688 lines
24 KiB
C++
688 lines
24 KiB
C++
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================//
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#include "pch_tier0.h"
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#include "tier0/minidump.h"
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#include "tier0/platform.h"
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#if defined( _WIN32 ) && !defined( _X360 )
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#if _MSC_VER >= 1300
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#include "tier0/valve_off.h"
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#define WIN_32_LEAN_AND_MEAN
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#include <windows.h>
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#include <dbghelp.h>
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#include <time.h>
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// MiniDumpWriteDump() function declaration (so we can just get the function directly from windows)
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typedef BOOL (WINAPI *MINIDUMPWRITEDUMP)
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(
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HANDLE hProcess,
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DWORD dwPid,
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HANDLE hFile,
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MINIDUMP_TYPE DumpType,
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CONST PMINIDUMP_EXCEPTION_INFORMATION ExceptionParam,
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CONST PMINIDUMP_USER_STREAM_INFORMATION UserStreamParam,
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CONST PMINIDUMP_CALLBACK_INFORMATION CallbackParam
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);
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// counter used to make sure minidump names are unique
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static int g_nMinidumpsWritten = 0;
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// process-wide prefix to use for minidumps
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static tchar g_rgchMinidumpFilenamePrefix[MAX_PATH];
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// Process-wide comment to put into minidumps
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static char g_rgchMinidumpComment[2048];
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//-----------------------------------------------------------------------------
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// Purpose: Creates a new file and dumps the exception info into it
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// Input : uStructuredExceptionCode - windows exception code, unused.
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// pExceptionInfo - call stack.
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// minidumpType - type of minidump to write.
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// ptchMinidumpFileNameBuffer - if not-NULL points to a writable tchar buffer
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// of length at least _MAX_PATH to contain the name
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// of the written minidump file on return.
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//-----------------------------------------------------------------------------
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bool WriteMiniDumpUsingExceptionInfo(
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unsigned int uStructuredExceptionCode,
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_EXCEPTION_POINTERS * pExceptionInfo,
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int minidumpType,
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const char *pszFilenameSuffix,
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tchar *ptchMinidumpFileNameBuffer /* = NULL */
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)
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{
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if ( ptchMinidumpFileNameBuffer )
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{
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*ptchMinidumpFileNameBuffer = tchar( 0 );
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}
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// get the function pointer directly so that we don't have to include the .lib, and that
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// we can easily change it to using our own dll when this code is used on win98/ME/2K machines
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HMODULE hDbgHelpDll = ::LoadLibrary( "DbgHelp.dll" );
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if ( !hDbgHelpDll )
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return false;
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bool bReturnValue = false;
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MINIDUMPWRITEDUMP pfnMiniDumpWrite = (MINIDUMPWRITEDUMP) ::GetProcAddress( hDbgHelpDll, "MiniDumpWriteDump" );
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if ( pfnMiniDumpWrite )
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{
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// create a unique filename for the minidump based on the current time and module name
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time_t currTime = ::time( NULL );
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struct tm * pTime = ::localtime( &currTime );
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++g_nMinidumpsWritten;
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// If they didn't set a dump prefix, then set one for them using the module name
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if ( g_rgchMinidumpFilenamePrefix[0] == TCHAR(0) )
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{
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tchar rgchModuleName[MAX_PATH];
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#ifdef TCHAR_IS_WCHAR
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::GetModuleFileNameW( NULL, rgchModuleName, sizeof(rgchModuleName) / sizeof(tchar) );
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#else
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::GetModuleFileName( NULL, rgchModuleName, sizeof(rgchModuleName) / sizeof(tchar) );
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#endif
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// strip off the rest of the path from the .exe name
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tchar *pch = _tcsrchr( rgchModuleName, '.' );
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if ( pch )
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{
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*pch = 0;
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}
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pch = _tcsrchr( rgchModuleName, '\\' );
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if ( pch )
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{
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// move past the last slash
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pch++;
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}
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else
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{
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pch = _T("unknown");
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}
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strcpy( g_rgchMinidumpFilenamePrefix, pch );
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}
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// can't use the normal string functions since we're in tier0
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tchar rgchFileName[MAX_PATH];
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_sntprintf( rgchFileName, sizeof(rgchFileName) / sizeof(tchar),
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_T("%s_%d%02d%02d_%02d%02d%02d_%d%hs%hs.mdmp"),
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g_rgchMinidumpFilenamePrefix,
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pTime->tm_year + 1900, /* Year less 2000 */
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pTime->tm_mon + 1, /* month (0 - 11 : 0 = January) */
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pTime->tm_mday, /* day of month (1 - 31) */
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pTime->tm_hour, /* hour (0 - 23) */
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pTime->tm_min, /* minutes (0 - 59) */
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pTime->tm_sec, /* seconds (0 - 59) */
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g_nMinidumpsWritten, // ensures the filename is unique
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( pszFilenameSuffix != NULL ) ? "_" : "",
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( pszFilenameSuffix != NULL ) ? pszFilenameSuffix : ""
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);
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// Ensure null-termination.
