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