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_URC_CONTINUE_UNWIND = 8,
_URC_FAILURE = 9
} _Unwind_Reason_Code;
struct objc_exception {
struct _Unwind_Exception {
uint64_t class;
void (*cleanup)(
void (*cleanup)(_Unwind_Reason_Code, struct _Unwind_Exception*);
_Unwind_Reason_Code, struct _Unwind_Exception *);
#ifndef HAVE_ARM_EHABI_EXCEPTIONS
# ifndef HAVE_SEH_EXCEPTIONS
/*
* The Itanium Exception ABI says to have those and never touch
* them.
*/
uint64_t private1, private2;
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uint8_t typestable_enc;
const uint8_t *typestable;
uintptr_t typestable_base;
uint8_t callsites_enc;
const uint8_t *callsites, *actiontable;
};
extern _Unwind_Reason_Code _Unwind_RaiseException(struct _Unwind_Exception*);
extern void _Unwind_DeleteException(struct _Unwind_Exception*);
extern void* _Unwind_GetLanguageSpecificData(struct _Unwind_Context*);
extern uintptr_t _Unwind_GetRegionStart(struct _Unwind_Context*);
extern uintptr_t _Unwind_GetDataRelBase(struct _Unwind_Context*);
extern uintptr_t _Unwind_GetTextRelBase(struct _Unwind_Context*);
extern _Unwind_Reason_Code _Unwind_RaiseException(struct _Unwind_Exception *);
extern void _Unwind_DeleteException(struct _Unwind_Exception *);
extern void *_Unwind_GetLanguageSpecificData(struct _Unwind_Context *);
extern uintptr_t _Unwind_GetRegionStart(struct _Unwind_Context *);
extern uintptr_t _Unwind_GetDataRelBase(struct _Unwind_Context *);
extern uintptr_t _Unwind_GetTextRelBase(struct _Unwind_Context *);
#ifndef HAVE_ARM_EHABI_EXCEPTIONS
# define CONTINUE_UNWIND return _URC_CONTINUE_UNWIND
extern uintptr_t _Unwind_GetIP(struct _Unwind_Context*);
extern void _Unwind_SetIP(struct _Unwind_Context*, uintptr_t);
extern void _Unwind_SetGR(struct _Unwind_Context*, int, uintptr_t);
extern uintptr_t _Unwind_GetIP(struct _Unwind_Context *);
extern void _Unwind_SetIP(struct _Unwind_Context *, uintptr_t);
extern void _Unwind_SetGR(struct _Unwind_Context *, int, uintptr_t);
#else
extern _Unwind_Reason_Code __gnu_unwind_frame(struct _Unwind_Exception*,
struct _Unwind_Context*);
extern int _Unwind_VRS_Get(struct _Unwind_Context*, int, uint32_t, int, void*);
extern int _Unwind_VRS_Set(struct _Unwind_Context*, int, uint32_t, int, void*);
extern _Unwind_Reason_Code __gnu_unwind_frame(struct _Unwind_Exception *,
struct _Unwind_Context *);
extern int _Unwind_VRS_Get(struct _Unwind_Context *, int, uint32_t, int,
void *);
extern int _Unwind_VRS_Set(struct _Unwind_Context *, int, uint32_t, int,
void *);
# define CONTINUE_UNWIND \
{ \
if (__gnu_unwind_frame(ex, ctx) != _URC_OK) \
return _URC_FAILURE; \
\
return _URC_CONTINUE_UNWIND; \
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#endif
#ifdef CXX_PERSONALITY
static PERSONALITY_FUNC(cxx_personality) OF_WEAK_REF(CXX_PERSONALITY_STR);
#endif
#ifdef HAVE_SEH_EXCEPTIONS
extern EXCEPTION_DISPOSITION _GCC_specific_handler(PEXCEPTION_RECORD, void*,
PCONTEXT, PDISPATCHER_CONTEXT, _Unwind_Reason_Code(*)(int, int, uint64_t,
struct _Unwind_Exception*, struct _Unwind_Context*));
extern EXCEPTION_DISPOSITION _GCC_specific_handler(PEXCEPTION_RECORD, void *,
PCONTEXT, PDISPATCHER_CONTEXT, _Unwind_Reason_Code (*)(int, int, uint64_t,
struct _Unwind_Exception *, struct _Unwind_Context *));
#endif
static objc_uncaught_exception_handler uncaught_exception_handler;
static struct objc_exception emergency_exceptions[NUM_EMERGENCY_EXCEPTIONS];
#ifdef OF_HAVE_THREADS
static of_spinlock_t emergency_exceptions_spinlock;
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size_for_encoding(uint8_t enc)
{
if (enc == DW_EH_PE_omit)
return 0;
switch (enc & 0x07) {
case DW_EH_PE_absptr:
return sizeof(void*);
return sizeof(void *);
case DW_EH_PE_udata2:
return 2;
case DW_EH_PE_udata4:
return 4;
case DW_EH_PE_udata8:
return 8;
}
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uint64_t value;
if (enc == DW_EH_PE_aligned)
OBJC_ERROR("DW_EH_PE_aligned is not implemented!")
