diff options
Diffstat (limited to 'src/main.cpp')
| -rw-r--r-- | src/main.cpp | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/src/main.cpp b/src/main.cpp new file mode 100644 index 000000000..1f6aad24f --- /dev/null +++ b/src/main.cpp @@ -0,0 +1,197 @@ + +#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 + + + + + +/// 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 ShowCrashReport(int) +{ + std::signal(SIGSEGV, SIG_DFL); + + printf("\n\nMCServer has crashed!\n"); + + exit(-1); +} + + + + + +#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 + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// main: + +int main( int argc, char **argv ) +{ + (void)argc; + (void)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 + + #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, ShowCrashReport); + #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 + + return 0; +} + + + + |