qualifiers are compatible *and*
|
|
// the alignments match *and*
|
|
// the volatility matches
|
|
|
|
return (!CT_BYREFONLY(*pCatchable) || HT_ISREFERENCE(*pCatch))
|
|
&& (!THROW_ISCONST(*pThrow) || HT_ISCONST(*pCatch))
|
|
#if defined(_M_IA64) || defined(_M_AMD64) /*IFSTRIP=IGN*/
|
|
&& (!THROW_ISUNALIGNED(*pThrow) || HT_ISUNALIGNED(*pCatch))
|
|
#endif
|
|
&& (!THROW_ISVOLATILE(*pThrow) || HT_ISVOLATILE(*pCatch));
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// FrameUnwindFilter - Allows possibility of continuing through SEH during
|
|
// unwind.
|
|
//
|
|
|
|
static int FrameUnwindFilter(
|
|
EXCEPTION_POINTERS *pExPtrs
|
|
) {
|
|
EHTRACE_ENTER;
|
|
|
|
EHExceptionRecord *pExcept = (EHExceptionRecord *)pExPtrs->ExceptionRecord;
|
|
|
|
switch (PER_CODE(pExcept)) {
|
|
case EH_EXCEPTION_NUMBER:
|
|
__ProcessingThrow = 0;
|
|
terminate();
|
|
|
|
#ifdef ALLOW_UNWIND_ABORT
|
|
case EH_ABORT_FRAME_UNWIND_PART:
|
|
EHTRACE_EXIT;
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
#endif
|
|
|
|
default:
|
|
EHTRACE_EXIT;
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
}
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// __FrameUnwindToState - Unwind this frame until specified state is reached.
|
|
//
|
|
// Returns:
|
|
// No return value.
|
|
//
|
|
// Side Effects:
|
|
// All objects on frame which go out of scope as a result of the unwind are
|
|
// destructed.
|
|
// Registration node is updated to reflect new state.
|
|
//
|
|
// Usage:
|
|
// This function is called both to do full-frame unwind during the unwind
|
|
// phase (targetState = -1), and to do partial unwinding when the current
|
|
// frame has an appropriate catch.
|
|
|
|
extern "C" void __FrameUnwindToState (
|
|
EHRegistrationNode *pRN, // Registration node for subject
|
|
// function
|
|
DispatcherContext *pDC, // Context within subject frame
|
|
FuncInfo *pFuncInfo, // Static information for subject
|
|
// function
|
|
__ehstate_t targetState // State to unwind to
|
|
) {
|
|
EHTRACE_ENTER;
|
|
|
|
#if defined(_M_AMD64) || defined(_M_IA64)
|
|
__ehstate_t curState = __GetCurrentState(pRN, pDC, pFuncInfo);
|
|
#else
|
|
__ehstate_t curState = __GetUnwindState(pRN, pDC, pFuncInfo);
|
|
#endif
|
|
__ProcessingThrow++;
|
|
__try {
|
|
#if defined(_M_IA64) || defined(_M_AMD64)
|
|
while (curState != EH_EMPTY_STATE && curState > targetState)
|
|
#else
|
|
while (curState != targetState)
|
|
#endif
|
|
{
|
|
DASSERT((curState > EH_EMPTY_STATE)
|
|
&& (curState < FUNC_MAXSTATE(*pFuncInfo)));
|
|
|
|
// Get state after next unwind action
|
|
__ehstate_t nxtState = UWE_TOSTATE(FUNC_UNWIND(*pFuncInfo, curState));
|
|
|
|
__try {
|
|
// Call the unwind action (if one exists):
|
|
|
|
if (UWE_ACTION(FUNC_UNWIND(*pFuncInfo, curState)) != NULL) {
|
|
|
|
// Before calling unwind action, adjust state as if it were
|
|
// already completed:
|
|
#if defined(_M_AMD64) || defined (_M_IA64)
|
|
__SetState(pRN, pDC, pFuncInfo, nxtState);
|
|
#else
|
|
SetState(pRN, pDC, pFuncInfo, nxtState);
|
|
#endif
|
|
|
|
EHTRACE_FMT2("Unwind from state %d to state %d", curState, nxtState);
|
|
_CallSettingFrame(__GetAddress(UWE_ACTION(FUNC_UNWIND(*pFuncInfo, curState)),
|
|
pDC),
|
|
REAL_FP(pRN, pFuncInfo),
|
|
0x103);
|
|
}
|
|
|
|
} __except(EHTRACE_EXCEPT(FrameUnwindFilter(exception_info()))) {
|
|
}
|
|
|
|
curState = nxtState;
|
|
}
|
|
} __finally {
|
|
if (__ProcessingThrow > 0) {
|
|
__ProcessingThrow--;
|
|
}
|
|
}
|
|
|
|
|
|
// Now that we're done, set the frame to reflect the final state.
|
|
|
|
#if defined(_M_IA64) || defined(_M_AMD64)
|
|
DASSERT(curState == EH_EMPTY_STATE || curState <= targetState);
|
|
#else
|
|
DASSERT(curState == targetState);
|
|
#endif
|
|
|
|
EHTRACE_FMT2("Move from state %d to state %d", __GetUnwindState(pRN, pDC, pFuncInfo), curState);
|
|
#if defined(_M_IA64) || defined(_M_AMD64)
|
|
__SetState(pRN, pDC, pFuncInfo, curState);
|
|
#else
|
|
SetState(pRN, pDC, pFuncInfo, curState);
|
|
#endif
|
|
|
|
EHTRACE_EXIT;
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// CatchIt - A handler has been found for the thrown type. Do the work to
|
|
// transfer control.
|
|
//
|
|
// Description:
|
|
// Builds the catch object
|
|
// Unwinds the stack to the point of the try
|
|
// Calls the address of the handler (funclet) with the frame set up for that
|
|
// function but without resetting the stack.
|
|
// Handler funclet returns address to continue execution, or NULL if the
|
|
// handler re-threw ("throw;" lexically in handler)
|
|
// If the handler throws an EH exception whose exception info is NULL, then
|
|
// it's a re-throw from a dynamicly enclosed scope.
