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- // -*- C++ -*- The GNU C++ exception personality routine.
- // Copyright (C) 2001-2022 Free Software Foundation, Inc.
- //
- // This file is part of GCC.
- //
- // GCC is free software; you can redistribute it and/or modify
- // it under the terms of the GNU General Public License as published by
- // the Free Software Foundation; either version 3, or (at your option)
- // any later version.
- //
- // GCC is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
- //
- // Under Section 7 of GPL version 3, you are granted additional
- // permissions described in the GCC Runtime Library Exception, version
- // 3.1, as published by the Free Software Foundation.
- // You should have received a copy of the GNU General Public License and
- // a copy of the GCC Runtime Library Exception along with this program;
- // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
- // <http://www.gnu.org/licenses/>.
- #include <bits/c++config.h>
- #include <cstdlib>
- #include <bits/exception_defines.h>
- #include <cxxabi.h>
- #include "unwind-cxx.h"
- using namespace __cxxabiv1;
- #include "unwind-pe.h"
- struct lsda_header_info
- {
- _Unwind_Ptr Start;
- _Unwind_Ptr LPStart;
- _Unwind_Ptr ttype_base;
- const unsigned char *TType;
- const unsigned char *action_table;
- unsigned char ttype_encoding;
- unsigned char call_site_encoding;
- };
- static const unsigned char *
- parse_lsda_header (_Unwind_Context *context, const unsigned char *p,
- lsda_header_info *info)
- {
- _uleb128_t tmp;
- unsigned char lpstart_encoding;
- info->Start = (context ? _Unwind_GetRegionStart (context) : 0);
- // Find @LPStart, the base to which landing pad offsets are relative.
- lpstart_encoding = *p++;
- if (lpstart_encoding != DW_EH_PE_omit)
- p = read_encoded_value (context, lpstart_encoding, p, &info->LPStart);
- else
- info->LPStart = info->Start;
- // Find @TType, the base of the handler and exception spec type data.
- info->ttype_encoding = *p++;
- if (info->ttype_encoding != DW_EH_PE_omit)
- {
- #if _GLIBCXX_OVERRIDE_TTYPE_ENCODING
- /* Older ARM EABI toolchains set this value incorrectly, so use a
- hardcoded OS-specific format. */
- info->ttype_encoding = _GLIBCXX_OVERRIDE_TTYPE_ENCODING;
- #endif
- p = read_uleb128 (p, &tmp);
- info->TType = p + tmp;
- }
- else
- info->TType = 0;
- // The encoding and length of the call-site table; the action table
- // immediately follows.
- info->call_site_encoding = *p++;
- p = read_uleb128 (p, &tmp);
- info->action_table = p + tmp;
- return p;
- }
- // Return an element from a type table.
- static const std::type_info *
- get_ttype_entry (lsda_header_info *info, _uleb128_t i)
- {
- _Unwind_Ptr ptr;
- i *= size_of_encoded_value (info->ttype_encoding);
- read_encoded_value_with_base (
- #if __FDPIC__
- /* Force these flags to nake sure to
- take the GOT into account. */
- (DW_EH_PE_pcrel | DW_EH_PE_indirect),
- #else
- info->ttype_encoding,
- #endif
- info->ttype_base,
- info->TType - i, &ptr);
- return reinterpret_cast<const std::type_info *>(ptr);
- }
- #ifdef __ARM_EABI_UNWINDER__
- // The ABI provides a routine for matching exception object types.
- typedef _Unwind_Control_Block _throw_typet;
- #define get_adjusted_ptr(catch_type, throw_type, thrown_ptr_p) \
- (__cxa_type_match (throw_type, catch_type, false, thrown_ptr_p) \
- != ctm_failed)
- // Return true if THROW_TYPE matches one if the filter types.
- static bool
- check_exception_spec(lsda_header_info* info, _throw_typet* throw_type,
- void* thrown_ptr, _sleb128_t filter_value)
- {
- const _uleb128_t* e = ((const _uleb128_t*) info->TType)
- - filter_value - 1;
- while (1)
- {
- const std::type_info* catch_type;
- _uleb128_t tmp;
- tmp = *e;
-
- // Zero signals the end of the list. If we've not found
- // a match by now, then we've failed the specification.
- if (tmp == 0)
- return false;
- tmp = _Unwind_decode_typeinfo_ptr(info->ttype_base, (_Unwind_Word) e);
- // Match a ttype entry.
