libcruft-util/debug.cpp

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/*
* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2010 Danny Robson <danny@nerdcruft.net>
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*/
#include "debug.hpp"
#include "backtrace.hpp"
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#include "log.hpp"
#include "platform.hpp"
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#include <cstdlib>
#include <iostream>
using namespace std;
//------------------------------------------------------------------------------
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void
panic (const std::string& what) {
cerr << "PANIC: " << what << "\n" << debug::backtrace () << endl;
breakpoint ();
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abort ();
}
void
panic (void)
{ panic ("NFI"); }
//------------------------------------------------------------------------------
#if defined(PLATFORM_WIN32)
#include <windows.h>
void
breakpoint (void) {
DebugBreak ();
}
#else
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void
breakpoint (void) {
#if defined (__x86_64) || defined (__i386)
__asm__ ("int $3;");
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#else
raise (SIGINT);
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#endif
}
#endif
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//------------------------------------------------------------------------------
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void
not_implemented (void) {
static const char *MSG = "Function not implemented";
not_implemented (MSG);
}
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void
not_implemented (const char *msg)
{ panic (msg); }
//------------------------------------------------------------------------------
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void
unreachable (void) {
panic ("Unreachable code executed");
}
void
unreachable (const std::string& what) {
panic (" Unreachable code executed: " + what);
}
//------------------------------------------------------------------------------
void
unusual (void) {
panic ("Unusual code path found.");
}
//------------------------------------------------------------------------------
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#if defined(PLATFORM_LINUX)
#include <fenv.h>
void
enable_fpe (void) {
feenableexcept (FE_DIVBYZERO | FE_INVALID);
}
void
disable_fpe (void) {
feenableexcept (0);
}
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#else
// contropfp is not defined supposedly due to a regression in GCC include behaviours.
void
enable_fpe (void) {
LOG_WARN ("Non-Linux exception code is broken under current GCC.");
// _clearfp();
// unsigned int ignored;
// _controlfp_s (&ignored, _MCW_EM, _MCW_EM);
}
void
disable_fpe (void) {
LOG_WARN ("Non-Linux exception code is broken under current GCC.");
// _clearfp();
// unsigned int ignored;
// _controlfp_s (&ignored, 0, _MCW_EM);
}
#endif