|
|
//
|
|
// M00REVIEW: It is still an open question whether the catch object is built
|
|
// before or after the local unwind.
|
|
//
|
|
// Returns:
|
|
// No return value. Returns iff handler re-throws.
|
|
static void CatchIt(
|
|
EHExceptionRecord *pExcept, // The exception thrown
|
|
EHRegistrationNode *pRN, // Dynamic info of function with catch
|
|
CONTEXT *pContext, // Context info
|
|
DispatcherContext *pDC, // Context within subject frame
|
|
FuncInfo *pFuncInfo, // Static info of function with catch
|
|
HandlerType *pCatch, // The catch clause selected
|
|
CatchableType *pConv, // The rules for making the conversion
|
|
TryBlockMapEntry *pEntry, // Description of the try block
|
|
int CatchDepth, // How many catches are we nested in?
|
|
EHRegistrationNode *pMarkerRN, // Special node if nested in catch
|
|
BOOLEAN IsRethrow // Is this a rethrow ?
|
|
#if defined(_M_IA64) || defined(_M_AMD64) /*IFSTRIP=IGN*/
|
|
, BOOLEAN recursive
|
|
#endif // defined(_POWERPC)
|
|
) {
|
|
EHTRACE_ENTER_FMT1("Catching object @ 0x%p", PER_PEXCEPTOBJ(pExcept));
|
|
|
|
EHRegistrationNode *pEstablisher = pRN;
|
|
|
|
#if defined(_M_IA64) || defined(_M_AMD64) /*IFSTRIP=IGN*/
|
|
EHRegistrationNode EstablisherFramePointers;
|
|
pEstablisher = _GetEstablisherFrame(pRN, pDC, pFuncInfo, &EstablisherFramePointers);
|
|
#else
|
|
void *continuationAddress;
|
|
#endif // defined(_POWERPC)
|
|
|
|
// Copy the thrown object into a buffer in the handler's stack frame,
|
|
// unless the catch was by elipsis (no conversion) OR the catch was by
|
|
// type without an actual 'catch object'.
|
|
|
|
if (pConv != NULL) {
|
|
BuildCatchObject(pExcept, pEstablisher, pCatch, pConv);
|
|
}
|
|
|
|
// Unwind stack objects to the entry of the try that caught this exception.
|
|
|
|
#if defined(_M_IA64) || defined(_M_AMD64)/*IFSTRIP=IGN*/
|
|
// This call will never return. This call will end up calling CxxCallCatchBlock
|
|
// through RtlUnwind (STATUS_CONSULIDATE_FRAMES) mechanism.
|
|
_UnwindNestedFrames(pRN,
|
|
pExcept,
|
|
pContext,
|
|
pEstablisher,
|
|
__GetAddress(HT_HANDLER(*pCatch), pDC),
|
|
TBME_LOW(*pEntry),
|
|
pFuncInfo,
|
|
pDC,
|
|
recursive
|
|
);
|
|
#else
|
|
if (pMarkerRN == NULL) {
|
|
_UnwindNestedFrames(pRN, pExcept);
|
|
} else {
|
|
_UnwindNestedFrames(pMarkerRN, pExcept);
|
|
}
|
|
|
|
__FrameUnwindToState(pEstablisher, pDC, pFuncInfo, TBME_LOW(*pEntry));
|
|
|
|
// Call the catch. Separated out because it introduces a new registration
|
|
// node.
|
|
|
|
EHTRACE_FMT2("Move from state %d to state %d", __GetUnwindState(pRN, pDC, pFuncInfo), TBME_HIGH(*pEntry) + 1);
|
|
SetState(pRN, pDC, pFuncInfo, TBME_HIGH(*pEntry) + 1);
|
|
|
|
continuationAddress = CallCatchBlock(pExcept,
|
|
pEstablisher,
|
|
pContext,
|
|
pFuncInfo,
|
|
__GetAddress(HT_HANDLER(*pCatch), pDC),
|
|
CatchDepth,
|
|
0x100);
|
|
|
|
// Transfer control to the continuation address. If no continuation then
|
|
// it's a re-throw, so return.
|
|
|
|
if (continuationAddress != NULL) {
|
|
|
|
_JumpToContinuation(continuationAddress, pRN);
|
|
// No return.
|
|
|
|
}
|
|
EHTRACE_EXIT;
|
|
#endif
|
|
}
|
|
|
|
#if defined(_M_AMD64) || defined(_M_IA64)
|
|
|
|
|
|
static void __RethrowException(EHExceptionRecord *pThisException)
|
|
{
|
|
RaiseException( pThisException->ExceptionCode,
|
|
pThisException->ExceptionFlags,
|
|
pThisException->NumberParameters,
|
|
(PULONG_PTR)&(pThisException->params) );
|
|
}
|
|
|
|
extern "C" void *__CxxCallCatchBlock(
|
|
EXCEPTION_RECORD *pExcept
|
|
)
|
|
{
|
|
int rethrow = 0, TranslatedCatch = 0;
|
|
void *handlerAddress;
|
|
void *continuationAddress = NULL;
|
|
FuncInfo *pFuncInfo;
|
|
FRAMEINFO FrameInfo;
|
|
CONTEXT *pContext, *pSaveContext;
|
|
EHRegistrationNode *pEstablisherFrame;
|
|
EHExceptionRecord *pThisException, *pSaveException, *pForeignException = NULL;
|
|
|
|
pSaveContext = _pCurrentExContext;
|
|
pSaveException = _pCurrentException;
|
|
|
|
// Copy Necessary Information which is passed from UnwindNestedFrames.
|
|
pThisException = (EHExceptionRecord *) pExcept->ExceptionInformation[6];
|
|
pFuncInfo = (FuncInfo *) pExcept->ExceptionInformation[5];
|
|
pContext = (CONTEXT *) pExcept->ExceptionInformation[4];
|
|
handlerAddress = (void *) pExcept->ExceptionInformation[2];
|
|
pEstablisherFrame = (EHRegistrationNode *)pExcept->ExceptionInformation[1];
|
|
|
|
_pCurrentException = pThisException;
|
|
_pCurrentExContext = pContext;
|
|
FRAMEINFO *pFrameInfo = _CreateFrameInfo(&FrameInfo,
|
|
(void *)PER_PEXCEPTOBJ(_pCurrentException));
|
|
|
|
if (pExcept->ExceptionInformation[7]) {
|
|
// Stuff for SehTralation book keeping
|
|
// This Exception Object is Translation of Froigen Exception And should
|
|
// be destroyed in any case. If there is rethrow, throw ForeignException.
