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/**
* @file llwindebug.cpp
* @brief Windows debugging functions
*
* Copyright (c) 2004-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#include "llviewerprecompiledheaders.h"
#ifdef LL_WINDOWS
#include "llwindebug.h"
#include "llviewercontrol.h"
#include "lldir.h"
// From viewer.h
extern BOOL gInProductionGrid;
extern void (*gCrashCallback)(void);
extern void write_debug(const char *str);
extern void write_debug(const std::string &str);
// based on dbghelp.h
typedef BOOL (WINAPI *MINIDUMPWRITEDUMP)(HANDLE hProcess, DWORD dwPid, HANDLE hFile, MINIDUMP_TYPE DumpType,
CONST PMINIDUMP_EXCEPTION_INFORMATION ExceptionParam,
CONST PMINIDUMP_USER_STREAM_INFORMATION UserStreamParam,
CONST PMINIDUMP_CALLBACK_INFORMATION CallbackParam
);
MINIDUMPWRITEDUMP f_mdwp = NULL;
class LLMemoryReserve {
public:
LLMemoryReserve();
~LLMemoryReserve();
void reserve();
void release();
protected:
unsigned char *mReserve;
static const size_t MEMORY_RESERVATION_SIZE;
};
LLMemoryReserve::LLMemoryReserve() :
mReserve(NULL)
{
};
LLMemoryReserve::~LLMemoryReserve()
{
release();
}
// I dunno - this just seemed like a pretty good value.
const size_t LLMemoryReserve::MEMORY_RESERVATION_SIZE = 5 * 1024 * 1024;
void LLMemoryReserve::reserve()
{
if(NULL == mReserve)
mReserve = new unsigned char[MEMORY_RESERVATION_SIZE];
};
void LLMemoryReserve::release()
{
delete [] mReserve;
mReserve = NULL;
};
static LLMemoryReserve gEmergencyMemoryReserve;
// static
BOOL LLWinDebug::setupExceptionHandler()
{
#ifdef LL_RELEASE_FOR_DOWNLOAD
static BOOL s_first_run = TRUE;
// Load the dbghelp dll now, instead of waiting for the crash.
// Less potential for stack mangling
BOOL ok = TRUE;
if (s_first_run)
{
// First, try loading from the directory that the app resides in.
std::string local_dll_name = gDirUtilp->findFile("dbghelp.dll", gDirUtilp->getWorkingDir(), gDirUtilp->getExecutableDir());
HMODULE hDll = NULL;
hDll = LoadLibraryA(local_dll_name.c_str());
if (!hDll)
{
hDll = LoadLibrary(L"dbghelp.dll");
}
if (!hDll)
{
llwarns << "Couldn't find dbghelp.dll!" << llendl;
std::string msg = "Couldn't find dbghelp.dll at ";
msg += local_dll_name;
msg += "!\n";
write_debug(msg.c_str());
ok = FALSE;
}
else
{
f_mdwp = (MINIDUMPWRITEDUMP) GetProcAddress(hDll, "MiniDumpWriteDump");
if (!f_mdwp)
{
write_debug("No MiniDumpWriteDump!\n");
ok = FALSE;
}
}
gEmergencyMemoryReserve.reserve();
}
LPTOP_LEVEL_EXCEPTION_FILTER prev_filter;
prev_filter = SetUnhandledExceptionFilter(LLWinDebug::handleException);
if (s_first_run)
{
// We're fine, this is the first run.
s_first_run = FALSE;
return ok;
}
if (!prev_filter)
{
llwarns << "Our exception handler (" << (void *)LLWinDebug::handleException << ") replaced with NULL!" << llendl;
ok = FALSE;
}
if (prev_filter != LLWinDebug::handleException)
{
llwarns << "Our exception handler (" << (void *)LLWinDebug::handleException << ") replaced with " << prev_filter << "!" << llendl;
ok = FALSE;
}
return ok;
#else
// Internal builds don't mess with exception handling.
return TRUE;
#endif
}
void LLWinDebug::writeDumpToFile(MINIDUMP_TYPE type, MINIDUMP_EXCEPTION_INFORMATION *ExInfop, const char *filename)
{
if(f_mdwp == NULL)
{
write_debug("No way to generate a minidump, no MiniDumpWriteDump function!\n");
}
else if(gDirUtilp == NULL)
{
write_debug("No way to generate a minidump, no gDirUtilp!\n");
}
else
{
std::string dump_path = gDirUtilp->getExpandedFilename(LL_PATH_LOGS,
filename);
HANDLE hFile = CreateFileA(dump_path.c_str(),
GENERIC_WRITE,
FILE_SHARE_WRITE,
NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (hFile != INVALID_HANDLE_VALUE)
{
// Write the dump, ignoring the return value
f_mdwp(GetCurrentProcess(),
GetCurrentProcessId(),
hFile,
type,
ExInfop,
NULL,
NULL);
CloseHandle(hFile);
}
}
}
// static
LONG LLWinDebug::handleException(struct _EXCEPTION_POINTERS *exception_infop)
{
//
// Let go of a bunch of reserved memory to give library calls etc
// a chance to execute normally in the case that we ran out of
// memory.
//
gEmergencyMemoryReserve.release();
BOOL userWantsMaxiDump =
(stricmp(gSavedSettings.getString("LastName").c_str(), "linden") == 0)
|| (stricmp(gSavedSettings.getString("LastName").c_str(), "tester") == 0);
BOOL alsoSaveMaxiDump = userWantsMaxiDump && !gInProductionGrid;
/* Calculate alsoSaveMaxiDump here */
if (exception_infop)
{
_MINIDUMP_EXCEPTION_INFORMATION ExInfo;
ExInfo.ThreadId = ::GetCurrentThreadId();
ExInfo.ExceptionPointers = exception_infop;
ExInfo.ClientPointers = NULL;
writeDumpToFile(MiniDumpNormal, &ExInfo, "SecondLife.dmp");
if(alsoSaveMaxiDump)
writeDumpToFile((MINIDUMP_TYPE)(MiniDumpWithDataSegs | MiniDumpWithIndirectlyReferencedMemory), &ExInfo, "SecondLifePlus.dmp");
}
else
{
writeDumpToFile(MiniDumpNormal, NULL, "SecondLife.dmp");
if(alsoSaveMaxiDump)
writeDumpToFile((MINIDUMP_TYPE)(MiniDumpWithDataSegs | MiniDumpWithIndirectlyReferencedMemory), NULL, "SecondLifePlus.dmp");
}
if (!exception_infop)
{
// We're calling this due to a network error, not due to an actual exception.
// It doesn't realy matter what we return.
return EXCEPTION_CONTINUE_SEARCH;
}
//
// Call the newview crash callback, which will spawn the crash
// reporter. It may or may not spawn a dialog.
//
if (gCrashCallback)
{
gCrashCallback();
}
//
// At this point, we always want to exit the app. There's no graceful
// recovery for an unhandled exception.
//
// Just kill the process.
LONG retval = EXCEPTION_EXECUTE_HANDLER;
return retval;
}
#endif
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