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rgchFileName[ Q_ARRAYSIZE(rgchFileName) - 1 ] = 0;
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// Create directory, if our dump filename had a directory in it
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for ( char *pSlash = rgchFileName ; *pSlash != '\0' ; ++pSlash )
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{
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char c = *pSlash;
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if ( c == '/' || c == '\\' )
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{
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*pSlash = '\0';
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::CreateDirectory( rgchFileName, NULL );
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*pSlash = c;
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}
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}
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BOOL bMinidumpResult = FALSE;
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#ifdef TCHAR_IS_WCHAR
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HANDLE hFile = ::CreateFileW( rgchFileName, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
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#else
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HANDLE hFile = ::CreateFile( rgchFileName, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
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#endif
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if ( hFile )
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{
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// dump the exception information into the file
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_MINIDUMP_EXCEPTION_INFORMATION ExInfo;
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ExInfo.ThreadId = ::GetCurrentThreadId();
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ExInfo.ExceptionPointers = pExceptionInfo;
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ExInfo.ClientPointers = FALSE;
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// Do we have a comment?
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MINIDUMP_USER_STREAM_INFORMATION StreamInformationHeader;
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MINIDUMP_USER_STREAM UserStreams[1];
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memset( &StreamInformationHeader, 0, sizeof(StreamInformationHeader) );
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StreamInformationHeader.UserStreamArray = UserStreams;
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if ( g_rgchMinidumpComment[0] != '\0' )
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{
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MINIDUMP_USER_STREAM *pCommentStream = &UserStreams[StreamInformationHeader.UserStreamCount++];
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pCommentStream->Type = CommentStreamA;
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pCommentStream->Buffer = g_rgchMinidumpComment;
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pCommentStream->BufferSize = (ULONG)strlen(g_rgchMinidumpComment)+1;
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}
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bMinidumpResult = (*pfnMiniDumpWrite)( ::GetCurrentProcess(), ::GetCurrentProcessId(), hFile, (MINIDUMP_TYPE)minidumpType, &ExInfo, &StreamInformationHeader, NULL );
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::CloseHandle( hFile );
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// Clear comment for next time
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g_rgchMinidumpComment[0] = '\0';
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if ( bMinidumpResult )
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{
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bReturnValue = true;
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if ( ptchMinidumpFileNameBuffer )
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{
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// Copy the file name from "pSrc = rgchFileName" into "pTgt = ptchMinidumpFileNameBuffer"
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tchar *pTgt = ptchMinidumpFileNameBuffer;
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tchar const *pSrc = rgchFileName;
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while ( ( *( pTgt ++ ) = *( pSrc ++ ) ) != tchar( 0 ) )
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continue;
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}
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}
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// fall through to trying again
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}
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// mark any failed minidump writes by renaming them
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if ( !bMinidumpResult )
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{
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tchar rgchFailedFileName[_MAX_PATH];
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_sntprintf( rgchFailedFileName, sizeof(rgchFailedFileName) / sizeof(tchar), "(failed)%s", rgchFileName );
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// Ensure null-termination.