|
|
// IMPRORTANT: One one else can rethrow this Exception Object.
|
|
TranslatedCatch = 1;
|
|
pForeignException = _pForeignExcept;
|
|
_pCurrentException = pForeignException;
|
|
// End Translation Stuff
|
|
}
|
|
|
|
__try {
|
|
__try{
|
|
continuationAddress = _CallSettingFrame(handlerAddress,
|
|
pEstablisherFrame,
|
|
0x100);
|
|
} __except(ExFilterRethrow(exception_info(),
|
|
pThisException,
|
|
&rethrow)) {
|
|
rethrow = 1;
|
|
if (TranslatedCatch) {
|
|
// Note in case of rethrow, no one else can convert rethrow to
|
|
// pThisException. This means only this except will deal with conversion
|
|
// of rethrow to pThisException. Instead of pThisException, we
|
|
// will throw original Foreign Exception. Also we will need to
|
|
// destroy Exception Object of before Raising Foreign Exception.
|
|
__DestructExceptionObject(pThisException, TRUE);
|
|
__RethrowException(pForeignException);
|
|
} else {
|
|
__RethrowException(pThisException);
|
|
}
|
|
}
|
|
} __finally {
|
|
_FindAndUnlinkFrame(pFrameInfo);
|
|
if ( !rethrow &&
|
|
PER_IS_MSVC_EH(pThisException) &&
|
|
_IsExceptionObjectToBeDestroyed(PER_PEXCEPTOBJ(pThisException)))
|
|
{
|
|
__DestructExceptionObject(pThisException, TRUE);
|
|
}
|
|
_pCurrentException = pSaveException;
|
|
_pCurrentExContext = pSaveContext;
|
|
}
|
|
#if defined(_M_AMD64)
|
|
UNWINDHELP(*pEstablisherFrame, FUNC_DISPUNWINDHELP(*pFuncInfo)) = -2;
|
|
#elif defined(_M_IA64)
|
|
UNWINDHELP(pEstablisherFrame->MemoryStackFp, FUNC_DISPUNWINDHELP(*pFuncInfo)) = -2;
|
|
#endif
|
|
return continuationAddress;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// ExFilterRethrow - Exception filter for re-throw exceptions.
|
|
//
|
|
// Returns:
|
|
// EXCEPTION_EXECUTE_HANDLER - exception was a re-throw
|
|
// EXCEPTION_CONTINUE_SEARCH - anything else
|
|
//
|
|
// Side-effects: sets rethrow = TRUE if exception objects of the two Exception matches
|
|
|
|
static int ExFilterRethrow(
|
|
EXCEPTION_POINTERS *pExPtrs,
|
|
EHExceptionRecord *pOldExcept,
|
|
int *rethrow
|
|
) {
|
|
// Get the exception record thrown (don't care about other info)
|
|
EHExceptionRecord *pExcept = (EHExceptionRecord *)pExPtrs->ExceptionRecord;
|
|
*rethrow = 0;
|
|
if (PER_IS_MSVC_EH(pExcept) && PER_PEXCEPTOBJ(pExcept) == PER_PEXCEPTOBJ(pOldExcept))
|
|
*rethrow = 1;
|
|
// Check if it's ours and it's has no exception information.
|
|
if (PER_IS_MSVC_EH(pExcept) && PER_PTHROW(pExcept) == NULL) {
|
|
*rethrow = 1;
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
}
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
}
|
|
|
|
#elif defined(_M_IX86)
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// CallCatchBlock - continuation of CatchIt.
|
|
//
|
|
// This is seperated from CatchIt because it needs to introduce an SEH/EH frame
|
|
// in case the catch block throws. This frame cannot be added until unwind of
|
|
// nested frames has been completed (otherwise this frame would be the first
|
|
// to go).
|
|
|
|
static void *CallCatchBlock(
|
|
EHExceptionRecord *pExcept, // The exception thrown
|
|
EHRegistrationNode *pRN, // Dynamic info of function with catch
|
|
CONTEXT *pContext, // Context info
|
|
FuncInfo *pFuncInfo, // Static info of function with catch
|
|
void *handlerAddress, // Code address of handler
|
|
int CatchDepth, // How deeply nested in catch blocks
|
|
// are we?
|
|
unsigned long NLGCode // NLG destination code
|
|
) {
|
|
EHTRACE_ENTER;
|
|
|
|
// Address where execution resumes after exception handling completed.
|
|
// Initialized to non-NULL (value doesn't matter) to distinguish from
|
|
// re-throw in __finally.
|
|
void *continuationAddress = handlerAddress;
|
|
|
|
BOOL ExceptionObjectDestroyed = FALSE;
|
|
|
|
// The stack pointer at entry to the try must be saved, in case there is
|
|
// another try inside this catch. We'll restore it on our way out.
|
|
void *saveESP = PRN_STACK(pRN);
|
|
|
|
// Push this catch block's frame info on a linked list
|
|
FRAMEINFO FrameInfo;
|
|
FRAMEINFO *pFrameInfo = _CreateFrameInfo(&FrameInfo, PER_PEXCEPTOBJ(pExcept));
|
|
|
|
// Save the current exception in case of a rethrow. Save the previous value
|
|
// on the stack, to be restored when the catch exits.
|
|
EHExceptionRecord *pSaveException = _pCurrentException;
|
|
CONTEXT *pSaveExContext = _pCurrentExContext;
|
|
|
|
_pCurrentException = pExcept;
|
|
_pCurrentExContext = pContext;
|
|
|
|
__try {
|
|
__try {
|
|
// Execute the handler as a funclet, whose return value is the
|
|
// address to resume execution.
