#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
#include "Root.h"
#include <exception> //std::exception
#include <csignal> //std::signal
#include <stdlib.h> //exit()
#ifdef _MSC_VER
#include <dbghelp.h>
#endif // _MSC_VER
// Here, we have some ALL CAPS variables, to give the impression that this is deeeep, gritty programming :P
bool g_TERMINATE_EVENT_RAISED = false; // If something has told the server to stop; checked periodically in cRoot
bool g_SERVER_TERMINATED = false; // Set to true when the server terminates, so our CTRL handler can then tell Windows to close the console
/// If defined, a thorough leak finder will be used (debug MSVC only); leaks will be output to the Output window
#define ENABLE_LEAK_FINDER
#if defined(_MSC_VER) && defined(_DEBUG) && defined(ENABLE_LEAK_FINDER)
#pragma warning(push)
#pragma warning(disable:4100)
#include "LeakFinder.h"
#pragma warning(pop)
#endif
void NonCtrlHandler(int a_Signal)
{
LOGD("Terminate event raised from std::signal");
g_TERMINATE_EVENT_RAISED = true;
switch (a_Signal)
{
case SIGSEGV:
{
std::signal(SIGSEGV, SIG_DFL);
LOGWARN("Segmentation fault; MCServer has crashed :(");
exit(EXIT_FAILURE);
}
default: break;
}
}
#if defined(_WIN32) && !defined(_WIN64) && defined(_MSC_VER)
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Windows 32-bit stuff: when the server crashes, create a "dump file" containing the callstack of each thread and some variables; let the user send us that crash file for analysis
typedef BOOL (WINAPI *pMiniDumpWriteDump)(
HANDLE hProcess,
DWORD ProcessId,
HANDLE hFile,
MINIDUMP_TYPE DumpType,
PMINIDUMP_EXCEPTION_INFORMATION ExceptionParam,
PMINIDUMP_USER_STREAM_INFORMATION UserStreamParam,
PMINIDUMP_CALLBACK_INFORMATION CallbackParam
);
pMiniDumpWriteDump g_WriteMiniDump; // The function in dbghlp DLL that creates dump files
char g_DumpFileName[MAX_PATH]; // Filename of the dump file; hes to be created before the dump handler kicks in
char g_ExceptionStack[128 * 1024]; // Substitute stack, just in case the handler kicks in because of "insufficient stack space"
MINIDUMP_TYPE g_DumpFlags = MiniDumpNormal; // By default dump only the stack and some helpers
/** This function gets called just before the "program executed an illegal instruction and will be terminated" or similar.
Its purpose is to create the crashdump using the dbghlp DLLs
*/
LONG WINAPI LastChanceExceptionFilter(__in struct _EXCEPTION_POINTERS * a_ExceptionInfo)
{
char * newStack = &g_ExceptionStack[sizeof(g_ExceptionStack)];
char * oldStack;
// Use the substitute stack:
// This code is the reason why we don't support 64-bit (yet)
_asm
{
mov oldStack, esp
mov esp, newStack
}
MINIDUMP_EXCEPTION_INFORMATION ExcInformation;
ExcInformation.ThreadId = GetCurrentThreadId();
ExcInformation.ExceptionPointers = a_ExceptionInfo;
ExcInformation.ClientPointers = 0;
// Write the dump file:
HANDLE dumpFile = CreateFile(g_DumpFileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
g_WriteMiniDump(GetCurrentProcess(), GetCurrentProcessId(), dumpFile, g_DumpFlags, (a_ExceptionInfo) ? &ExcInformation : NULL, NULL, NULL);
CloseHandle(dumpFile);
// Revert to old stack:
_asm
{
mov esp, oldStack
}
return 0;
}
#endif // _WIN32 && !_WIN64
#ifdef _WIN32
// Handle CTRL events in windows, including console window close
BOOL CtrlHandler(DWORD fdwCtrlType)
{
g_TERMINATE_EVENT_RAISED = true;
LOGD("Terminate event raised from the Windows CtrlHandler");
if (fdwCtrlType == CTRL_CLOSE_EVENT) // Console windows closed via 'x' button, Windows will try to close immediately, therefore...
{
while (!g_SERVER_TERMINATED) { cSleep::MilliSleep(100); } // Delay as much as possible to try to get the server to shut down cleanly
}
return TRUE;
}
#endif
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// main:
int main( int argc, char **argv )
{
UNUSED(argc);
UNUSED(argv);
#if defined(_MSC_VER) && defined(_DEBUG) && defined(ENABLE_LEAK_FINDER)
InitLeakFinder();
#endif
// Magic code to produce dump-files on Windows if the server crashes:
#if defined(_WIN32) && !defined(_WIN64) && defined(_MSC_VER)
HINSTANCE hDbgHelp = LoadLibrary("DBGHELP.DLL");
g_WriteMiniDump = (pMiniDumpWriteDump)GetProcAddress(hDbgHelp, "MiniDumpWriteDump");
if (g_WriteMiniDump != NULL)
{
_snprintf_s(g_DumpFileName, ARRAYCOUNT(g_DumpFileName), _TRUNCATE, "crash_mcs_%x.dmp", GetCurrentProcessId());
SetUnhandledExceptionFilter(LastChanceExceptionFilter);
// Parse arguments for minidump flags:
for (int i = 0; i < argc; i++)
{
if (_stricmp(argv[i], "/cdg") == 0)
{
// Add globals to the dump
g_DumpFlags = (MINIDUMP_TYPE)(g_DumpFlags | MiniDumpWithDataSegs);
}
else if (_stricmp(argv[i], "/cdf") == 0)
{
// Add full memory to the dump (HUUUGE file)
g_DumpFlags = (MINIDUMP_TYPE)(g_DumpFlags | MiniDumpWithFullMemory);
}
} // for i - argv[]
}
#endif // _WIN32 && !_WIN64
// End of dump-file magic
#ifdef _WIN32
if (!SetConsoleCtrlHandler((PHANDLER_ROUTINE)CtrlHandler, TRUE))
{
LOGERROR("Could not install the Windows CTRL handler!");
}
#endif
#if defined(_DEBUG) && defined(_MSC_VER)
_CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
// _X: The simple built-in CRT leak finder - simply break when allocating the Nth block ({N} is listed in the leak output)
// Only useful when the leak is in the same sequence all the time
// _CrtSetBreakAlloc(85950);
#endif // _DEBUG && _MSC_VER
#ifndef _DEBUG
std::signal(SIGSEGV, NonCtrlHandler);
std::signal(SIGTERM, NonCtrlHandler);
std::signal(SIGINT, NonCtrlHandler);
#endif
// DEBUG: test the dumpfile creation:
// *((int *)0) = 0;
#if !defined(ANDROID_NDK)
try
#endif
{
cRoot Root;
Root.Start();
}
#if !defined(ANDROID_NDK)
catch( std::exception& e )
{
LOGERROR("Standard exception: %s", e.what() );
}
catch( ... )
{
LOGERROR("Unknown exception!");
}
#endif
#if defined(_MSC_VER) && defined(_DEBUG) && defined(ENABLE_LEAK_FINDER)
DeinitLeakFinder();
#endif
g_SERVER_TERMINATED = true;
return EXIT_SUCCESS;
}