#define READ(type) \
{ \
value = *(type*)(void*)*ptr; \
value = *(type *)(void *)*ptr; \
*ptr += size_for_encoding(enc); \
break; \
}
switch (enc & 0x0F) {
case DW_EH_PE_absptr:
READ(uintptr_t)
case DW_EH_PE_uleb128:
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{
if (value == 0)
return 0;
value += ((enc & 0x70) == DW_EH_PE_pcrel ? (uintptr_t)start : base);
if (enc & DW_EH_PE_indirect)
value = *(uintptr_t*)(uintptr_t)value;
value = *(uintptr_t *)(uintptr_t)value;
return value;
}
#endif
static void
read_lsda(struct _Unwind_Context *ctx, const uint8_t *ptr, struct lsda *lsda)
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i = filter * size_for_encoding(lsda->typestable_enc);
tmp = lsda->typestable - i;
c = (uintptr_t)read_value(lsda->typestable_enc, &tmp);
c = (uintptr_t)resolve_value(c, lsda->typestable_enc,
lsda->typestable - i, lsda->typestable_base);
#else
tmp = lsda->typestable - (filter * 4);
c = *(uintptr_t*)(void*)tmp;
c = *(uintptr_t *)(void *)tmp;
if (c != 0) {
c += (uintptr_t)tmp;
# if defined(OF_LINUX) || defined(OF_NETBSD)
c = *(uintptr_t*)c;
c = *(uintptr_t *)c;
# endif
}
#endif
className = (const char*)c;
className = (const char *)c;
if (className != NULL && *className != '\0' &&
strcmp(className, "@id") != 0)
class = objc_getRequiredClass(className);
else
class = Nil;
|
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CONTINUE_UNWIND;
default:
return _URC_FAILURE;
}
_Unwind_SetGR(ctx, 12, (uintptr_t)ex);
#endif
struct objc_exception *e = (struct objc_exception*)ex;
struct objc_exception *e = (struct objc_exception *)ex;
bool foreign = (ex_class != GNUCOBJC_EXCEPTION_CLASS);
const uint8_t *lsda_addr, *actionrecords;
struct lsda lsda;
uintptr_t landingpad = 0;
uint8_t found = 0;
intptr_t filter = 0;
|
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objc_uncaught_exception_handler old = uncaught_exception_handler;
uncaught_exception_handler = handler;
return old;
}
#ifdef HAVE_SEH_EXCEPTIONS
typedef EXCEPTION_DISPOSITION (*seh_personality_fn)(PEXCEPTION_RECORD, void*,
typedef EXCEPTION_DISPOSITION (*seh_personality_fn)(PEXCEPTION_RECORD, void *,
PCONTEXT, PDISPATCHER_CONTEXT);
static seh_personality_fn __gxx_personality_seh0;
OF_CONSTRUCTOR()
{
/*
* This only works if the application uses libstdc++-6.dll.
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}
EXCEPTION_DISPOSITION
__gnu_objc_personality_seh0(PEXCEPTION_RECORD ms_exc, void *this_frame,
PCONTEXT ms_orig_context, PDISPATCHER_CONTEXT ms_disp)
{
struct _Unwind_Exception *ex =
(struct _Unwind_Exception*)ms_exc->ExceptionInformation[0];
(struct _Unwind_Exception *)ms_exc->ExceptionInformation[0];
switch (ex->class) {
case GNUCCXX0_EXCEPTION_CLASS:
case CLNGCXX0_EXCEPTION_CLASS:
if (__gxx_personality_seh0 != NULL)
return __gxx_personality_seh0(ms_exc, this_frame,
ms_orig_context, ms_disp);
}
return _GCC_specific_handler(ms_exc, this_frame, ms_orig_context,
ms_disp, PERSONALITY);
}
#endif
|