|
|
|
|
continuationAddress = _CallCatchBlock2(pRN, pFuncInfo,
|
|
handlerAddress, CatchDepth, NLGCode);
|
|
} __except(EHTRACE_EXCEPT(ExFilterRethrow(exception_info()))) {
|
|
// Here we are exiting the catch block on rethrow out of this
|
|
// catch block. To keep the order of destruction and construction
|
|
// same when the the rethrow was from function or was inline, here
|
|
// we unwind to the parent state for this catch.
|
|
UnwindMapEntry *pUnwindMap = pFuncInfo->pUnwindMap;
|
|
int cState = GetCurrentState(pRN, handlerAddress, pFuncInfo);
|
|
TryBlockMapEntry *pTryBlockMap = pFuncInfo->pTryBlockMap;
|
|
unsigned int i;
|
|
for (i = 0; i < pFuncInfo->nTryBlocks; i++) {
|
|
if (cState > pTryBlockMap[i].tryHigh &&
|
|
cState <= pTryBlockMap[i].catchHigh) {
|
|
cState = pTryBlockMap[i].tryHigh +1;
|
|
cState = pUnwindMap[cState].toState;
|
|
break;
|
|
}
|
|
}
|
|
__FrameUnwindToState(pRN, NULL, pFuncInfo, cState);
|
|
// If the handler threw a typed exception without exception info or
|
|
// exception object, then it's a re-throw, so return. Otherwise
|
|
// it's a new exception, which takes precedence over this one.
|
|
continuationAddress = NULL;
|
|
}
|
|
} __finally {
|
|
EHTRACE_SAVE_LEVEL;
|
|
EHTRACE_FMT1("Executing __finally, %snormal termination", _abnormal_termination() ? "ab" : "");
|
|
|
|
// Restore the saved stack pointer, so the stack can be reset when
|
|
// we're done.
|
|
PRN_STACK(pRN) = saveESP;
|
|
|
|
// Pop this catch block's frame info
|
|
_FindAndUnlinkFrame(pFrameInfo);
|
|
|
|
// Restore the 'current exception' for a possibly enclosing catch
|
|
_pCurrentException = pSaveException;
|
|
_pCurrentExContext = pSaveExContext;
|
|
|
|
// Destroy the original exception object if we're not exiting on a
|
|
// re-throw and the object isn't also in use by a more deeply nested
|
|
// catch. Note that the catch handles destruction of its parameter.
|
|
|
|
if (PER_IS_MSVC_EH(pExcept) && !ExceptionObjectDestroyed
|
|
&& continuationAddress != NULL
|
|
&& IsExceptionObjectToBeDestroyed(PER_PEXCEPTOBJ(pExcept))
|
|
) {
|
|
__DestructExceptionObject(pExcept, abnormal_termination());
|
|
}
|
|
|
|
EHTRACE_RESTORE_LEVEL(!!_abnormal_termination());
|
|
}
|
|
EHTRACE_EXIT;
|
|
return continuationAddress;
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// ExFilterRethrow - Exception filter for re-throw exceptions.
|
|
//
|
|
// Returns:
|
|
// EXCEPTION_EXECUTE_HANDLER - exception was a re-throw
|
|
// EXCEPTION_CONTINUE_SEARCH - anything else
|
|
//
|
|
// Side-effects: NONE.
|
|
|
|
static int ExFilterRethrow(
|
|
EXCEPTION_POINTERS *pExPtrs
|
|
) {
|
|
// Get the exception record thrown (don't care about other info)
|
|
EHExceptionRecord *pExcept = (EHExceptionRecord *)pExPtrs->ExceptionRecord;
|
|
|
|
// Check if it's ours and it's has no exception information.
|
|
if (PER_IS_MSVC_EH(pExcept) && PER_PTHROW(pExcept) == NULL) {
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
} else {
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// BuildCatchObject - Copy or construct the catch object from the object thrown.
|
|
//
|
|
// Returns:
|
|
// nothing.
|
|
//
|
|
// Side-effects:
|
|
// A buffer in the subject function's frame is initialized.
|
|
//
|
|
// Open issues:
|
|
// What happens if the constructor throws? (or faults?)
|
|
|
|
static void BuildCatchObject(
|
|
EHExceptionRecord *pExcept, // Original exception thrown
|
|
void *pRN, // This is a pointer to the object
|
|
// that we want to build while doing
|
|
// COM+ eh. If we are in our own eh,
|
|
// then this is a Registration node of
|
|
// catching function
|
|
HandlerType *pCatch, // The catch clause that got it
|
|
CatchableType *pConv // The conversion to use
|
|
) {
|
|
EHTRACE_ENTER;
|
|
|
|
// If the catch is by ellipsis, then there is no object to construct.
|
|
// If the catch is by type(No Catch Object), then leave too!
|
|
if (HT_IS_TYPE_ELLIPSIS(*pCatch) ||
|
|
(!HT_DISPCATCH(*pCatch) && !HT_ISCOMPLUSEH(*pCatch))) {
|
|
EHTRACE_EXIT;
|
|
return;
|
|
}
|
|
|
|
void **pCatchBuffer;
|
|
if ( HT_ISCOMPLUSEH(*pCatch))
|
|
{
|
|
pCatchBuffer = (void **)pRN;
|
|
}
|
|
else
|
|
{
|
|
#if defined(_M_IA64) /*IFSTRIP=IGN*/
|
|
pCatchBuffer = (void **)__OffsetToAddress(
|
|
HT_DISPCATCH(*pCatch),
|
|
((EHRegistrationNode *)pRN)->MemoryStackFp,
|
|
HT_FRAMENEST(*pCatch)
|
|
);
|
|
#elif defined(_M_AMD64)
|
|
pCatchBuffer = (void **)__OffsetToAddress(
|
|
HT_DISPCATCH(*pCatch),
|
|
*((EHRegistrationNode *)pRN),
|
|
HT_FRAMENEST(*pCatch)
|
|
);
|
|
#else
|
|
pCatchBuffer = (void **)__OffsetToAddress(
|
|
HT_DISPCATCH(*pCatch),
|
|
(EHRegistrationNode *)pRN,
|
|
HT_FRAMENEST(*pCatch)
|
|
);
|
|
#endif
|
|
}
|
|
__try {
|
|
if (HT_ISREFERENCE(*pCatch)) {
|
|
|
|
// The catch is of form 'reference to T'. At the throw point we
|
|
// treat both 'T' and 'reference to T' the same, i.e.
