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103 lines
3.6 KiB
C
103 lines
3.6 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2003-2004 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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#include "unwind-internal.h"
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PROTECTED _Unwind_Reason_Code
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_Unwind_RaiseException (struct _Unwind_Exception *exception_object)
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{
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uint64_t exception_class = exception_object->exception_class;
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_Unwind_Personality_Fn personality;
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struct _Unwind_Context context;
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_Unwind_Reason_Code reason;
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unw_proc_info_t pi;
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unw_context_t uc;
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unw_word_t ip;
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int ret;
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Debug (1, "(exception_object=%p)\n", exception_object);
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if (_Unwind_InitContext (&context, &uc) < 0)
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return _URC_FATAL_PHASE1_ERROR;
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/* Phase 1 (search phase) */
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while (1)
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{
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if ((ret = unw_step (&context.cursor)) <= 0)
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{
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if (ret == 0)
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{
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Debug (1, "no handler found\n");
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return _URC_END_OF_STACK;
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}
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else
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return _URC_FATAL_PHASE1_ERROR;
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}
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if (unw_get_proc_info (&context.cursor, &pi) < 0)
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return _URC_FATAL_PHASE1_ERROR;
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personality = (_Unwind_Personality_Fn) (uintptr_t) pi.handler;
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if (personality)
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{
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reason = (*personality) (_U_VERSION, _UA_SEARCH_PHASE,
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exception_class, exception_object,
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&context);
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if (reason != _URC_CONTINUE_UNWIND)
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{
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if (reason == _URC_HANDLER_FOUND)
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break;
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else
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{
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Debug (1, "personality returned %d\n", reason);
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return _URC_FATAL_PHASE1_ERROR;
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}
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}
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}
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}
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/* Exceptions are associated with IP-ranges. If a given exception
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is handled at a particular IP, it will _always_ be handled at
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that IP. If this weren't true, we'd have to track the tuple
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(IP,SP,BSP) to uniquely identify the stack frame that's handling
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the exception. */
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if (unw_get_reg (&context.cursor, UNW_REG_IP, &ip) < 0)
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return _URC_FATAL_PHASE1_ERROR;
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exception_object->private_1 = 0; /* clear "stop" pointer */
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exception_object->private_2 = ip; /* save frame marker */
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Debug (1, "found handler for IP=%lx; entering cleanup phase\n", (long) ip);
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/* Reset the cursor to the first frame: */
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if (unw_init_local (&context.cursor, &uc) < 0)
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return _URC_FATAL_PHASE1_ERROR;
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return _Unwind_Phase2 (exception_object, &context);
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}
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_Unwind_Reason_Code
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__libunwind_Unwind_RaiseException (struct _Unwind_Exception *)
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ALIAS (_Unwind_RaiseException);
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