174 lines
4.5 KiB
C++
174 lines
4.5 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2010-2018 Danny Robson <danny@nerdcruft.net>
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*/
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#include "backtrace.hpp"
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#include "debug.hpp"
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#include "log.hpp"
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#include <cruft/util/preprocessor.hpp>
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#include <cstdlib>
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#include <iostream>
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using namespace cruft::debug;
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////////////////////////////////////////////////////////////////////////////////
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void
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cruft::debug::detail::panic (const char *msg)
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{
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std::cerr << "PANIC: " << msg << "\n" << ::debug::backtrace () << std::endl;
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breakpoint ();
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abort ();
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}
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////////////////////////////////////////////////////////////////////////////////
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void
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cruft::debug::detail::not_implemented (const char *msg)
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{
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panic (msg);
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}
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//-----------------------------------------------------------------------------
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void
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cruft::debug::detail::unreachable (const char *msg)
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{
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panic (msg);
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}
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////////////////////////////////////////////////////////////////////////////////
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void
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warn (void)
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{
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warn ("Unusual code path found.");
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}
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//-----------------------------------------------------------------------------
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void
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warn (const std::string &msg)
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{
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warn (msg.c_str ());
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}
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//-----------------------------------------------------------------------------
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void
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warn (const char *msg)
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{
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LOG_WARN (msg);
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}
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////////////////////////////////////////////////////////////////////////////////
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static void abort_with_trace (void)
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{
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// Manually trigger a breakpoint if possible so that the debugger won't
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// silently dump us some place without further information.
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// eg, CLion/GDB/Win32 silently dropping us out of the session.
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breakpoint ();
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// If this is because of an exception we may as well rethrow and hope that
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// the system will print exception data during the abort process.
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//
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// But we can at least try to print anything derived from std::exception
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// (which is a likely guess) before we self-destruct.
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if (auto ptr = std::current_exception (); ptr) {
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try {
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std::rethrow_exception (ptr);
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} catch (std::exception const &x) {
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LOG_EMERGENCY ("unhandled exception: %!\n%!", x.what (), debug::backtrace {});
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} catch (...) {
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LOG_EMERGENCY ("unhandled exception: %!\n", debug::backtrace {});
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}
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} else {
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LOG_EMERGENCY ("aborting: %!", debug::backtrace {});
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}
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std::abort ();
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}
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//-----------------------------------------------------------------------------
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void
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cruft::debug::init [[gnu::constructor]] (void)
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{
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std::set_terminate (abort_with_trace);
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if (!debug_enabled && !getenv ("DEBUG"))
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return;
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LOG_DEBUG ("setting debug environment");
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//enable_fpe ();
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force_console ();
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prepare_debugger ();
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if (getenv ("DEBUG_WAIT"))
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await_debugger ();
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}
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///////////////////////////////////////////////////////////////////////////////
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static void
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debug_wait [[gnu::constructor]] (void)
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{
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if (auto val = getenv ("DEBUG_WAIT")) {
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LOG_NOTICE ("awaiting debugger");
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if (std::string ("0") != val)
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await_debugger ();
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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template <>
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bool
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cruft::debug::validator<float>::is_valid (const float &val) noexcept
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{
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return !std::isnan (val);
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}
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//-----------------------------------------------------------------------------
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template <>
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bool
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cruft::debug::validator<double>::is_valid (const double &val) noexcept
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{
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return !std::isnan (val);
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}
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///////////////////////////////////////////////////////////////////////////////
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#include "std.hpp"
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//-----------------------------------------------------------------------------
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#define INSTANTIATE(KLASS) \
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template <> \
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struct cruft::debug::validator<KLASS> { \
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static bool is_valid(KLASS const&); \
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}; \
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\
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bool \
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cruft::debug::validator<KLASS>::is_valid(KLASS const&) \
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{ \
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return true; \
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}
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//-----------------------------------------------------------------------------
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MAP0(INSTANTIATE,
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u08, u16, u32, u64,
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i08, i16, i32, i64,
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char
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)
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