|
|
// pExceptionObject is a (machine) pointer to T. Adjust as
|
|
// required.
|
|
if (_ValidateRead(PER_PEXCEPTOBJ(pExcept))
|
|
&& _ValidateWrite(pCatchBuffer)) {
|
|
*pCatchBuffer = PER_PEXCEPTOBJ(pExcept);
|
|
*pCatchBuffer = AdjustPointer(*pCatchBuffer,
|
|
CT_THISDISP(*pConv));
|
|
} else {
|
|
_inconsistency(); // Does not return; TKB
|
|
}
|
|
} else if (CT_ISSIMPLETYPE(*pConv)) {
|
|
|
|
// Object thrown is of simple type (this including pointers) copy
|
|
// specified number of bytes. Adjust the pointer as required. If
|
|
// the thing is not a pointer, then this should be safe since all
|
|
// the entries in the THISDISP are 0.
|
|
if (_ValidateRead(PER_PEXCEPTOBJ(pExcept))
|
|
&& _ValidateWrite(pCatchBuffer)) {
|
|
memmove(pCatchBuffer, PER_PEXCEPTOBJ(pExcept), CT_SIZE(*pConv));
|
|
|
|
if (CT_SIZE(*pConv) == sizeof(void*) && *pCatchBuffer != NULL) {
|
|
*pCatchBuffer = AdjustPointer(*pCatchBuffer,
|
|
CT_THISDISP(*pConv));
|
|
}
|
|
} else {
|
|
_inconsistency(); // Does not return; TKB
|
|
}
|
|
} else {
|
|
|
|
// Object thrown is UDT.
|
|
if (CT_COPYFUNC(*pConv) == NULL) {
|
|
|
|
// The UDT had a simple ctor. Adjust in the thrown object,
|
|
// then copy n bytes.
|
|
if (_ValidateRead(PER_PEXCEPTOBJ(pExcept))
|
|
&& _ValidateWrite(pCatchBuffer)) {
|
|
memmove(pCatchBuffer, AdjustPointer(PER_PEXCEPTOBJ(pExcept),
|
|
CT_THISDISP(*pConv)), CT_SIZE(*pConv));
|
|
} else {
|
|
_inconsistency(); // Does not return; TKB
|
|
}
|
|
} else {
|
|
|
|
// It's a UDT: make a copy using copy ctor
|
|
|
|
#pragma warning(disable:4191)
|
|
|
|
if (_ValidateRead(PER_PEXCEPTOBJ(pExcept))
|
|
&& _ValidateWrite(pCatchBuffer)
|
|
&& _ValidateExecute((FARPROC)CT_COPYFUNC(*pConv))) {
|
|
|
|
#pragma warning(default:4191)
|
|
|
|
if (CT_HASVB(*pConv)) {
|
|
_CallMemberFunction2((char *)pCatchBuffer,
|
|
CT_COPYFUNC(*pConv),
|
|
AdjustPointer(PER_PEXCEPTOBJ(pExcept),
|
|
CT_THISDISP(*pConv)), 1);
|
|
} else {
|
|
_CallMemberFunction1((char *)pCatchBuffer,
|
|
CT_COPYFUNC(*pConv),
|
|
AdjustPointer(PER_PEXCEPTOBJ(pExcept),
|
|
CT_THISDISP(*pConv)));
|
|
}
|
|
} else {
|
|
_inconsistency(); // Does not return; TKB
|
|
}
|
|
}
|
|
}
|
|
} __except(EHTRACE_EXCEPT(EXCEPTION_EXECUTE_HANDLER)) {
|
|
// Something went wrong when building the catch object.
|
|
terminate();
|
|
}
|
|
|
|
EHTRACE_EXIT;
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// __DestructExceptionObject - Call the destructor (if any) of the original
|
|
// exception object.
|
|
//
|
|
// Returns: None.
|
|
//
|
|
// Side-effects:
|
|
// Original exception object is destructed.
|
|
//
|
|
// Notes:
|
|
// If destruction throws any exception, and we are destructing the exception
|
|
// object as a result of a new exception, we give up. If the destruction
|
|
// throws otherwise, we let it be.
|
|
|
|
extern "C" void _CRTIMP __DestructExceptionObject(
|
|
EHExceptionRecord *pExcept, // The original exception record
|
|
BOOLEAN fThrowNotAllowed // TRUE if destructor not allowed to
|
|
// throw
|
|
) {
|
|
EHTRACE_ENTER_FMT1("Destroying object @ 0x%p", PER_PEXCEPTOBJ(pExcept));
|
|
|
|
if (pExcept != NULL && THROW_UNWINDFUNC(*PER_PTHROW(pExcept)) != NULL) {
|
|
|
|
__try {
|
|
|
|
// M00REVIEW: A destructor has additional hidden arguments, doesn't
|
|
// it?
|
|
|
|
#if defined(_M_IA64) || defined(_M_AMD64) /*IFSTRIP=IGN*/
|
|
_CallMemberFunction0(PER_PEXCEPTOBJ(pExcept),
|
|
THROW_UNWINDFUNC_IB(*PER_PTHROW(pExcept),(unsigned __int64)PER_PTHROWIB(pExcept)));
|
|
#else
|
|
_CallMemberFunction0(PER_PEXCEPTOBJ(pExcept),
|
|
THROW_UNWINDFUNC(*PER_PTHROW(pExcept)));
|
|
#endif
|
|
__ResetException(pExcept);
|
|
|
|
} __except(EHTRACE_EXCEPT(fThrowNotAllowed
|
|
? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH)) {
|
|
|
|
// Can't have new exceptions when we're unwinding due to another
|
|
// exception.
|
|
terminate();
|
|
}
|
|
}
|
|
|
|
EHTRACE_EXIT;
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// AdjustPointer - Adjust the pointer to the exception object to a pointer to a
|
|
// base instance.
