/* libunwind - a platform-independent unwind library Copyright (C) 2003, 2005 Hewlett-Packard Co Contributed by David Mosberger-Tang <davidm@hpl.hp.com> This file is part of libunwind. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef unwind_internal_h #define unwind_internal_h #define UNW_LOCAL_ONLY #include <unwind.h> #include <stdlib.h> #include <libunwind.h> #include "libunwind_i.h" /* The version of the _Unwind_*() interface implemented by this code. */ #define _U_VERSION 1 typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn) (int, _Unwind_Action, uint64_t, struct _Unwind_Exception *, struct _Unwind_Context *); struct _Unwind_Context { unw_cursor_t cursor; int end_of_stack; /* set to 1 if the end of stack was reached */ }; /* This must be a macro because unw_getcontext() must be invoked from the callee, even if optimization (and hence inlining) is turned off. The macro arguments MUST NOT have any side-effects. */ #define _Unwind_InitContext(context, uc) \ ((context)->end_of_stack = 0, \ ((unw_getcontext (uc) < 0 || unw_init_local (&(context)->cursor, uc) < 0) \ ? -1 : 0)) static _Unwind_Reason_Code ALWAYS_INLINE _Unwind_Phase2 (struct _Unwind_Exception *exception_object, struct _Unwind_Context *context) { _Unwind_Stop_Fn stop = (_Unwind_Stop_Fn) exception_object->private_1; uint64_t exception_class = exception_object->exception_class; void *stop_parameter = (void *) exception_object->private_2; _Unwind_Personality_Fn personality; _Unwind_Reason_Code reason; _Unwind_Action actions; unw_proc_info_t pi; unw_word_t ip; int ret; actions = _UA_CLEANUP_PHASE; if (stop) actions |= _UA_FORCE_UNWIND; while (1) { ret = unw_step (&context->cursor); if (ret <= 0) { if (ret == 0) { actions |= _UA_END_OF_STACK; context->end_of_stack = 1; } else return _URC_FATAL_PHASE2_ERROR; } if (stop) { reason = (*stop) (_U_VERSION, actions, exception_class, exception_object, context, stop_parameter); if (reason != _URC_NO_REASON) /* Stop function may return _URC_FATAL_PHASE2_ERROR if it's unable to handle end-of-stack condition or _URC_FATAL_PHASE2_ERROR if something is wrong. Not that it matters: the resulting state is indeterminate anyhow so we must return _URC_FATAL_PHASE2_ERROR... */ return _URC_FATAL_PHASE2_ERROR; } if (context->end_of_stack || unw_get_proc_info (&context->cursor, &pi) < 0) return _URC_FATAL_PHASE2_ERROR; personality = (_Unwind_Personality_Fn) (uintptr_t) pi.handler; if (personality) { if (!stop) { if (unw_get_reg (&context->cursor, UNW_REG_IP, &ip) < 0) return _URC_FATAL_PHASE2_ERROR; if ((unsigned long) stop_parameter == ip) actions |= _UA_HANDLER_FRAME; } reason = (*personality) (_U_VERSION, actions, exception_class, exception_object, context); if (reason != _URC_CONTINUE_UNWIND) { if (reason == _URC_INSTALL_CONTEXT) { /* we may regain control via _Unwind_Resume() */ unw_resume (&context->cursor); abort (); } else return _URC_FATAL_PHASE2_ERROR; } if (actions & _UA_HANDLER_FRAME) /* The personality routine for the handler-frame changed it's mind; that's a no-no... */ abort (); } } return _URC_FATAL_PHASE2_ERROR; /* shouldn't be reached */ } #endif /* unwind_internal_h */