Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: A redirection tool that allows the DLLs to reside elsewhere.
//
//=====================================================================================//
#if defined( _WIN32 ) && !defined( _X360 )
#include <windows.h>
#include <stdio.h>
#include <assert.h>
#include <direct.h>
#endif
#if defined( _X360 )
#define _XBOX
#include <xtl.h>
#include <xbdm.h>
#include <stdio.h>
#include <assert.h>
#include "xbox\xbox_core.h"
#include "xbox\xbox_launch.h"
#endif
#ifdef POSIX
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <limits.h>
#include <string.h>
#define MAX_PATH PATH_MAX
#endif
#include "tier0/basetypes.h"
#ifdef WIN32
typedef int (*LauncherMain_t)( HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow );
#elif POSIX
typedef int (*LauncherMain_t)( int argc, char **argv );
#else
#error
#endif
#ifdef WIN32
// hinting the nvidia driver to use the dedicated graphics card in an optimus configuration
// for more info, see: http://developer.download.nvidia.com/devzone/devcenter/gamegraphics/files/OptimusRenderingPolicies.pdf
extern "C" { _declspec( dllexport ) DWORD NvOptimusEnablement = 0x00000001; }
// same thing for AMD GPUs using v13.35 or newer drivers
extern "C" { __declspec( dllexport ) int AmdPowerXpressRequestHighPerformance = 1; }
#endif
//-----------------------------------------------------------------------------
// Purpose: Return the directory where this .exe is running from
// Output : char
//-----------------------------------------------------------------------------
#if !defined( _X360 )
static char *GetBaseDir( const char *pszBuffer )
{
static char basedir[ MAX_PATH ];
char szBuffer[ MAX_PATH ];
size_t j;
char *pBuffer = NULL;
strcpy( szBuffer, pszBuffer );
pBuffer = strrchr( szBuffer,'\\' );
if ( pBuffer )
{
*(pBuffer+1) = '\0';
}
strcpy( basedir, szBuffer );
j = strlen( basedir );
if (j > 0)
{
if ( ( basedir[ j-1 ] == '\\' ) ||
( basedir[ j-1 ] == '/' ) )
{
basedir[ j-1 ] = 0;
}
}
return basedir;
}
#ifdef WIN32
int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
{
// Must add 'bin' to the path....
char* pPath = getenv("PATH");
// Use the .EXE name to determine the root directory
char moduleName[ MAX_PATH ];
char szBuffer[4096];
if ( !GetModuleFileName( hInstance, moduleName, MAX_PATH ) )
{
MessageBox( 0, "Failed calling GetModuleFileName", "Launcher Error", MB_OK );
return 0;
}
// Get the root directory the .exe is in
char* pRootDir = GetBaseDir( moduleName );
#ifdef _DEBUG
int len =
#endif
_snprintf( szBuffer, sizeof( szBuffer ), "PATH=%s\\bin\\;%s", pRootDir, pPath );
szBuffer[sizeof( szBuffer ) - 1] = '\0';
assert( len < sizeof( szBuffer ) );
_putenv( szBuffer );
// Assemble the full path to our "launcher.dll"
_snprintf( szBuffer, sizeof( szBuffer ), "%s\\bin\\launcher.dll", pRootDir );
szBuffer[sizeof( szBuffer ) - 1] = '\0';
// STEAM OK ... filesystem not mounted yet
#if defined(_X360)
HINSTANCE launcher = LoadLibrary( szBuffer );
#else
HINSTANCE launcher = LoadLibraryEx( szBuffer, NULL, LOAD_WITH_ALTERED_SEARCH_PATH );
#endif
if ( !launcher )
{
char *pszError;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&pszError, 0, NULL);
char szBuf[1024];
_snprintf(szBuf, sizeof( szBuf ), "Failed to load the launcher DLL:\n\n%s", pszError);
szBuf[sizeof( szBuf ) - 1] = '\0';
MessageBox( 0, szBuf, "Launcher Error", MB_OK );
LocalFree(pszError);
return 0;
}
LauncherMain_t main = (LauncherMain_t)GetProcAddress( launcher, "LauncherMain" );
return main( hInstance, hPrevInstance, lpCmdLine, nCmdShow );
}
#elif defined (POSIX)
#if defined( LINUX )
#include <fcntl.h>
static bool IsDebuggerPresent( int time )
{
// Need to get around the __wrap_open() stuff. Just find the open symbol
// directly and use it...
