c4d1fecc10
Also clean up cpplint.py-detected lint. Change-Id: Ia18e89c4c6878764f8d7ed34b8247e7a8d8fe88b
72 lines
2.6 KiB
C++
72 lines
2.6 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <unwind.h>
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#include <sys/types.h>
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// =============================================================================
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// stack trace functions
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// =============================================================================
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struct stack_crawl_state_t {
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size_t count;
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intptr_t* addrs;
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};
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/* depends how the system includes define this */
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#ifdef HAVE_UNWIND_CONTEXT_STRUCT
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typedef struct _Unwind_Context __unwind_context;
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#else
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typedef _Unwind_Context __unwind_context;
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#endif
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static _Unwind_Reason_Code trace_function(__unwind_context* context, void* arg) {
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stack_crawl_state_t* state = static_cast<stack_crawl_state_t*>(arg);
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if (state->count) {
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intptr_t ip = (intptr_t)_Unwind_GetIP(context);
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if (ip) {
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state->addrs[0] = ip;
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state->addrs++;
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state->count--;
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return _URC_NO_REASON;
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}
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}
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/*
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* If we run out of space to record the address or 0 has been seen, stop
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* unwinding the stack.
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*/
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return _URC_END_OF_STACK;
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}
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__LIBC_HIDDEN__ int get_backtrace(intptr_t* addrs, size_t max_entries) {
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stack_crawl_state_t state;
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state.count = max_entries;
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state.addrs = addrs;
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_Unwind_Backtrace(trace_function, &state);
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return max_entries - state.count;
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}
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