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src/debug.cpp
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197
src/debug.cpp
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/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "porting.h"
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#include "debug.h"
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#include "exceptions.h"
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <map>
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#include <sstream>
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#include <thread>
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#include "threading/mutex_auto_lock.h"
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#include "config.h"
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#ifdef _MSC_VER
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#include <dbghelp.h>
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#include "version.h"
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#include "filesys.h"
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#endif
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#if USE_CURSES
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#include "terminal_chat_console.h"
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#endif
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/*
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Assert
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*/
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void sanity_check_fn(const char *assertion, const char *file,
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unsigned int line, const char *function)
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{
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#if USE_CURSES
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g_term_console.stopAndWaitforThread();
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#endif
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errorstream << std::endl << "In thread " << std::hex
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<< std::this_thread::get_id() << ":" << std::endl;
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errorstream << file << ":" << line << ": " << function
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<< ": An engine assumption '" << assertion << "' failed." << std::endl;
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abort();
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}
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void fatal_error_fn(const char *msg, const char *file,
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unsigned int line, const char *function)
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{
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#if USE_CURSES
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g_term_console.stopAndWaitforThread();
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#endif
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errorstream << std::endl << "In thread " << std::hex
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<< std::this_thread::get_id() << ":" << std::endl;
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errorstream << file << ":" << line << ": " << function
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<< ": A fatal error occurred: " << msg << std::endl;
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abort();
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}
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#ifdef _MSC_VER
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const char *Win32ExceptionCodeToString(DWORD exception_code)
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{
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switch (exception_code) {
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case EXCEPTION_ACCESS_VIOLATION:
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return "Access violation";
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case EXCEPTION_DATATYPE_MISALIGNMENT:
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return "Misaligned data access";
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case EXCEPTION_BREAKPOINT:
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return "Breakpoint reached";
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case EXCEPTION_SINGLE_STEP:
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return "Single debug step";
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case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
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return "Array access out of bounds";
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case EXCEPTION_FLT_DENORMAL_OPERAND:
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return "Denormal floating point operand";
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case EXCEPTION_FLT_DIVIDE_BY_ZERO:
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return "Floating point division by zero";
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case EXCEPTION_FLT_INEXACT_RESULT:
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return "Inaccurate floating point result";
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case EXCEPTION_FLT_INVALID_OPERATION:
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return "Invalid floating point operation";
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case EXCEPTION_FLT_OVERFLOW:
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return "Floating point exponent overflow";
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case EXCEPTION_FLT_STACK_CHECK:
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return "Floating point stack overflow or underflow";
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case EXCEPTION_FLT_UNDERFLOW:
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return "Floating point exponent underflow";
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case EXCEPTION_INT_DIVIDE_BY_ZERO:
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return "Integer division by zero";
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case EXCEPTION_INT_OVERFLOW:
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return "Integer overflow";
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case EXCEPTION_PRIV_INSTRUCTION:
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return "Privileged instruction executed";
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case EXCEPTION_IN_PAGE_ERROR:
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return "Could not access or load page";
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case EXCEPTION_ILLEGAL_INSTRUCTION:
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return "Illegal instruction encountered";
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case EXCEPTION_NONCONTINUABLE_EXCEPTION:
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return "Attempted to continue after fatal exception";
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case EXCEPTION_STACK_OVERFLOW:
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return "Stack overflow";
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case EXCEPTION_INVALID_DISPOSITION:
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return "Invalid disposition returned to the exception dispatcher";
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case EXCEPTION_GUARD_PAGE:
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return "Attempted guard page access";
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case EXCEPTION_INVALID_HANDLE:
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return "Invalid handle";
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}
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return "Unknown exception";
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}
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long WINAPI Win32ExceptionHandler(struct _EXCEPTION_POINTERS *pExceptInfo)
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{
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char buf[512];
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MINIDUMP_EXCEPTION_INFORMATION mdei;
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MINIDUMP_USER_STREAM_INFORMATION mdusi;
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MINIDUMP_USER_STREAM mdus;
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bool minidump_created = false;
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std::string dumpfile = porting::path_user + DIR_DELIM PROJECT_NAME ".dmp";
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std::string version_str(PROJECT_NAME " ");
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version_str += g_version_hash;
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HANDLE hFile = CreateFileA(dumpfile.c_str(), GENERIC_WRITE,
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FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
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if (hFile == INVALID_HANDLE_VALUE)
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goto minidump_failed;
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if (SetEndOfFile(hFile) == FALSE)
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goto minidump_failed;
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mdei.ClientPointers = NULL;
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mdei.ExceptionPointers = pExceptInfo;
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mdei.ThreadId = GetCurrentThreadId();
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mdus.Type = CommentStreamA;
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mdus.BufferSize = version_str.size();
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mdus.Buffer = (PVOID)version_str.c_str();
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mdusi.UserStreamArray = &mdus;
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mdusi.UserStreamCount = 1;
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if (MiniDumpWriteDump(GetCurrentProcess(), GetCurrentProcessId(), hFile,
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MiniDumpNormal, &mdei, &mdusi, NULL) == FALSE)
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goto minidump_failed;
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minidump_created = true;
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minidump_failed:
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CloseHandle(hFile);
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DWORD excode = pExceptInfo->ExceptionRecord->ExceptionCode;
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_snprintf(buf, sizeof(buf),
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" >> === FATAL ERROR ===\n"
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" >> %s (Exception 0x%08X) at 0x%p\n",
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Win32ExceptionCodeToString(excode), excode,
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pExceptInfo->ExceptionRecord->ExceptionAddress);
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dstream << buf;
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if (minidump_created)
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dstream << " >> Saved dump to " << dumpfile << std::endl;
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else
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dstream << " >> Failed to save dump" << std::endl;
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return EXCEPTION_EXECUTE_HANDLER;
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}
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#endif
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void debug_set_exception_handler()
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{
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#ifdef _MSC_VER
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SetUnhandledExceptionFilter(Win32ExceptionHandler);
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#endif
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}
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