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rgchFailedFileName[ Q_ARRAYSIZE(rgchFailedFileName) - 1 ] = 0;
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rename( rgchFileName, rgchFailedFileName );
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}
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}
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::FreeLibrary( hDbgHelpDll );
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// call the log flush function if one is registered to try to flush any logs
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//CallFlushLogFunc();
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return bReturnValue;
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}
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void InternalWriteMiniDumpUsingExceptionInfo( unsigned int uStructuredExceptionCode, _EXCEPTION_POINTERS * pExceptionInfo, const char *pszFilenameSuffix )
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{
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// If this is is a real crash (not an assert or one we purposefully triggered), then try to write a full dump
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// only do this on our GC (currently GC is 64-bit, so we can use a #define rather than some run-time switch
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#ifdef _WIN64
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if ( uStructuredExceptionCode != EXCEPTION_BREAKPOINT )
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{
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if ( WriteMiniDumpUsingExceptionInfo( uStructuredExceptionCode, pExceptionInfo, MiniDumpWithFullMemory, pszFilenameSuffix ) )
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{
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return;
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}
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}
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#endif
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// First try to write it with all the indirectly referenced memory (ie: a large file).
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// If that doesn't work, then write a smaller one.
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int iType = MiniDumpWithDataSegs | MiniDumpWithIndirectlyReferencedMemory;
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if ( !WriteMiniDumpUsingExceptionInfo( uStructuredExceptionCode, pExceptionInfo, (MINIDUMP_TYPE)iType, pszFilenameSuffix ) )
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{
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iType = MiniDumpWithDataSegs;
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WriteMiniDumpUsingExceptionInfo( uStructuredExceptionCode, pExceptionInfo, (MINIDUMP_TYPE)iType, pszFilenameSuffix );
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}
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}
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// minidump function to use
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static FnMiniDump g_pfnWriteMiniDump = InternalWriteMiniDumpUsingExceptionInfo;
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//-----------------------------------------------------------------------------
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// Purpose: Set a function to call which will write our minidump, overriding
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// the default function
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// Input : pfn - Pointer to minidump function to set
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// Output : Previously set function
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//-----------------------------------------------------------------------------
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FnMiniDump SetMiniDumpFunction( FnMiniDump pfn )
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{
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FnMiniDump pfnTemp = g_pfnWriteMiniDump;
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g_pfnWriteMiniDump = pfn;
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return pfnTemp;
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}
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//-----------------------------------------------------------------------------
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// Unhandled exceptions
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//-----------------------------------------------------------------------------
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static FnMiniDump g_UnhandledExceptionFunction;
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static LONG STDCALL ValveUnhandledExceptionFilter( _EXCEPTION_POINTERS* pExceptionInfo )
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{
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uint uStructuredExceptionCode = pExceptionInfo->ExceptionRecord->ExceptionCode;
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g_UnhandledExceptionFunction( uStructuredExceptionCode, pExceptionInfo, 0 );
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return EXCEPTION_CONTINUE_SEARCH;
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}
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void MinidumpSetUnhandledExceptionFunction( FnMiniDump pfn )
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{
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g_UnhandledExceptionFunction = pfn;
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SetUnhandledExceptionFilter( ValveUnhandledExceptionFilter );
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}
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//-----------------------------------------------------------------------------
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// Purpose: set prefix to use for filenames
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//-----------------------------------------------------------------------------
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void SetMinidumpFilenamePrefix( const char *pszPrefix )
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{
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#ifdef TCHAR_IS_WCHAR
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mbstowcs( g_rgchMinidumpFilenamePrefix, pszPrefix, sizeof(g_rgchMinidumpFilenamePrefix) / sizeof(g_rgchMinidumpFilenamePrefix[0]) - 1 );
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#else
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strncpy( g_rgchMinidumpFilenamePrefix, pszPrefix, sizeof(g_rgchMinidumpFilenamePrefix) / sizeof(g_rgchMinidumpFilenamePrefix[0]) - 1 );
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#endif
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}
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//-----------------------------------------------------------------------------
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// Purpose: set comment to put into minidumps
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//-----------------------------------------------------------------------------
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void SetMinidumpComment( const char *pszComment )
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{
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if ( pszComment == NULL )
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pszComment = "";
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strncpy( g_rgchMinidumpComment, pszComment, sizeof(g_rgchMinidumpComment) - 1 );
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}
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//-----------------------------------------------------------------------------
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// Purpose: writes out a minidump from the current process
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//-----------------------------------------------------------------------------
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void WriteMiniDump( const char *pszFilenameSuffix )
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{
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// throw an exception so we can catch it and get the stack info
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__try
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{
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::RaiseException
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(
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EXCEPTION_BREAKPOINT, // dwExceptionCode
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EXCEPTION_NONCONTINUABLE, // dwExceptionFlags
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0, // nNumberOfArguments,
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NULL // const ULONG_PTR* lpArguments
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);
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// Never get here (non-continuable exception)
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}
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// Write the minidump from inside the filter (GetExceptionInformation() is only
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// valid in the filter)
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__except ( g_pfnWriteMiniDump( EXCEPTION_BREAKPOINT, GetExceptionInformation(), pszFilenameSuffix ), EXCEPTION_EXECUTE_HANDLER )
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{
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}
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}
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DBG_OVERLOAD bool g_bInException = false;
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//-----------------------------------------------------------------------------
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// Purpose: Catches and writes out any exception throw by the specified function.