|
|
//
|
|
// Output:
|
|
// The address point of the base.
|
|
//
|
|
// Side-effects:
|
|
// NONE.
|
|
|
|
static void *AdjustPointer(
|
|
void *pThis, // Address point of exception object
|
|
const PMD& pmd // Generalized pointer-to-member
|
|
// descriptor
|
|
) {
|
|
char *pRet = (char *)pThis + pmd.mdisp;
|
|
|
|
if (pmd.pdisp >= 0) {
|
|
pRet += *(__int32 *)((char *)*(ptrdiff_t *)((char *)pThis + pmd.pdisp)
|
|
#if defined(_WIN64)
|
|
+ (unsigned _int64)pmd.vdisp);
|
|
#else
|
|
+ pmd.vdisp);
|
|
#endif
|
|
pRet += pmd.pdisp;
|
|
}
|
|
|
|
return pRet;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// __uncaught_exception() - Returns true after completing of a throw-expression
|
|
// untils completing initialization of the
|
|
// exception-declaration in the matching handler.
|
|
//
|
|
|
|
|
|
bool __uncaught_exception()
|
|
{
|
|
return (__ProcessingThrow != 0);
|
|
}
|
|
|
|
|
|
#if !defined(_M_AMD64) // Enable&fix for AMD64 when COM+ C++ EH support available there
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// Model of C++ eh in COM+
|
|
//
|
|
// void func()
|
|
// {
|
|
// try {
|
|
// TryBody();
|
|
// } catch (cpp_object o)
|
|
// {
|
|
// CatchOBody();
|
|
// } catch (...)
|
|
// {
|
|
// CatchAllBody();
|
|
// }
|
|
// }
|
|
//
|
|
// Turns into this:
|
|
//
|
|
//
|
|
// void func()
|
|
// {
|
|
// int rethrow;
|
|
// // One per try block
|
|
// int isCxxException;
|
|
// // One per catch(...)
|
|
// __try {
|
|
// TryBody();
|
|
// }
|
|
// __except(__CxxExceptionFilter(exception,
|
|
// typeinfo(cpp_object),
|
|
// flags,
|
|
// &o))
|
|
// // This is how it's done already
|
|
// {
|
|
// // Begin catch(object) prefix
|
|
// char *storage = _alloca(__CxxQueryExceptionSize());
|
|
// rethrow = false;
|
|
// __CxxRegisterExceptionObject(exception,
|
|
// storage);
|
|
// __try {
|
|
// __try {
|
|
// // End catch(object) prefix
|
|
// CatchOBody();
|
|
// // Begin catch(object) suffix
|
|
// } __except(rethrow = __CxxDetectRethrow(exception),
|
|
// EXCEPTION_CONTINUE_SEARCH)
|
|
// {}
|
|
// }
|
|
// __finally
|
|
// {
|
|
// __CxxUnregisterExceptionObject(storage,
|
|
// rethrow);
|
|
// }
|
|
// // End catch(object) suffix
|
|
// }
|
|
// __except(1)
|
|
// {
|
|
// // Begin catch(...) prefix
|
|
// char *storage = _alloca(__CxxQueryExceptionSize());
|
|
// rethrow = false;
|
|
// isCxxException = __CxxRegisterExceptionObject(exception,
|
|
// storage);
|
|
// __try
|
|
// {
|
|
// __try
|
|
// {
|
|
// // End catch(...) prefix
|
|
// CatchAllBody();
|
|
// // Begin catch(...) suffix
|
|
// } __except(rethrow = __CxxDetectRethrow(exception),
|
|
// EXCEPTION_CONTINUE_SEARCH)
|
|
// {}
|
|
// } __finally
|
|
// {
|
|
// if (isCxxException)
|
|
// __CxxUnregisterExceptionObject(storage, rethrow);
|
|
// }
|
|
// // End catch(...) suffix
|
|
// }
|
|
// }
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// __CxxExceptionFilter() - Returns EXCEPTION_EXECUTE_HANDLER when the pType
|
|
// matches with the objects we can catch. Returns
|
|
// EXCEPTION_CONTINUE_SEARCH when pType is not one of
|
|
// the catchable type for the thrown object. This
|
|
// function is made for use with COM+ EH, where they
|
|
// attempt to do C++ EH as well.
|
|
//
|
|
|
|
|
|
extern "C" int __cdecl __CxxExceptionFilter(
|
|
void *ppExcept, // Information for this (logical)
|
|
// exception
|
|
void *pType, // Info about the datatype.
|
|
int adjectives, // Extra Info about the datatype.
|
|
void *pBuildObj // Pointer to datatype.
|
|
)
|
|
{
|
|
#ifndef _M_IA64 // Enable&fix for IA64 when COM+ C++ EH support available there
|
|
struct _s_HandlerType pCatch;
|
|
#if defined(_M_IA64) || defined(_M_AMD64)
|
|
__int32 const *ppCatchable;
|
|
#elif defined(_WIN64)
|
|
CatchableType * UNALIGNED const *ppCatchable;
|
|
#else
|
|
CatchableType * const *ppCatchable;
|
|
#endif
|
|
CatchableType *pCatchable;
|
|
int catchables;
|
|
EHExceptionRecord *pExcept;
|
|
|
|
if (!ppExcept) {
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
}
|
|
pExcept = *(EHExceptionRecord **)ppExcept;
|
|
// If catch all, always return EXCEPTION_EXECUTE_HANDLER
|
|
if ( TD_IS_TYPE_ELLIPSIS((TypeDescriptor *)pType))
|
|
{
|
|
if (PER_IS_MSVC_EH(pExcept))
|
|
{
|
|
if ( PER_PTHROW(pExcept) == NULL)
|
|
{
|
|
if ( _pCurrentException == NULL) {
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
}
|
|
}
|
|
}
|
|
__ProcessingThrow++;
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
}
|
|
if (PER_IS_MSVC_EH(pExcept))
|
|
{
|
|
if ( PER_PTHROW(pExcept) == NULL) {
|
|
if (_pCurrentException == NULL)
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
pExcept = _pCurrentException;
|
|
}
|
|
pCatch.pType = (TypeDescriptor *)pType;
|
|
pCatch.adjectives = adjectives;
|
|
SET_HT_ISCOMPLUSEH(pCatch);
|
|
|
|
// Scan all types that thrown object can be converted to:
|
|
ppCatchable = THROW_CTLIST(*PER_PTHROW(pExcept));
|
|
for (catchables = THROW_COUNT(*PER_PTHROW(pExcept));
|
|
catchables > 0; catchables--, ppCatchable++) {
|
|
|
|
#if defined(_M_IA64) || defined(_M_AMD64)
|
|
pCatchable = (CatchableType *)(_GetThrowImageBase() + *ppCatchable);
|
|
#else
|
|
pCatchable = *ppCatchable;
|
|
#endif
|
|
|
|
if (TypeMatch(&pCatch, pCatchable, PER_PTHROW(pExcept))) {
|
|
// SucessFull. Now build the object.
