1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
#include "cRoot.h"
#include <exception> //std::exception
#include <csignal> //std::signal
#include <stdlib.h> //exit()
#ifdef _WIN32
#include <dbghelp.h>
#endif // _WIN32
#include "SquirrelBindings.h"
#if USE_SQUIRREL
#pragma warning(push)
#pragma warning(disable:4100;disable:4127;disable:4510;disable:4610;disable:4244;disable:4512) // Getting A LOT of these warnings from SqPlus
#include <sqplus/sqplus.h>
#pragma warning(pop)
#endif
/// 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)
#define XML_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);
}
#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;
(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:
#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 );
// _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
#ifndef _DEBUG
std::signal(SIGSEGV, ShowCrashReport);
#endif
// DEBUG: test the dumpfile creation:
// *((int *)0) = 0;
try
{
cRoot Root;
Root.Start();
}
catch( std::exception& e )
{
LOGERROR("Standard exception: %s", e.what() );
}
catch( ... )
{
LOGERROR("Unknown exception!");
}
#if USE_SQUIRREL
SquirrelVM::Shutdown();
#endif
#if defined(_MSC_VER) && defined(_DEBUG) && defined(ENABLE_LEAK_FINDER)
DeinitLeakFinder();
#endif
return 0;
}
|