- catch_type = reinterpret_cast<const std::type_info*>(tmp);
- // ??? There is currently no way to ask the RTTI code about the
- // relationship between two types without reference to a specific
- // object. There should be; then we wouldn't need to mess with
- // thrown_ptr here.
- if (get_adjusted_ptr(catch_type, throw_type, &thrown_ptr))
- return true;
- // Advance to the next entry.
- e++;
- }
- }
- // Save stage1 handler information in the exception object
- static inline void
- save_caught_exception(struct _Unwind_Exception* ue_header,
- struct _Unwind_Context* context,
- void* thrown_ptr,
- int handler_switch_value,
- const unsigned char* language_specific_data,
- _Unwind_Ptr landing_pad,
- const unsigned char* action_record
- __attribute__((__unused__)))
- {
- ue_header->barrier_cache.sp = _Unwind_GetGR(context, UNWIND_STACK_REG);
- ue_header->barrier_cache.bitpattern[0] = (_uw) thrown_ptr;
- ue_header->barrier_cache.bitpattern[1]
- = (_uw) handler_switch_value;
- ue_header->barrier_cache.bitpattern[2]
- = (_uw) language_specific_data;
- ue_header->barrier_cache.bitpattern[3] = (_uw) landing_pad;
- }
- // Restore the catch handler data saved during phase1.
- static inline void
- restore_caught_exception(struct _Unwind_Exception* ue_header,
- int& handler_switch_value,
- const unsigned char*& language_specific_data,
- _Unwind_Ptr& landing_pad)
- {
- handler_switch_value = (int) ue_header->barrier_cache.bitpattern[1];
- language_specific_data =
- (const unsigned char*) ue_header->barrier_cache.bitpattern[2];
- landing_pad = (_Unwind_Ptr) ue_header->barrier_cache.bitpattern[3];
- }
- #define CONTINUE_UNWINDING \
- do \
- { \
- if (__gnu_unwind_frame(ue_header, context) != _URC_OK) \
- return _URC_FAILURE; \
- return _URC_CONTINUE_UNWIND; \
- } \
- while (0)
- // Return true if the filter spec is empty, ie throw().
- static bool
- empty_exception_spec (lsda_header_info *info, _Unwind_Sword filter_value)
- {
- const _Unwind_Word* e = ((const _Unwind_Word*) info->TType)
- - filter_value - 1;
- return *e == 0;
- }
- #else
- typedef const std::type_info _throw_typet;
- // Given the thrown type THROW_TYPE, pointer to a variable containing a
- // pointer to the exception object THROWN_PTR_P and a type CATCH_TYPE to
- // compare against, return whether or not there is a match and if so,
- // update *THROWN_PTR_P.
- static bool
- get_adjusted_ptr (const std::type_info *catch_type,
- const std::type_info *throw_type,
- void **thrown_ptr_p)
- {
- void *thrown_ptr = *thrown_ptr_p;
- // Pointer types need to adjust the actual pointer, not
- // the pointer to pointer that is the exception object.
- // This also has the effect of passing pointer types
- // "by value" through the __cxa_begin_catch return value.
- if (throw_type->__is_pointer_p ())
- thrown_ptr = *(void **) thrown_ptr;
- if (catch_type->__do_catch (throw_type, &thrown_ptr, 1))
- {
- *thrown_ptr_p = thrown_ptr;
- return true;
- }
- return false;
- }
- // Return true if THROW_TYPE matches one if the filter types.
- static bool
- check_exception_spec(lsda_header_info* info, _throw_typet* throw_type,
- void* thrown_ptr, _sleb128_t filter_value)
- {
- const unsigned char *e = info->TType - filter_value - 1;
- while (1)
- {
- const std::type_info *catch_type;
- _uleb128_t tmp;
- e = read_uleb128 (e, &tmp);
- // Zero signals the end of the list. If we've not found
- // a match by now, then we've failed the specification.
- if (tmp == 0)
- return false;
- // Match a ttype entry.
- catch_type = get_ttype_entry (info, tmp);
- // ??? There is currently no way to ask the RTTI code about the
- // relationship between two types without reference to a specific
- // object. There should be; then we wouldn't need to mess with
- // thrown_ptr here.
