diff options
| -rw-r--r-- | source/main.cpp | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/source/main.cpp b/source/main.cpp index 416c49033..14c031e9e 100644 --- a/source/main.cpp +++ b/source/main.cpp @@ -7,6 +7,10 @@ #include <csignal> //std::signal
#include <stdlib.h> //exit()
+#ifdef _WIN32
+ #include <dbghelp.h>
+#endif // _WIN32
+
#include "SquirrelBindings.h"
#if USE_SQUIRREL
#pragma warning(push)
@@ -51,6 +55,72 @@ void ShowCrashReport(int) +#ifdef _WIN32
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Windows 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 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:
+ _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, DumpFlags, (a_ExceptionInfo) ? &ExcInformation : NULL, NULL, NULL);
+ CloseHandle(dumpFile);
+
+ // Revert to old stack:
+ _asm
+ {
+ mov esp, oldStack
+ }
+
+ return 0;
+}
+
+#endif // _WIN32
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// main:
+
int main( int argc, char **argv )
{
(void)argc;
@@ -60,6 +130,18 @@ int main( int argc, char **argv ) InitLeakFinder();
#endif
+ // Magic code to produce dump-files on Windows if the server crashes:
+ #ifdef _WIN32
+ 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);
+ }
+ #endif // _WIN32
+ // End of dump-file magic
+
#ifdef _DEBUG
_CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
@@ -73,6 +155,9 @@ int main( int argc, char **argv ) std::signal(SIGSEGV, ShowCrashReport);
#endif
+ // DEBUG: test the dumpfile creation:
+ // *((int *)0) = 0;
+
try
{
cRoot Root;
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