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/* Icinga 2 | (c) 2020 Icinga GmbH | GPLv2+ */
#include <base/i2-base.hpp>
#include "base/stacktrace.hpp"
#include <iostream>
#include <iomanip>
#include <vector>
#ifdef HAVE_BACKTRACE_SYMBOLS
# include <execinfo.h>
#endif /* HAVE_BACKTRACE_SYMBOLS */
using namespace icinga;
std::ostream &icinga::operator<<(std::ostream &os, const StackTraceFormatter &f)
{
/* In most cases, this operator<< just relies on the operator<< for the `boost::stacktrace::stacktrace` wrapped in
* the `StackTraceFormatter`. But as this operator turned out to not work properly on some platforms, there is a
* fallback implementation that can be enabled using the `-DICINGA2_STACKTRACE_USE_BACKTRACE_SYMBOLS` flag at
* compile time. This will then switch to `backtrace_symbols()` from `<execinfo.h>` instead of the implementation
* provided by Boost.
*/
const boost::stacktrace::stacktrace &stack = f.m_Stack;
#ifdef ICINGA2_STACKTRACE_USE_BACKTRACE_SYMBOLS
std::vector<void *> addrs;
addrs.reserve(stack.size());
std::transform(stack.begin(), stack.end(), std::back_inserter(addrs), [](const boost::stacktrace::frame &f) {
return const_cast<void *>(f.address());
});
char **symbols = backtrace_symbols(addrs.data(), addrs.size());
for (size_t i = 0; i < addrs.size(); i++) {
os << std::setw(2) << i << "# " << symbols[i] << std::endl;
}
std::free(symbols);
#else /* ICINGA2_STACKTRACE_USE_BACKTRACE_SYMBOLS */
os << stack;
#endif /* ICINGA2_STACKTRACE_USE_BACKTRACE_SYMBOLS */
return os;
}
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