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// Input: pfn - Function to call within protective exception block
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// pv - Void pointer to pass that function
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//-----------------------------------------------------------------------------
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void CatchAndWriteMiniDump( FnWMain pfn, int argc, tchar *argv[] )
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{
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CatchAndWriteMiniDumpEx( pfn, argc, argv, k_ECatchAndWriteMiniDumpAbort );
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}
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// message types
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enum ECatchAndWriteFunctionType
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{
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k_eSCatchAndWriteFunctionTypeInvalid = 0,
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k_eSCatchAndWriteFunctionTypeWMain = 1, // typedef void (*FnWMain)( int , tchar *[] );
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k_eSCatchAndWriteFunctionTypeWMainIntReg = 2, // typedef int (*FnWMainIntRet)( int , tchar *[] );
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k_eSCatchAndWriteFunctionTypeVoidPtr = 3, // typedef void (*FnVoidPtrFn)( void * );
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};
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struct CatchAndWriteContext_t
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{
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ECatchAndWriteFunctionType m_eType;
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void *m_pfn;
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int *m_pargc;
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tchar ***m_pargv;
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void **m_ppv;
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ECatchAndWriteMinidumpAction m_eAction;
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void Set( ECatchAndWriteFunctionType eType, ECatchAndWriteMinidumpAction eAction, void *pfn, int *pargc, tchar **pargv[], void **ppv )
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{
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m_eType = eType;
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m_eAction = eAction;
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m_pfn = pfn;
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|
m_pargc = pargc;
|
||
|
|
m_pargv = pargv;
|
||
|
|
m_ppv = ppv;
|
||
|
|
|
||
|
|
ErrorIfNot( m_pfn, ( "CatchAndWriteContext_t::Set w/o a function pointer!" ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
int Invoke()
|
||
|
|
{
|
||
|
|
switch ( m_eType )
|
||
|
|
{
|
||
|
|
default:
|
||
|
|
case k_eSCatchAndWriteFunctionTypeInvalid:
|
||
|
|
break;
|
||
|
|
case k_eSCatchAndWriteFunctionTypeWMain:
|
||
|
|
ErrorIfNot( m_pargc && m_pargv, ( "CatchAndWriteContext_t::Invoke with bogus argc/argv" ) );
|
||
|
|
((FnWMain)m_pfn)( *m_pargc, *m_pargv );
|
||
|
|
break;
|
||
|
|
case k_eSCatchAndWriteFunctionTypeWMainIntReg:
|
||
|
|
ErrorIfNot( m_pargc && m_pargv, ( "CatchAndWriteContext_t::Invoke with bogus argc/argv" ) );
|
||
|
|
return ((FnWMainIntRet)m_pfn)( *m_pargc, *m_pargv );
|
||
|
|
case k_eSCatchAndWriteFunctionTypeVoidPtr:
|
||
|
|
ErrorIfNot( m_ppv, ( "CatchAndWriteContext_t::Invoke with bogus void *ptr" ) );
