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-rw-r--r--src/OSSupport/MiniDumpWriter.h137
1 files changed, 71 insertions, 66 deletions
diff --git a/src/OSSupport/MiniDumpWriter.h b/src/OSSupport/MiniDumpWriter.h
index e5cd1a0ac..c223fa9fb 100644
--- a/src/OSSupport/MiniDumpWriter.h
+++ b/src/OSSupport/MiniDumpWriter.h
@@ -1,5 +1,11 @@
-#pragma once
+// MiniDumpWriter.h
+
+// 32-bit only:
+// 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.
+
+// This file MUST NOT be included from anywhere other than main.cpp.
@@ -18,30 +24,64 @@ enum class MiniDumpFlags
#if defined(_WIN32) && !defined(_WIN64) && defined(_MSC_VER) // 32-bit Windows app compiled in MSVC
-#include <dbghelp.h>
+#include <DbgHelp.h>
+
+
+
+
+
+using MiniDumpWriteDumpFunction = decltype(&MiniDumpWriteDump);
+
+static HINSTANCE m_DbgHelp;
+static MiniDumpWriteDumpFunction s_WriteMiniDump; // The function in dbghlp DLL that creates dump files
+static wchar_t s_DumpFileName[MAX_PATH]; // Filename of the dump file; hes to be created before the dump handler kicks in
+static char s_ExceptionStack[128 * 1024]; // Substitute stack, just in case the handler kicks in because of "insufficient stack space"
+static MINIDUMP_TYPE s_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 */
+static LONG WINAPI LastChanceExceptionFilter(__in struct _EXCEPTION_POINTERS * a_ExceptionInfo)
+{
+ char * newStack = &s_ExceptionStack[sizeof(s_ExceptionStack) - 1];
+ 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(s_DumpFileName, GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
+ s_WriteMiniDump(GetCurrentProcess(), GetCurrentProcessId(), dumpFile, s_DumpFlags, (a_ExceptionInfo) ? &ExcInformation : nullptr, nullptr, nullptr);
+ CloseHandle(dumpFile);
+
+ // Revert to old stack:
+ _asm
+ {
+ mov esp, oldStack
+ }
+
+ return 0;
+}
-/** 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 */
-class MiniDumpWriter
+namespace MiniDumpWriter
{
- 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
- );
-
-public:
-
- MiniDumpWriter()
+ static void Register()
{
// Magic code to produce dump-files on Windows if the server crashes:
@@ -51,7 +91,7 @@ public:
return;
}
- s_WriteMiniDump = (pMiniDumpWriteDump)GetProcAddress(m_DbgHelp, "MiniDumpWriteDump");
+ s_WriteMiniDump = (MiniDumpWriteDumpFunction)GetProcAddress(m_DbgHelp, "MiniDumpWriteDump");
if (s_WriteMiniDump != nullptr)
{
ASSERT(swprintf(s_DumpFileName, ARRAYCOUNT(s_DumpFileName), L"crash_mcs_%x.dmp", GetCurrentProcessId()) > 0);
@@ -61,7 +101,7 @@ public:
// End of dump-file magic
}
- void AddDumpFlags(const MiniDumpFlags a_Flags)
+ static void AddDumpFlags(const MiniDumpFlags a_Flags)
{
switch (a_Flags)
{
@@ -78,60 +118,25 @@ public:
}
}
- ~MiniDumpWriter()
+ static void Unregister()
{
FreeLibrary(m_DbgHelp);
}
+};
-private:
+#else
- /** 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 */
- static LONG WINAPI LastChanceExceptionFilter(__in struct _EXCEPTION_POINTERS * a_ExceptionInfo)
+namespace MiniDumpWriter
+{
+ static void Register()
{
- char * newStack = &s_ExceptionStack[sizeof(s_ExceptionStack) - 1];
- 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(s_DumpFileName, GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
- s_WriteMiniDump(GetCurrentProcess(), GetCurrentProcessId(), dumpFile, s_DumpFlags, (a_ExceptionInfo) ? &ExcInformation : nullptr, nullptr, nullptr);
- CloseHandle(dumpFile);
-
- // Revert to old stack:
- _asm
- {
- mov esp, oldStack
- }
-
- return 0;
}
- HINSTANCE m_DbgHelp;
-
- static inline pMiniDumpWriteDump s_WriteMiniDump; // The function in dbghlp DLL that creates dump files
- static inline wchar_t s_DumpFileName[MAX_PATH]; // Filename of the dump file; hes to be created before the dump handler kicks in
- static inline char s_ExceptionStack[128 * 1024]; // Substitute stack, just in case the handler kicks in because of "insufficient stack space"
- static inline MINIDUMP_TYPE s_DumpFlags = MiniDumpNormal; // By default dump only the stack and some helpers
-};
-
-#else
+ static void AddDumpFlags(const MiniDumpFlags)
+ {
+ }
-struct MiniDumpWriter
-{
- void AddDumpFlags(const MiniDumpFlags)
+ static void Unregister()
{
}
};