- if (get_adjusted_ptr (catch_type, throw_type, &thrown_ptr))
- return true;
- }
- }
- // Save stage1 handler information in the exception object
- static inline void
- save_caught_exception(struct _Unwind_Exception* ue_header,
- struct _Unwind_Context* context
- __attribute__((__unused__)),
- void* thrown_ptr,
- int handler_switch_value,
- const unsigned char* language_specific_data,
- _Unwind_Ptr landing_pad __attribute__((__unused__)),
- const unsigned char* action_record)
- {
- __cxa_exception* xh = __get_exception_header_from_ue(ue_header);
- xh->handlerSwitchValue = handler_switch_value;
- xh->actionRecord = action_record;
- xh->languageSpecificData = language_specific_data;
- xh->adjustedPtr = thrown_ptr;
- // ??? Completely unknown what this field is supposed to be for.
- // ??? Need to cache TType encoding base for call_unexpected.
- xh->catchTemp = landing_pad;
- }
- // Restore the catch handler information saved during phase1.
- static inline void
- restore_caught_exception(struct _Unwind_Exception* ue_header,
- int& handler_switch_value,
- const unsigned char*& language_specific_data,
- _Unwind_Ptr& landing_pad)
- {
- __cxa_exception* xh = __get_exception_header_from_ue(ue_header);
- handler_switch_value = xh->handlerSwitchValue;
- language_specific_data = xh->languageSpecificData;
- landing_pad = (_Unwind_Ptr) xh->catchTemp;
- }
- #define CONTINUE_UNWINDING return _URC_CONTINUE_UNWIND
- // Return true if the filter spec is empty, ie throw().
- static bool
- empty_exception_spec (lsda_header_info *info, _Unwind_Sword filter_value)
- {
- const unsigned char *e = info->TType - filter_value - 1;
- _uleb128_t tmp;
- e = read_uleb128 (e, &tmp);
- return tmp == 0;
- }
- #endif // !__ARM_EABI_UNWINDER__
- namespace __cxxabiv1
- {
- // Using a different personality function name causes link failures
- // when trying to mix code using different exception handling models.
- #ifdef __USING_SJLJ_EXCEPTIONS__
- #define PERSONALITY_FUNCTION __gxx_personality_sj0
- #define __builtin_eh_return_data_regno(x) x
- #elif defined(__SEH__)
- #define PERSONALITY_FUNCTION __gxx_personality_imp
- #else
- #define PERSONALITY_FUNCTION __gxx_personality_v0
- #endif
- #if defined (__SEH__) && !defined (__USING_SJLJ_EXCEPTIONS__)
- static
- #else
- extern "C"
- #endif
- _Unwind_Reason_Code
- #ifdef __ARM_EABI_UNWINDER__
- __attribute__((target ("general-regs-only")))
- PERSONALITY_FUNCTION (_Unwind_State state,
- struct _Unwind_Exception* ue_header,
- struct _Unwind_Context* context)
- #else
- PERSONALITY_FUNCTION (int version,
- _Unwind_Action actions,
- _Unwind_Exception_Class exception_class,
- struct _Unwind_Exception *ue_header,
- struct _Unwind_Context *context)
- #endif
- {
- enum found_handler_type
- {
- found_nothing,
- found_terminate,
- found_cleanup,
- found_handler
- } found_type;
- lsda_header_info info;
- const unsigned char *language_specific_data;
- const unsigned char *action_record;
- const unsigned char *p;
- _Unwind_Ptr landing_pad, ip;
- int handler_switch_value;
- void* thrown_ptr = 0;
- bool foreign_exception;
- int ip_before_insn = 0;
- #ifdef __ARM_EABI_UNWINDER__
- _Unwind_Action actions;
- switch (state & _US_ACTION_MASK)
- {
- case _US_VIRTUAL_UNWIND_FRAME:
- // If the unwind state pattern is
- // _US_VIRTUAL_UNWIND_FRAME | _US_FORCE_UNWIND
- // then we don't need to search for any handler as it is not a real
- // exception. Just unwind the stack.
- if (state & _US_FORCE_UNWIND)
- CONTINUE_UNWINDING;
- actions = _UA_SEARCH_PHASE;
- break;
- case _US_UNWIND_FRAME_STARTING:
- actions = _UA_CLEANUP_PHASE;
- if (!(state & _US_FORCE_UNWIND)
- && ue_header->barrier_cache.sp == _Unwind_GetGR(context,
- UNWIND_STACK_REG))
- actions |= _UA_HANDLER_FRAME;
- break;
- case _US_UNWIND_FRAME_RESUME:
- CONTINUE_UNWINDING;
- break;
- default:
- std::abort();
- }
- actions |= state & _US_FORCE_UNWIND;
- // We don't know which runtime we're working with, so can't check this.