|
||
|
|
((FnVoidPtrFn)m_pfn)( *m_ppv );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
// Purpose: Catches and writes out any exception throw by the specified function
|
||
|
|
// Input: pfn - Function to call within protective exception block
|
||
|
|
// pv - Void pointer to pass that function
|
||
|
|
// eAction - Specifies what to do if it catches an exception
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
#if defined(_PS3)
|
||
|
|
|
||
|
|
int CatchAndWriteMiniDump_Impl( CatchAndWriteContext_t &ctx )
|
||
|
|
{
|
||
|
|
// we dont handle minidumps on ps3
|
||
|
|
return ctx.Invoke();
|
||
|
|
}
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
static const char *GetExceptionCodeName( unsigned long code )
|
||
|
|
{
|
||
|
|
switch ( code )
|
||
|
|
{
|
||
|
|
case EXCEPTION_ACCESS_VIOLATION: return "accessviolation";
|
||
|
|
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: return "arrayboundsexceeded";
|
||
|
|
case EXCEPTION_BREAKPOINT: return "breakpoint";
|
||
|
|
case EXCEPTION_DATATYPE_MISALIGNMENT: return "datatypemisalignment";
|
||
|
|
case EXCEPTION_FLT_DENORMAL_OPERAND: return "fltdenormaloperand";
|
||
|
|
case EXCEPTION_FLT_DIVIDE_BY_ZERO: return "fltdividebyzero";
|
||
|
|
case EXCEPTION_FLT_INEXACT_RESULT: return "fltinexactresult";
|
||
|
|
case EXCEPTION_FLT_INVALID_OPERATION: return "fltinvalidoperation";
|
||
|
|
case EXCEPTION_FLT_OVERFLOW: return "fltoverflow";
|
||
|
|
case EXCEPTION_FLT_STACK_CHECK: return "fltstackcheck";
|
||
|
|
case EXCEPTION_FLT_UNDERFLOW: return "fltunderflow";
|
||
|
|
case EXCEPTION_INT_DIVIDE_BY_ZERO: return "intdividebyzero";
|
||
|
|
case EXCEPTION_INT_OVERFLOW: return "intoverflow";
|
||
|
|
case EXCEPTION_NONCONTINUABLE_EXCEPTION: return "noncontinuableexception";
|
||
|
|
case EXCEPTION_PRIV_INSTRUCTION: return "privinstruction";
|
||
|
|
case EXCEPTION_SINGLE_STEP: return "singlestep";
|
||
|
|
}
|
||
|
|
|
||
|
|
// Unknown exception
|
||
|
|
return "crash";
|
||
|
|
}
|
||
|
|
|
||
|
|
int CatchAndWriteMiniDump_Impl( CatchAndWriteContext_t &ctx )
|
||
|
|
{
|
||
|
|
// Sorry, this is the only action currently implemented!
|
||
|
|
Assert( ctx.m_eAction == k_ECatchAndWriteMiniDumpAbort );
|
||
|
|
|
||
|
|
if ( Plat_IsInDebugSession() )
|
||
|
|
{
|
||
|
|
// don't mask exceptions when running in the debugger
|
||
|
|
return ctx.Invoke();
|
||
|
|
}
|
||
|
|
|
||
|
|
// g_DumpHelper.Init();
|
||
|
|
|
||
|
|
// Win32 code gets to use a special handler
|
||
|
|
#if defined( _WIN32 )
|
||
|
|
__try
|
||
|
|
{
|
||
|
|
return ctx.Invoke();
|
||
|
|
}
|
||
|
|
__except ( g_pfnWriteMiniDump( GetExceptionCode(), GetExceptionInformation(), GetExceptionCodeName( GetExceptionCode() ) ), EXCEPTION_EXECUTE_HANDLER )
|
||
|
|
{
|
||
|
|
TerminateProcess( GetCurrentProcess(), EXIT_FAILURE ); // die, die RIGHT NOW! (don't call exit() so destructors will not get run)
|
||
|
|
}
|
||
|
|
|
||
|
|
// if we get here, we definitely are not in an exception handler
|
||
|
|
g_bInException = false;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
#else
|
||
|
|
// if ( ctx.m_pargv != 0 )
|
||
|
|
// {
|
||
|
|
// g_DumpHelper.ComputeExeNameFromArgv0( (*ctx.m_pargv)[ 0 ] );
|
||
|
|
// }
|
||
|
|
//
|
||
|
|
// ICrashHandler *handler = g_DumpHelper.GetHandlerAPI();
|
||
|
|
// CCrashHandlerScope scope( handler, g_DumpHelper.GetProduct(), g_DumpHelper.GetVersion(), g_DumpHelper.GetBuildID(), false );
|
||
|
|
// if ( handler )
|
||
|
|
// handler->SetSteamID( g_DumpHelper.GetSteamID() );