|
|
__ProcessingThrow++;
|
|
if (pBuildObj != NULL)
|
|
BuildCatchObject(pExcept, pBuildObj, &pCatch, pCatchable);
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
}
|
|
} // Scan posible conversions
|
|
}
|
|
#endif // ndef _M_IA64
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// __CxxRgisterExceptionObject() - Registers Exception Object and saves it to
|
|
// This is same as first part of
|
|
// CallCatchBlock.
|
|
//
|
|
extern "C" int __cdecl __CxxRegisterExceptionObject(
|
|
void *ppExcept,
|
|
void *pStorage
|
|
)
|
|
{
|
|
#ifndef _M_IA64 // Enable&fix for IA64 when COM+ C++ EH support available there
|
|
// This function is only called for C++ EH.
|
|
EHExceptionRecord *pExcept = NULL;
|
|
FRAMEINFO *pFrameInfo = (FRAMEINFO *)pStorage;
|
|
EHExceptionRecord **ppSaveException;
|
|
CONTEXT **ppSaveExContext;
|
|
ppSaveException = (EHExceptionRecord **)(&pFrameInfo[1]);
|
|
ppSaveExContext = (CONTEXT **)(&ppSaveException[1]);
|
|
if (ppExcept != NULL && (*(void **)ppExcept) != NULL) {
|
|
pExcept = *(EHExceptionRecord **)ppExcept;
|
|
if (PER_IS_MSVC_EH(pExcept)) {
|
|
if ( PER_PTHROW(pExcept) == NULL) {
|
|
// was a rethrow
|
|
pExcept = _pCurrentException;
|
|
}
|
|
}
|
|
pFrameInfo = _CreateFrameInfo(pFrameInfo, PER_PEXCEPTOBJ(pExcept));
|
|
*ppSaveException = _pCurrentException;
|
|
*ppSaveExContext = _pCurrentExContext;
|
|
_pCurrentException = pExcept;
|
|
} else {
|
|
*ppSaveException = (EHExceptionRecord *)-1;
|
|
*ppSaveExContext = (CONTEXT *)-1;
|
|
}
|
|
__ProcessingThrow--;
|
|
if ( __ProcessingThrow < 0)
|
|
__ProcessingThrow = 0;
|
|
#endif // ndef _M_IA64
|
|
return 1;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// __CxxDetectRethrow() - Looks at the Exception and returns true if rethrow,
|
|
// false if not a rethrow. This is then used for
|
|
// destructing the exception object in
|
|
// __CxxUnregisterExceptionObject().
|
|
//
|
|
extern "C" int __cdecl __CxxDetectRethrow(
|
|
void *ppExcept
|
|
)
|
|
{
|
|
#ifndef _M_IA64 // Enable&fix for IA64 when COM+ C++ EH support available there
|
|
EHExceptionRecord *pExcept;
|
|
if (!ppExcept)
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
pExcept = *(EHExceptionRecord **)ppExcept;
|
|
if (PER_IS_MSVC_EH(pExcept) && PER_PTHROW(pExcept) == NULL) {
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
}
|
|
#endif // ndef _M_IA64
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// __CxxUnregisterExceptionObject - Destructs Exception Objects if rethrow ==
|
|
// true. Also set __pCurrentException and
|
|
// __pCurrentExContext() to current value.
|
|
//
|
|
extern "C" void __cdecl __CxxUnregisterExceptionObject(
|
|
void *pStorage,
|
|
int rethrow
|
|
)
|
|
{
|
|
#ifndef _M_IA64 // Enable&fix for IA64 when COM+ C++ EH support available there
|
|
FRAMEINFO *pFrameInfo = (FRAMEINFO *)pStorage;
|
|
EHExceptionRecord **ppSaveException;
|
|
CONTEXT **ppSaveExContext;
|
|
ppSaveException = (EHExceptionRecord **)(&pFrameInfo[1]);
|
|
ppSaveExContext = (CONTEXT **)(&ppSaveException[1]);
|
|
if (*ppSaveException != (void *)-1) {
|
|
_FindAndUnlinkFrame(pFrameInfo);
|
|
if ( !rethrow && PER_IS_MSVC_EH(_pCurrentException) && IsExceptionObjectToBeDestroyed(PER_PEXCEPTOBJ(_pCurrentException))) {
|
|
__DestructExceptionObject(_pCurrentException, TRUE);
|
|
}
|
|
_pCurrentException = *ppSaveException;
|
|
_pCurrentExContext = *ppSaveExContext;
|
|
}
|
|
#endif // ndef _M_IA64
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// __CxxQueryExceptionSize - returns the value of Storage needed to save
|
|
// FrameInfo + two pointers.
|
|
//
|
|
extern "C" int __cdecl __CxxQueryExceptionSize(
|
|
void
|
|
)
|
|
{
|
|
return sizeof(FRAMEINFO) + sizeof(void *) + sizeof(void *);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// __CxxCallUnwindDtor - Calls a destructor during unwind. For COM+, the dtor
|
|
// call needs to be wrapped inside a __try/__except to
|
|
// get correct terminate() behavior when an exception
|
|
// occurs during the dtor call.