- // However the ABI routines hide this from us, and we don't actually need
- // to know.
- foreign_exception = false;
- // The dwarf unwinder assumes the context structure holds things like the
- // function and LSDA pointers. The ARM implementation caches these in
- // the exception header (UCB). To avoid rewriting everything we make a
- // virtual scratch register point at the UCB.
- ip = (_Unwind_Ptr) ue_header;
- _Unwind_SetGR(context, UNWIND_POINTER_REG, ip);
- #else
- __cxa_exception* xh = __get_exception_header_from_ue(ue_header);
- // Interface version check.
- if (version != 1)
- return _URC_FATAL_PHASE1_ERROR;
- foreign_exception = !__is_gxx_exception_class(exception_class);
- #endif
- // Shortcut for phase 2 found handler for domestic exception.
- if (actions == (_UA_CLEANUP_PHASE | _UA_HANDLER_FRAME)
- && !foreign_exception)
- {
- restore_caught_exception(ue_header, handler_switch_value,
- language_specific_data, landing_pad);
- found_type = (landing_pad == 0 ? found_terminate : found_handler);
- goto install_context;
- }
- language_specific_data = (const unsigned char *)
- _Unwind_GetLanguageSpecificData (context);
- // If no LSDA, then there are no handlers or cleanups.
- if (! language_specific_data)
- CONTINUE_UNWINDING;
- // Parse the LSDA header.
- p = parse_lsda_header (context, language_specific_data, &info);
- info.ttype_base = base_of_encoded_value (info.ttype_encoding, context);
- #ifdef _GLIBCXX_HAVE_GETIPINFO
- ip = _Unwind_GetIPInfo (context, &ip_before_insn);
- #else
- ip = _Unwind_GetIP (context);
- #endif
- if (! ip_before_insn)
- --ip;
- landing_pad = 0;
- action_record = 0;
- handler_switch_value = 0;
- #ifdef __USING_SJLJ_EXCEPTIONS__
- // The given "IP" is an index into the call-site table, with two
- // exceptions -- -1 means no-action, and 0 means terminate. But
- // since we're using uleb128 values, we've not got random access
- // to the array.
- if ((int) ip < 0)
- return _URC_CONTINUE_UNWIND;
- else if (ip == 0)
- {
- // Fall through to set found_terminate.
- }
- else
- {
- _uleb128_t cs_lp, cs_action;
- do
- {
- p = read_uleb128 (p, &cs_lp);
- p = read_uleb128 (p, &cs_action);
- }
- while (--ip);
- // Can never have null landing pad for sjlj -- that would have
- // been indicated by a -1 call site index.
- landing_pad = cs_lp + 1;
- if (cs_action)
- action_record = info.action_table + cs_action - 1;
- goto found_something;
- }
- #else
- // Search the call-site table for the action associated with this IP.
- while (p < info.action_table)
- {
- _Unwind_Ptr cs_start, cs_len, cs_lp;
- _uleb128_t cs_action;
- // Note that all call-site encodings are "absolute" displacements.
- p = read_encoded_value (0, info.call_site_encoding, p, &cs_start);
- p = read_encoded_value (0, info.call_site_encoding, p, &cs_len);
- p = read_encoded_value (0, info.call_site_encoding, p, &cs_lp);
- p = read_uleb128 (p, &cs_action);
- // The table is sorted, so if we've passed the ip, stop.
- if (ip < info.Start + cs_start)
- p = info.action_table;
- else if (ip < info.Start + cs_start + cs_len)
- {
- if (cs_lp)
- landing_pad = info.LPStart + cs_lp;
- if (cs_action)
- action_record = info.action_table + cs_action - 1;
- goto found_something;
- }
- }
- #endif // __USING_SJLJ_EXCEPTIONS__
- // If ip is not present in the table, call terminate. This is for
- // a destructor inside a cleanup, or a library routine the compiler
- // was not expecting to throw.
- found_type = found_terminate;
- goto do_something;
- found_something:
- if (landing_pad == 0)
- {
- // If ip is present, and has a null landing pad, there are
- // no cleanups or handlers to be run.
- found_type = found_nothing;
- }
- else if (action_record == 0)
- {
- // If ip is present, has a non-null landing pad, and a null
- // action table offset, then there are only cleanups present.
- // Cleanups use a zero switch value, as set above.
- found_type = found_cleanup;
- }
- else
- {
- // Otherwise we have a catch handler or exception specification.