|
||
|
|
|
||
|
|
return ctx.Invoke();
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // _PS3
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
// Purpose: Catches and writes out any exception throw by the specified function
|
||
|
|
// Input: pfn - Function to call within protective exception block
|
||
|
|
// pv - Void pointer to pass that function
|
||
|
|
// eAction - Specifies what to do if it catches an exception
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
void CatchAndWriteMiniDumpEx( FnWMain pfn, int argc, tchar *argv[], ECatchAndWriteMinidumpAction eAction )
|
||
|
|
{
|
||
|
|
CatchAndWriteContext_t ctx;
|
||
|
|
ctx.Set( k_eSCatchAndWriteFunctionTypeWMain, eAction, (void *)pfn, &argc, &argv, NULL );
|
||
|
|
CatchAndWriteMiniDump_Impl( ctx );
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
// Purpose: Catches and writes out any exception throw by the specified function
|
||
|
|
// Input: pfn - Function to call within protective exception block
|
||
|
|
// pv - Void pointer to pass that function
|
||
|
|
// eAction - Specifies what to do if it catches an exception
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
int CatchAndWriteMiniDumpExReturnsInt( FnWMainIntRet pfn, int argc, tchar *argv[], ECatchAndWriteMinidumpAction eAction )
|
||
|
|
{
|
||
|
|
CatchAndWriteContext_t ctx;
|
||
|
|
ctx.Set( k_eSCatchAndWriteFunctionTypeWMainIntReg, eAction, (void *)pfn, &argc, &argv, NULL );
|
||
|
|
return CatchAndWriteMiniDump_Impl( ctx );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
// Purpose: Catches and writes out any exception throw by the specified function
|
||
|
|
// Input: pfn - Function to call within protective exception block
|
||
|
|
// pv - Void pointer to pass that function
|
||
|
|
// eAction - Specifies what to do if it catches an exception
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
void CatchAndWriteMiniDumpExForVoidPtrFn( FnVoidPtrFn pfn, void *pv, ECatchAndWriteMinidumpAction eAction )
|
||
|
|
{
|
||
|
|
CatchAndWriteContext_t ctx;
|
||
|
|
ctx.Set( k_eSCatchAndWriteFunctionTypeVoidPtr, eAction, (void *)pfn, NULL, NULL, &pv );
|
||
|
|
CatchAndWriteMiniDump_Impl( ctx );
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
// Purpose: Catches and writes out any exception throw by the specified function
|
||
|
|
// Input: pfn - Function to call within protective exception block
|
||
|
|
// pv - Void pointer to pass that function
|
||
|
|
// bExitQuietly - If true (for client) just exit after mindump, with no visible error for user
|
||
|
|
// If false, re-throws.
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
void CatchAndWriteMiniDumpForVoidPtrFn( FnVoidPtrFn pfn, void *pv, bool bExitQuietly )
|
||
|
|
{
|
||
|
|
return CatchAndWriteMiniDumpExForVoidPtrFn( pfn, pv, bExitQuietly ? k_ECatchAndWriteMiniDumpAbort : k_ECatchAndWriteMiniDumpReThrow );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
Call this function to ensure that your program actually crashes when it crashes.
|
||
|
|
|
||
|
|
Oh my god.
|
||
|
|
|
||
|
|
When 64-bit Windows came out it turns out that it wasn't possible to throw
|
||
|
|
and catch exceptions from user-mode, through kernel-mode, and back to user
|
||
|
|
mode. Therefore, for crashes that happen in kernel callbacks such as Window
|
||
|
|
procs Microsoft had to decide either to always crash when an exception
|
||
|
|
is thrown (including an SEH such as an access violation) or else always silently
|
||
|
|
swallow the exception.
