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Diffstat (limited to 'sysdeps/generic/unwind.inc')
| -rw-r--r-- | sysdeps/generic/unwind.inc | 309 |
1 files changed, 0 insertions, 309 deletions
diff --git a/sysdeps/generic/unwind.inc b/sysdeps/generic/unwind.inc deleted file mode 100644 index 7ec65e903b..0000000000 --- a/sysdeps/generic/unwind.inc +++ /dev/null @@ -1,309 +0,0 @@ -/* Exception handling and frame unwind runtime interface routines. -*- C -*- - Copyright (C) 2001 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 2, 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. - - You should have received a copy of the GNU General Public License - along with GCC; see the file COPYING. If not, write to the Free - Software Foundation, 59 Temple Place - Suite 330, Boston, MA - 02111-1307, USA. */ - -/* This is derived from the C++ ABI for IA-64. Where we diverge - for cross-architecture compatibility are noted with "@@@". - This file is included from unwind-dw2.c or unwind-ia64.c. */ - -/* Subroutine of _Unwind_RaiseException also invoked from _Unwind_Resume. - - Unwind the stack calling the personality routine to find both the - exception handler and intermediary cleanup code. We'll only locate - the first such frame here. Cleanup code will call back into - _Unwind_Resume and we'll continue Phase 2 there. */ - -static _Unwind_Reason_Code -_Unwind_RaiseException_Phase2(struct _Unwind_Exception *exc, - struct _Unwind_Context *context) -{ - _Unwind_Reason_Code code; - - while (1) - { - _Unwind_FrameState fs; - int match_handler; - - code = uw_frame_state_for (context, &fs); - - /* Identify when we've reached the designated handler context. */ - match_handler = (uw_identify_context (context) == exc->private_2 - ? _UA_HANDLER_FRAME : 0); - - if (code != _URC_NO_REASON) - /* Some error encountered. Usually the unwinder doesn't - diagnose these and merely crashes. */ - return _URC_FATAL_PHASE2_ERROR; - - /* Unwind successful. Run the personality routine, if any. */ - if (fs.personality) - { - code = (*fs.personality) (1, _UA_CLEANUP_PHASE | match_handler, - exc->exception_class, exc, context); - if (code == _URC_INSTALL_CONTEXT) - break; - if (code != _URC_CONTINUE_UNWIND) - return _URC_FATAL_PHASE2_ERROR; - } - - /* Don't let us unwind past the handler context. */ - if (match_handler) - abort (); - - uw_update_context (context, &fs); - } - - return code; -} - -/* Raise an exception, passing along the given exception object. */ -#ifndef _LIBC -_Unwind_Reason_Code -_Unwind_RaiseException(struct _Unwind_Exception *exc) -{ - struct _Unwind_Context this_context, cur_context; - _Unwind_Reason_Code code; - - /* Set up this_context to describe the current stack frame. */ - uw_init_context (&this_context); - cur_context = this_context; - - /* Phase 1: Search. Unwind the stack, calling the personality routine - with the _UA_SEARCH_PHASE flag set. Do not modify the stack yet. */ - while (1) - { - _Unwind_FrameState fs; - - /* Set up fs to describe the FDE for the caller of cur_context. The - first time through the loop, that means __cxa_throw. */ - code = uw_frame_state_for (&cur_context, &fs); - - if (code == _URC_END_OF_STACK) - /* Hit end of stack with no handler found. */ - return _URC_END_OF_STACK; - - if (code != _URC_NO_REASON) - /* Some error encountered. Ususally the unwinder doesn't - diagnose these and merely crashes. */ - return _URC_FATAL_PHASE1_ERROR; - - /* Unwind successful. Run the personality routine, if any. */ - if (fs.personality) - { - code = (*fs.personality) (1, _UA_SEARCH_PHASE, exc->exception_class, - exc, &cur_context); - if (code == _URC_HANDLER_FOUND) - break; - else if (code != _URC_CONTINUE_UNWIND) - return _URC_FATAL_PHASE1_ERROR; - } - - /* Update cur_context to describe the same frame as fs. */ - uw_update_context (&cur_context, &fs); - } - - /* Indicate to _Unwind_Resume and associated subroutines that this - is not a forced unwind. Further, note where we found a handler. */ - exc->private_1 = 0; - exc->private_2 = uw_identify_context (&cur_context); - - cur_context = this_context; - code = _Unwind_RaiseException_Phase2 (exc, &cur_context); - if (code != _URC_INSTALL_CONTEXT) - return code; - - uw_install_context (&this_context, &cur_context); -} -#endif - - -/* Subroutine of _Unwind_ForcedUnwind also invoked from _Unwind_Resume. */ - -static _Unwind_Reason_Code -_Unwind_ForcedUnwind_Phase2(struct _Unwind_Exception *exc, - struct _Unwind_Context *context) -{ - _Unwind_Stop_Fn stop = (_Unwind_Stop_Fn) (_Unwind_Ptr) exc->private_1; - void *stop_argument = (void *) (_Unwind_Ptr) exc->private_2; - _Unwind_Reason_Code code, stop_code; - - while (1) - { - _Unwind_FrameState fs; - int action; - - /* Set up fs to describe the FDE for the caller of cur_context. */ - code = uw_frame_state_for (context, &fs); - if (code != _URC_NO_REASON && code != _URC_END_OF_STACK) - return _URC_FATAL_PHASE2_ERROR; - - /* Unwind successful. */ - action = _UA_FORCE_UNWIND | _UA_CLEANUP_PHASE; - if (code == _URC_END_OF_STACK) - action |= _UA_END_OF_STACK; - stop_code = (*stop) (1, action, exc->exception_class, exc, - context, stop_argument); - if (stop_code != _URC_NO_REASON) - return _URC_FATAL_PHASE2_ERROR; - - /* Stop didn't want to do anything. Invoke the personality - handler, if applicable, to run cleanups. */ - if (code == _URC_END_OF_STACK) - break; - - if (fs.personality) - { - code = (*fs.personality) (1, _UA_FORCE_UNWIND | _UA_CLEANUP_PHASE, - exc->exception_class, exc, context); - if (code == _URC_INSTALL_CONTEXT) - break; - if (code != _URC_CONTINUE_UNWIND) - return _URC_FATAL_PHASE2_ERROR; - } - - /* Update cur_context to describe the same frame as fs. */ - uw_update_context (context, &fs); - } - - return code; -} - - -/* Raise an exception for forced unwinding. */ -#ifndef _LIBC -_Unwind_Reason_Code -_Unwind_ForcedUnwind (struct _Unwind_Exception *exc, - _Unwind_Stop_Fn stop, void * stop_argument) -{ - struct _Unwind_Context this_context, cur_context; - _Unwind_Reason_Code code; - - uw_init_context (&this_context); - cur_context = this_context; - - exc->private_1 = (_Unwind_Ptr) stop; - exc->private_2 = (_Unwind_Ptr) stop_argument; - - code = _Unwind_ForcedUnwind_Phase2 (exc, &cur_context); - if (code != _URC_INSTALL_CONTEXT) - return code; - - uw_install_context (&this_context, &cur_context); -} -#endif - - -/* Resume propagation of an existing exception. This is used after - e.g. executing cleanup code, and not to implement rethrowing. */ - -void -_Unwind_Resume (struct _Unwind_Exception *exc) -{ - struct _Unwind_Context this_context, cur_context; - _Unwind_Reason_Code code; - - uw_init_context (&this_context); - cur_context = this_context; - - /* Choose between continuing to process _Unwind_RaiseException - or _Unwind_ForcedUnwind. */ - if (exc->private_1 == 0) - code = _Unwind_RaiseException_Phase2 (exc, &cur_context); - else - code = _Unwind_ForcedUnwind_Phase2 (exc, &cur_context); - - if (code != _URC_INSTALL_CONTEXT) - abort (); - - uw_install_context (&this_context, &cur_context); -} - - -/* Resume propagation of an FORCE_UNWIND exception, or to rethrow - a normal exception that was handled. */ -#ifndef _LIBC -_Unwind_Reason_Code -_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *exc) -{ - struct _Unwind_Context this_context, cur_context; - _Unwind_Reason_Code code; - - /* Choose between continuing to process _Unwind_RaiseException - or _Unwind_ForcedUnwind. */ - if (exc->private_1 == 0) - return _Unwind_RaiseException (exc); - - uw_init_context (&this_context); - cur_context = this_context; - - code = _Unwind_ForcedUnwind_Phase2 (exc, &cur_context); - - if (code != _URC_INSTALL_CONTEXT) - abort (); - - uw_install_context (&this_context, &cur_context); -} -#endif - - -/* A convenience function that calls the exception_cleanup field. */ -#ifndef _LIBC -void -_Unwind_DeleteException (struct _Unwind_Exception *exc) -{ - if (exc->exception_cleanup) - (*exc->exception_cleanup) (_URC_FOREIGN_EXCEPTION_CAUGHT, exc); -} -#endif - - -/* Perform stack backtrace through unwind data. */ -#ifndef _LIBC -_Unwind_Reason_Code -_Unwind_Backtrace(_Unwind_Trace_Fn trace, void * trace_argument) -{ - struct _Unwind_Context context; - _Unwind_Reason_Code code; - - uw_init_context (&context); - - while (1) - { - _Unwind_FrameState fs; - - /* Set up fs to describe the FDE for the caller of context. */ - code = uw_frame_state_for (&context, &fs); - if (code != _URC_NO_REASON && code != _URC_END_OF_STACK) - return _URC_FATAL_PHASE1_ERROR; - - /* Call trace function. */ - if ((*trace) (&context, trace_argument) != _URC_NO_REASON) - return _URC_FATAL_PHASE1_ERROR; - - /* We're done at end of stack. */ - if (code == _URC_END_OF_STACK) - break; - - /* Update context to describe the same frame as fs. */ - uw_update_context (&context, &fs); - } - - return code; -} -#endif |