- _sleb128_t ar_filter, ar_disp;
- const std::type_info* catch_type;
- _throw_typet* throw_type;
- bool saw_cleanup = false;
- bool saw_handler = false;
- #ifdef __ARM_EABI_UNWINDER__
- // ??? How does this work - more importantly, how does it interact with
- // dependent exceptions?
- throw_type = ue_header;
- if (actions & _UA_FORCE_UNWIND)
- {
- __GXX_INIT_FORCED_UNWIND_CLASS(ue_header->exception_class);
- }
- else if (!foreign_exception)
- thrown_ptr = __get_object_from_ue (ue_header);
- #else
- #if __cpp_rtti
- // During forced unwinding, match a magic exception type.
- if (actions & _UA_FORCE_UNWIND)
- {
- throw_type = &typeid(abi::__forced_unwind);
- }
- // With a foreign exception class, there's no exception type.
- // ??? What to do about GNU Java and GNU Ada exceptions?
- else if (foreign_exception)
- {
- throw_type = &typeid(abi::__foreign_exception);
- }
- else
- #endif
- {
- thrown_ptr = __get_object_from_ue (ue_header);
- throw_type = __get_exception_header_from_obj
- (thrown_ptr)->exceptionType;
- }
- #endif
- while (1)
- {
- p = action_record;
- p = read_sleb128 (p, &ar_filter);
- read_sleb128 (p, &ar_disp);
- if (ar_filter == 0)
- {
- // Zero filter values are cleanups.
- saw_cleanup = true;
- }
- else if (ar_filter > 0)
- {
- // Positive filter values are handlers.
- catch_type = get_ttype_entry (&info, ar_filter);
- // Null catch type is a catch-all handler; we can catch foreign
- // exceptions with this. Otherwise we must match types.
- if (! catch_type
- || (throw_type
- && get_adjusted_ptr (catch_type, throw_type,
- &thrown_ptr)))
- {
- saw_handler = true;
- break;
- }
- }
- else
- {
- // Negative filter values are exception specifications.
- // ??? How do foreign exceptions fit in? As far as I can
- // see we can't match because there's no __cxa_exception
- // object to stuff bits in for __cxa_call_unexpected to use.
- // Allow them iff the exception spec is non-empty. I.e.
- // a throw() specification results in __unexpected.
- if ((throw_type
- && !(actions & _UA_FORCE_UNWIND)
- && !foreign_exception)
- ? ! check_exception_spec (&info, throw_type, thrown_ptr,
- ar_filter)
- : empty_exception_spec (&info, ar_filter))
- {
- saw_handler = true;
- break;
- }
- }
- if (ar_disp == 0)
- break;
- action_record = p + ar_disp;
- }
- if (saw_handler)
- {
- handler_switch_value = ar_filter;
- found_type = found_handler;
- }
- else
- found_type = (saw_cleanup ? found_cleanup : found_nothing);
- }
- do_something:
- if (found_type == found_nothing)
- CONTINUE_UNWINDING;
- if (actions & _UA_SEARCH_PHASE)
- {
- if (found_type == found_cleanup)
- CONTINUE_UNWINDING;
- // For domestic exceptions, we cache data from phase 1 for phase 2.
- if (!foreign_exception)
- {
- save_caught_exception(ue_header, context, thrown_ptr,
- handler_switch_value, language_specific_data,
- landing_pad, action_record);
- }
- return _URC_HANDLER_FOUND;
- }
- install_context:
-
- // We can't use any of the cxa routines with foreign exceptions,
- // because they all expect ue_header to be a struct __cxa_exception.
- // So in that case, call terminate or unexpected directly.
- if ((actions & _UA_FORCE_UNWIND)
- || foreign_exception)
- {
- if (found_type == found_terminate)
- std::terminate ();
- else if (handler_switch_value < 0)
- {
- #pragma GCC diagnostic push
- #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
- __try
- { std::unexpected (); }
- __catch(...)
- { std::terminate (); }
- #pragma GCC diagnostic pop
- }
- }
- else
- {
- if (found_type == found_terminate)
- __cxa_call_terminate(ue_header);
- // Cache the TType base value for __cxa_call_unexpected, as we won't
- // have an _Unwind_Context then.
- if (handler_switch_value < 0)
- {
- parse_lsda_header (context, language_specific_data, &info);
- info.ttype_base = base_of_encoded_value (info.ttype_encoding,
- context);
- #ifdef __ARM_EABI_UNWINDER__
- const _Unwind_Word* e;
- _Unwind_Word n;
-
- e = ((const _Unwind_Word*) info.TType) - handler_switch_value - 1;
- // Count the number of rtti objects.