|
||
|
|
|
||
|
|
They chose badly.
|
||
|
|
|
||
|
|
Therefore, for the last five or so years, programs on 64-bit Windows have been
|
||
|
|
silently swallowing *some* exceptions. As a concrete example, consider this code:
|
||
|
|
|
||
|
|
case WM_PAINT:
|
||
|
|
{
|
||
|
|
hdc = BeginPaint(hWnd, &ps);
|
||
|
|
char* p = new char;
|
||
|
|
*(int*)0 = 0;
|
||
|
|
delete p;
|
||
|
|
EndPaint(hWnd, &ps);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
It's in a WindowProc handling a paint message so it will generally be called from
|
||
|
|
kernel mode. Therefore the crash in the middle of it is, by default, 'handled' for
|
||
|
|
us. The "delete p;" and EndPaint() never happen. This means that the process is
|
||
|
|
left in an indeterminate state. It also means that our error reporting never sees
|
||
|
|
the exception. It is effectively as though there is a __try/__except handler at the
|
||
|
|
kernel boundary and any crashes cause the stack to be unwound (without destructors
|
||
|
|
being run) to the kernel boundary where execution continues.
|
||
|
|
|
||
|
|
Charming.
|
||
|
|
|
||
|
|
The fix is to use the Get/SetProcessUserModeExceptionPolicy API to tell Windows
|
||
|
|
that we don't want to struggle on after crashing.
|
||
|
|
|
||
|
|
For more scary details see this article. It actually suggests using the compatibility
|
||
|
|
manifest, but that does not appear to work.
|
||
|
|
http://blog.paulbetts.org/index.php/2010/07/20/the-case-of-the-disappearing-onload-exception-user-mode-callback-exceptions-in-x64/
|
||
|
|
*/
|
||
|
|
void EnableCrashingOnCrashes()
|
||
|
|
{
|
||
|
|
typedef BOOL (WINAPI *tGetProcessUserModeExceptionPolicy)(LPDWORD lpFlags);
|
||
|
|
typedef BOOL (WINAPI *tSetProcessUserModeExceptionPolicy)(DWORD dwFlags);
|
||
|
|
#define PROCESS_CALLBACK_FILTER_ENABLED 0x1
|
||
|
|
|
||
|
|
HMODULE kernel32 = LoadLibraryA("kernel32.dll");
|
||
|
|
tGetProcessUserModeExceptionPolicy pGetProcessUserModeExceptionPolicy = (tGetProcessUserModeExceptionPolicy)GetProcAddress(kernel32, "GetProcessUserModeExceptionPolicy");
|
||
|
|
tSetProcessUserModeExceptionPolicy pSetProcessUserModeExceptionPolicy = (tSetProcessUserModeExceptionPolicy)GetProcAddress(kernel32, "SetProcessUserModeExceptionPolicy");
|
||
|
|
if (pGetProcessUserModeExceptionPolicy && pSetProcessUserModeExceptionPolicy)
|
||
|
|
{
|
||
|
|
DWORD dwFlags;
|
||
|
|
if (pGetProcessUserModeExceptionPolicy(&dwFlags))
|
||
|
|
{
|
||
|
|
pSetProcessUserModeExceptionPolicy(dwFlags & ~PROCESS_CALLBACK_FILTER_ENABLED); // turn off bit 1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
PLATFORM_INTERFACE void WriteMiniDump( const char *pszFilenameSuffix )
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
PLATFORM_INTERFACE void CatchAndWriteMiniDump( FnWMain pfn, int argc, tchar *argv[] )
|
||
|
|
{
|
||
|
|
pfn( argc, argv );
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
#elif defined(_X360 )
|
||
|
|
PLATFORM_INTERFACE void WriteMiniDump( const char *pszFilenameSuffix )
|
||
|
|
{
|
||
|
|
DmCrashDump(false);
|
||
|
|
}
|
||
|
|
|
||
|
|
#else // !_WIN32
|
||
|
|
#include "tier0/minidump.h"
|
||
|
|
|
||
|
|
PLATFORM_INTERFACE void WriteMiniDump( const char *pszFilenameSuffix )
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
PLATFORM_INTERFACE void CatchAndWriteMiniDump( FnWMain pfn, int argc, tchar *argv[] )
|
||
|
|
{
|
||
|
|
pfn( argc, argv );
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// User minidump stream info comment strings.
