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/*
* Copyright (c) 2013, Ford Motor Company
* 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 the Ford Motor Company 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 HOLDER 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 "utils/back_trace.h"
#include <algorithm>
#include <vector>
#include <sstream>
#include <cxxabi.h>
#include <execinfo.h>
#include "utils/macro.h"
using std::ostream;
using std::string;
using std::vector;
using threads::Thread;
namespace utils {
namespace {
string demangle(const char* symbol) {
char temp[2048];
if (1 == sscanf(symbol, "%*[^(]%*[^_]%2047[^)+]", temp)) {
size_t size;
int32_t status;
char* demangled = abi::__cxa_demangle(temp, NULL, &size, &status);
if (demangled != NULL) {
string result(demangled);
free(demangled);
return result;
}
}
return symbol;
}
}
Backtrace::Backtrace(int32_t count, int32_t skip_top)
: thread_id_(threads::Thread::CurrentId()) {
int32_t skip = skip_top + 1; // Skip this constructor
vector<void*> full_trace (count + skip);
int32_t captured = backtrace(&full_trace.front(), count + skip);
int32_t first_call = std::min(captured, skip);
int32_t last_call = std::min(first_call + count, captured);
backtrace_.assign(full_trace.begin() + first_call, full_trace.begin() + last_call);
}
Backtrace::~Backtrace() {
}
vector<string> Backtrace::CallStack() const {
vector<string> callstack;
callstack.reserve(backtrace_.size());
char** mangled = backtrace_symbols(&backtrace_.front(), backtrace_.size());
for (size_t i = 0; i != backtrace_.size(); ++i) {
callstack.push_back(demangle(mangled[i]));
}
free(mangled);
return callstack;
}
threads::PlatformThreadHandle Backtrace::ThreadId() const {
return thread_id_;
}
ostream& operator<< (ostream& os, const Backtrace& bt) {
const vector<string> symbols = bt.CallStack();
os<<"Stack trace ("<<bt.ThreadId()<<")\n";
if (symbols.empty()) {
os<<"Not available"<<std::endl;
} else for (size_t i = 0; i < symbols.size(); ++i) {
os<<symbols[i]<<std::endl;
}
return os;
}
} // namespace utils
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