|
|
//
|
|
extern "C" void __cdecl __CxxCallUnwindDtor(
|
|
#ifndef _M_IA64 // Enable&fix for IA64 when COM+ C++ EH support available there
|
|
void (__thiscall * pDtor)(void*),
|
|
#else
|
|
void (* pDtor)(void *),
|
|
#endif // ndef _M_IA64
|
|
void *pThis
|
|
)
|
|
{
|
|
#ifndef _M_IA64 // Enable&fix for IA64 when COM+ C++ EH support available there
|
|
__try
|
|
{
|
|
(*pDtor)(pThis);
|
|
}
|
|
__except(FrameUnwindFilter(exception_info()))
|
|
{
|
|
}
|
|
#endif // ndef _M_IA64
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////
|
|
// __CxxCallUnwindVecDtor - Calls a vector destructor during vector unwind.
|
|
// For COM+, the dtor call needs to be wrapped inside
|
|
// a __try/__except to get correct terminate() behavior
|
|
// when an exception occurs during the dtor call.
|
|
//
|
|
extern "C" void __cdecl __CxxCallUnwindVecDtor(
|
|
#ifndef _M_IA64 // Enable&fix for IA64 when COM+ C++ EH support available there
|
|
void (__stdcall * pVecDtor)(void*, size_t, int, void (__thiscall *)(void*)),
|
|
#else
|
|
void (* pVecDtor)(void*, size_t, int, void (*)(void*)),
|
|
#endif // ndef _M_IA64
|
|
void* ptr,
|
|
size_t size,
|
|
int count,
|
|
#ifndef _M_IA64 // Enable&fix for IA64 when COM+ C++ EH support available there
|
|
void (__thiscall * pDtor)(void*)
|
|
#else
|
|
void (* pDtor)(void *)
|
|
#endif // ndef _M_IA64
|
|
)
|
|
{
|
|
#ifndef _M_IA64 // Enable&fix for IA64 when COM+ C++ EH support available there
|
|
__try
|
|
{
|
|
(*pVecDtor)(ptr, size, count, pDtor);
|
|
}
|
|
__except(FrameUnwindFilter(exception_info()))
|
|
{
|
|
}
|
|
#endif // ndef _M_IA64
|
|
}
|
|
#endif // ndef _M_AMD64
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////
|
|
// IsInExceptionSpec - Checks if the exception matches the exception specification
|
|
// list. Returns TRUE if it does, otherwise FALSE
|
|
//
|
|
BOOLEAN IsInExceptionSpec(
|
|
EHExceptionRecord *pExcept, // Information for this (logical)
|
|
// exception
|
|
ESTypeList *pESTypeList // Static information for subject frame
|
|
)
|
|
{
|
|
DASSERT( pESTypeList != NULL );
|
|
|
|
BOOLEAN bFoundMatchingTypeInES = FALSE;
|
|
|
|
#if defined(_M_IA64) || defined(_M_AMD64)
|
|
__int32 const *ppCatchable;
|
|
#elif defined(_WIN64)
|
|
CatchableType * UNALIGNED const *ppCatchable;
|
|
#else
|
|
CatchableType * const *ppCatchable;
|
|
#endif
|
|
CatchableType *pCatchable;
|
|
int catchables;
|
|
|
|
// for every type in the exception spec...
|
|
for (int i=0; i<EST_COUNT(pESTypeList); i++ )
|
|
{
|
|
// for all types that thrown object can be converted to...
|
|
ppCatchable = THROW_CTLIST(*PER_PTHROW(pExcept));
|
|
for (catchables = THROW_COUNT(*PER_PTHROW(pExcept));
|
|
catchables > 0; catchables--, ppCatchable++) {
|
|
|
|
#if defined(_M_IA64) || defined(_M_AMD64)
|
|
pCatchable = (CatchableType *)(_GetThrowImageBase() + *ppCatchable);
|
|
#else
|
|
pCatchable = *ppCatchable;
|
|
#endif
|
|
if (TypeMatch(EST_ARRAY(pESTypeList,i), pCatchable, PER_PTHROW(pExcept)))
|
|
{
|
|
bFoundMatchingTypeInES = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return bFoundMatchingTypeInES;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////
|
|
// CallUnexpected - Calls unexpected and handles all exceptions
|
|
// thrown by it
|
|
//
|
|
// The unexpected() function shall not return, but it can throw (or re-throw) an
|
|
// exception.
|
|
//
|
|
// If it throws a new exception which is allowed by the exception
|
|
// specification which previously was violated, then
|
|
// {
|
|
// the search for another handler will continue at the call of the function
|
|
// whose exception specification was violated.
|
|
// }
|
|
// else /* If it throws or rethrows an exception that the exception-specification does not
|
|
// allow */ then the following happens:
|
|
// {
|
|
// If the exception-specification does not include the class std::bad_exception
|
|
// (lib.bad.exception) then
|
|
// {
|
|
// the function terminate() is called,
|
|
// }
|
|
// otherwise
|
|
// {
|
|
// the thrown exception is replaced by an implementation-defined
|
|
// object of the type std::bad_exception and the search for another handler
|
|
// will continue at the call of the function whose exception-specification
|
|
// was violated.
|
|
// }
|
|
// }
|
|
//
|
|
// Simple, isn't it?
|
|
//
|
|
void CallUnexpected( ESTypeList* pESTypeList )
|
|
{
|
|
DASSERT( _pCurrentFuncInfo == NULL );
|
|
|
|
try
|
|
{
|
|
unexpected();
|
|
}
|
|
catch(...)
|
|
{
|
|
_pCurrentFuncInfo = pESTypeList;
|
|
|
|
throw; // rethrow -- we will catch it in the FrameHandler
|
|
}
|
|
terminate();
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////
|
|
// Is_bad_exception_allowed - checks if std::bad_exception belongs to the list
|
|
//
|
|
BOOLEAN Is_bad_exception_allowed(ESTypeList *pESTypeList)
|
|
{
|
|
for (int i=0; i<EST_COUNT(pESTypeList); i++ )
|
|
{
|
|
if( *(type_info*)HT_PTD(*EST_ARRAY(pESTypeList,i)) == typeid( std::bad_exception ) )
|
|
{
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|