|
||
|
|
//
|
||
|
|
// Single header string of 512 bytes set via MinidumpUserStreamInfoSetHeader.
|
||
|
|
static char g_UserStreamInfoHeader[ 512 ];
|
||
|
|
// Array of 32 round robin 128 byte strings set via MinidumpUserStreamInfoAppend.
|
||
|
|
static char g_UserStreamInfo[ 64 ][ 128 ];
|
||
|
|
static int g_UserStreamInfoIndex = 0;
|
||
|
|
|
||
|
|
// Set the single g_UserStreamInfoHeader string.
|
||
|
|
void MinidumpUserStreamInfoSetHeader( const char *pFormat, ... )
|
||
|
|
{
|
||
|
|
va_list marker;
|
||
|
|
|
||
|
|
va_start( marker, pFormat );
|
||
|
|
_vsnprintf( g_UserStreamInfoHeader, ARRAYSIZE( g_UserStreamInfoHeader ), pFormat, marker );
|
||
|
|
g_UserStreamInfoHeader[ ARRAYSIZE( g_UserStreamInfoHeader ) - 1 ] = 0;
|
||
|
|
va_end( marker );
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set the next comment in the g_UserStreamInfo array.
|
||
|
|
void MinidumpUserStreamInfoAppend( const char *pFormat, ... )
|
||
|
|
{
|
||
|
|
va_list marker;
|
||
|
|
char *pData = g_UserStreamInfo[ g_UserStreamInfoIndex ];
|
||
|
|
const int DataSize = ARRAYSIZE( g_UserStreamInfo[ g_UserStreamInfoIndex ] );
|
||
|
|
|
||
|
|
// Add tick count just so we have a general idea of when this event happened.
|
||
|
|
_snprintf( pData, DataSize, "[%x]", Plat_MSTime() );
|
||
|
|
pData[ DataSize - 1 ] = 0;
|
||
|
|
size_t HeaderLen = strlen( pData );
|
||
|
|
|
||
|
|
va_start( marker, pFormat );
|
||
|
|
_vsnprintf( pData + HeaderLen, DataSize - HeaderLen, pFormat, marker );
|
||
|
|
pData[ DataSize - 1 ] = 0;
|
||
|
|
va_end( marker );
|
||
|
|
|
||
|
|
// Bump up index, and go back to 0 if we've hit the end.
|
||
|
|
g_UserStreamInfoIndex++;
|
||
|
|
if( g_UserStreamInfoIndex >= ARRAYSIZE( g_UserStreamInfo ) )
|
||
|
|
{
|
||
|
|
g_UserStreamInfoIndex = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Retrieve the string given the Index.
|
||
|
|
// Index 0: header string
|
||
|
|
// Index 1+: comment string
|
||
|
|
// Returns NULL when you've reached the end of the comment string array
|
||
|
|
// Empty strings ("\0") can be returned if comment hasn't been set
|
||
|
|
const char *MinidumpUserStreamInfoGet( int Index )
|
||
|
|
{
|
||
|
|
if( ( Index < 0 ) || ( Index >= (ARRAYSIZE( g_UserStreamInfo ) + 1) ) ) //+1 because we map 0 to the header
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
if( Index == 0 )
|
||
|
|
return g_UserStreamInfoHeader;
|
||
|
|
|
||
|
|
Index = ( (Index + (ARRAYSIZE( g_UserStreamInfo ) - 1)) + //subtract 1 in a way that circularly wraps. Since 0 maps to the header, the comment indices are 1 based
|
||
|
|
g_UserStreamInfoIndex ) //start with our oldest comment
|
||
|
|
% ARRAYSIZE( g_UserStreamInfo ); //circular buffer wrapping
|
||
|
|
|
||
|
|
return g_UserStreamInfo[ Index ];
|
||
|
|
}
|
||
|
|
|
||
|
|
|