- n = 0;
- while (e[n] != 0)
- n++;
- // Count.
- ue_header->barrier_cache.bitpattern[1] = n;
- // Base
- ue_header->barrier_cache.bitpattern[2] = info.ttype_base;
- // Stride.
- ue_header->barrier_cache.bitpattern[3] = 4;
- // List head.
- ue_header->barrier_cache.bitpattern[4] = (_Unwind_Word) e;
- #else
- xh->catchTemp = base_of_encoded_value (info.ttype_encoding, context);
- #endif
- }
- }
- /* For targets with pointers smaller than the word size, we must extend the
- pointer, and this extension is target dependent. */
- _Unwind_SetGR (context, __builtin_eh_return_data_regno (0),
- __builtin_extend_pointer (ue_header));
- _Unwind_SetGR (context, __builtin_eh_return_data_regno (1),
- handler_switch_value);
- _Unwind_SetIP (context, landing_pad);
- #ifdef __ARM_EABI_UNWINDER__
- if (found_type == found_cleanup)
- __cxa_begin_cleanup(ue_header);
- #endif
- return _URC_INSTALL_CONTEXT;
- }
- /* The ARM EABI implementation of __cxa_call_unexpected is in a
- different file so that the personality routine (PR) can be used
- standalone. The generic routine shared datastructures with the PR
- so it is most convenient to implement it here. */
- #ifndef __ARM_EABI_UNWINDER__
- extern "C" void
- __cxa_call_unexpected (void *exc_obj_in)
- {
- _Unwind_Exception *exc_obj
- = reinterpret_cast <_Unwind_Exception *>(exc_obj_in);
- __cxa_begin_catch (exc_obj);
- // This function is a handler for our exception argument. If we exit
- // by throwing a different exception, we'll need the original cleaned up.
- struct end_catch_protect
- {
- end_catch_protect() { }
- ~end_catch_protect() { __cxa_end_catch(); }
- } end_catch_protect_obj;
- lsda_header_info info;
- __cxa_exception *xh = __get_exception_header_from_ue (exc_obj);
- const unsigned char *xh_lsda;
- _Unwind_Sword xh_switch_value;
- std::terminate_handler xh_terminate_handler;
- // If the unexpectedHandler rethrows the exception (e.g. to categorize it),
- // it will clobber data about the current handler. So copy the data out now.
- xh_lsda = xh->languageSpecificData;
- xh_switch_value = xh->handlerSwitchValue;
- xh_terminate_handler = xh->terminateHandler;
- info.ttype_base = (_Unwind_Ptr) xh->catchTemp;
- __try
- { __unexpected (xh->unexpectedHandler); }
- __catch(...)
- {
- // Get the exception thrown from unexpected.
- __cxa_eh_globals *globals = __cxa_get_globals_fast ();
- __cxa_exception *new_xh = globals->caughtExceptions;
- void *new_ptr = __get_object_from_ambiguous_exception (new_xh);
- // We don't quite have enough stuff cached; re-parse the LSDA.
- parse_lsda_header (0, xh_lsda, &info);
- // If this new exception meets the exception spec, allow it.
- if (check_exception_spec (&info, __get_exception_header_from_obj
- (new_ptr)->exceptionType,
- new_ptr, xh_switch_value))
- { __throw_exception_again; }
- // If the exception spec allows std::bad_exception, throw that.
- // We don't have a thrown object to compare against, but since
- // bad_exception doesn't have virtual bases, that's OK; just pass 0.
- #if __cpp_exceptions && __cpp_rtti
- const std::type_info &bad_exc = typeid (std::bad_exception);
- if (check_exception_spec (&info, &bad_exc, 0, xh_switch_value))
- throw std::bad_exception();
- #endif
- // Otherwise, die.
- __terminate (xh_terminate_handler);
- }
- }
- #endif
- #if defined (__SEH__) && !defined (__USING_SJLJ_EXCEPTIONS__)
- extern "C"
- EXCEPTION_DISPOSITION
- __gxx_personality_seh0 (PEXCEPTION_RECORD ms_exc, void *this_frame,
- PCONTEXT ms_orig_context, PDISPATCHER_CONTEXT ms_disp)
- {
- return _GCC_specific_handler (ms_exc, this_frame, ms_orig_context,
- ms_disp, __gxx_personality_imp);
- }
- #endif /* SEH */
- } // namespace __cxxabiv1
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