184 lines
4.3 KiB
C++
184 lines
4.3 KiB
C++
/*
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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
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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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
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* 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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*/
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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 "platform.hpp"
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#include <cstdlib>
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#include <iostream>
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using namespace std;
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//------------------------------------------------------------------------------
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void
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panic (const std::string& what) {
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cerr << "PANIC: " << what << "\n" << debug::backtrace () << endl;
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breakpoint ();
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abort ();
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}
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void
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panic (void)
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{ panic ("NFI"); }
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//------------------------------------------------------------------------------
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#if defined(PLATFORM_WIN32)
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#include <windows.h>
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void
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breakpoint (void) {
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DebugBreak ();
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}
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#else
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void
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breakpoint (void) {
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#if defined (__x86_64) || defined (__i386)
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__asm__ ("int $3;");
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#else
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raise (SIGINT);
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#endif
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}
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#endif
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//------------------------------------------------------------------------------
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void
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not_implemented (void) {
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not_implemented ("Function not implemented");
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}
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void
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not_implemented (const char *msg)
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{ panic (msg); }
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//------------------------------------------------------------------------------
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void
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unreachable (void) {
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panic ("Unreachable code executed");
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}
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void
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unreachable (const std::string& what) {
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panic (" Unreachable code executed: " + what);
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}
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//------------------------------------------------------------------------------
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void
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unusual (void) {
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panic ("Unusual code path found.");
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}
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//------------------------------------------------------------------------------
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#if defined(PLATFORM_LINUX)
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#include <fenv.h>
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void
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enable_fpe (void) {
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feenableexcept (FE_DIVBYZERO | FE_INVALID);
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}
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void
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disable_fpe (void) {
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feenableexcept (0);
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}
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#else
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// contropfp is not defined supposedly due to a regression in GCC include behaviours.
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void
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enable_fpe (void) {
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LOG_WARN ("Non-Linux exception code is broken under current GCC.");
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// _clearfp();
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// unsigned int ignored;
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// _controlfp_s (&ignored, _MCW_EM, _MCW_EM);
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}
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void
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disable_fpe (void) {
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LOG_WARN ("Non-Linux exception code is broken under current GCC.");
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// _clearfp();
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// unsigned int ignored;
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// _controlfp_s (&ignored, 0, _MCW_EM);
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}
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#endif
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//------------------------------------------------------------------------------
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#if defined(PLATFORM_WIN32)
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#include <io.h>
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#include <fcntl.h>
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void
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force_console (void) {
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if (!AttachConsole (ATTACH_PARENT_PROCESS))
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return;
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auto out_handle = GetStdHandle (STD_OUTPUT_HANDLE);
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auto err_handle = GetStdHandle (STD_ERROR_HANDLE);
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auto in_handle = GetStdHandle (STD_INPUT_HANDLE);
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auto out_fd = _open_osfhandle (reinterpret_cast<intptr_t> (out_handle), _O_TEXT);
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auto err_fd = _open_osfhandle (reinterpret_cast<intptr_t> (err_handle), _O_TEXT);
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auto in_fd = _open_osfhandle (reinterpret_cast<intptr_t> (in_handle), _O_TEXT);
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auto out_file = _fdopen (out_fd, "w");
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auto err_file = _fdopen (err_fd, "w");
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auto in_file = _fdopen (in_fd, "r");
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/// FILE objects are not reassignable, but Windows doesn't leave us much
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/// choice here.
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*stdout = *out_file;
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*stderr = *err_file;
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*stdin = *in_file;
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setvbuf (stdout, NULL, _IONBF, 0);
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setvbuf (stderr, NULL, _IONBF, 0);
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setvbuf (stdin, NULL, _IONBF, 0);
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ios::sync_with_stdio ();
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// Windows doesn't give an immediate newline when an application is run
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// from a console, so we provide one here for sanity.
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std::cout << "\n";
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}
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#endif
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//------------------------------------------------------------------------------
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void
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debug::init (void) {
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#if defined(PLATFORM_WIN32)
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force_console ();
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if (nullptr == LoadLibrary("exchndl.dll")) {
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std::cerr << GetLastError () << "\n";
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LOG_WARNING("Emergency debugger not loaded");
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}
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#endif
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}
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