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BacktraceUnwind.cpp
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BacktraceUnwind.cpp
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/******************************************************************************
* Copyright (c) 2018, Hobu Inc. (info@hobu.co)
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Hobu, Inc. or Flaxen Geo Consulting nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/
#include "BacktraceImpl.hpp"
#include <string>
#define UNW_LOCAL_ONLY
#include <dlfcn.h>
#include <libunwind.h>
namespace pdal
{
Utils::BacktraceEntries Utils::backtraceImpl()
{
BacktraceEntries entries;
unw_cursor_t cursor;
unw_context_t context;
unw_getcontext(&context);
unw_init_local(&cursor, &context);
while (unw_step(&cursor) > 0)
{
unw_word_t val;
BacktraceEntry entry;
unw_get_reg(&cursor, UNW_REG_IP, &val);
if (val == 0)
break;
*(reinterpret_cast<unw_word_t *>(&entry.addr)) = val;
unw_word_t offset;
char sym[1000];
if (unw_get_proc_name(&cursor, sym, sizeof(sym), &offset) == 0)
{
entry.offset = (int)offset;
entry.symname = sym;
}
Dl_info info;
if (dladdr(entry.addr, &info))
entry.libname = info.dli_fname;
entries.push_back(entry);
}
return entries;
}
} // namespace pdal