typedef int (open_func_t)( const char *pathname, int flags, mode_t mode );
open_func_t *open_func = (open_func_t *)dlsym( RTLD_NEXT, "open" );
if ( open_func )
{
for ( int i = 0; i < time; i++ )
{
int tracerpid = -1;
int fd = (*open_func)( "/proc/self/status", O_RDONLY, S_IRUSR );
if (fd >= 0)
{
char buf[ 4096 ];
static const char tracerpid_str[] = "TracerPid:";
const int len = read( fd, buf, sizeof(buf) - 1 );
if ( len > 0 )
{
buf[ len ] = 0;
const char *str = strstr( buf, tracerpid_str );
tracerpid = str ? atoi( str + sizeof( tracerpid_str ) ) : -1;
}
close( fd );
}
if ( tracerpid > 0 )
return true;
sleep( 1 );
}
}
return false;
}
static void WaitForDebuggerConnect( int argc, char *argv[], int time )
{
for ( int i = 1; i < argc; i++ )
{
if ( strstr( argv[i], "-wait_for_debugger" ) )
{
printf( "\nArg -wait_for_debugger found.\nWaiting %dsec for debugger...\n", time );
printf( " pid = %d\n", getpid() );
if ( IsDebuggerPresent( time ) )
printf("Debugger connected...\n\n");
break;
}
}
}
#else
static void WaitForDebuggerConnect( int argc, char *argv[], int time )
{
}
#endif // !LINUX
int main( int argc, char *argv[] )
{
void *launcher = dlopen( "bin/launcher" DLL_EXT_STRING, RTLD_NOW );
if ( !launcher )
{
fprintf( stderr, "Failed to load the launcher\n" );
return 0;
}
LauncherMain_t main = (LauncherMain_t)dlsym( launcher, "LauncherMain" );
if ( !main )
{
fprintf( stderr, "Failed to load the launcher entry proc\n" );
return 0;
}
#if defined(__clang__) && !defined(OSX)
// When building with clang we absolutely need the allocator to always
// give us 16-byte aligned memory because if any objects are tagged as
// being 16-byte aligned then clang will generate SSE instructions to move
// and initialize them, and an allocator that does not respect the
// contract will lead to crashes. On Linux we normally use the default
// allocator which does not give us this alignment guarantee.
// The google tcmalloc allocator gives us this guarantee.
// Test the current allocator to make sure it gives us the required alignment.
void* pointers[20];
for (int i = 0; i < ARRAYSIZE(pointers); ++i)
{
void* p = malloc( 16 );
pointers[ i ] = p;
if ( ( (size_t)p ) & 0xF )
{
printf( "%p is not 16-byte aligned. Aborting.\n", p );
printf( "Pass /define:CLANG to VPC to correct this.\n" );
return -10;
}
}
for (int i = 0; i < ARRAYSIZE(pointers); ++i)
{
if ( pointers[ i ] )
free( pointers[ i ] );
}
if ( __has_feature(address_sanitizer) )
{
printf( "Address sanitizer is enabled.\n" );
}
else
{
printf( "No address sanitizer!\n" );
}
#endif
WaitForDebuggerConnect( argc, argv, 30 );
return main( argc, argv );
}
#else
#error
#endif // WIN32 || POSIX
#else // X360
//-----------------------------------------------------------------------------
// 360 Quick and dirty command line parsing. Returns true if key found,
// false otherwise. Caller can optionally get next argument.
//-----------------------------------------------------------------------------
bool ParseCommandLineArg( const char *pCmdLine, const char* pKey, char* pValueBuff = NULL, int valueBuffSize = 0 )
{
int keyLen = (int)strlen( pKey );
const char* pArg = pCmdLine;
for ( ;; )
{
// scan for match
pArg = strstr( (char*)pArg, pKey );
if ( !pArg )
{
return false;
}
// found, but could be a substring
if ( pArg[keyLen] == '\0' || pArg[keyLen] == ' ' )
{
// exact match
break;
}
pArg += keyLen;
}
if ( pValueBuff )
{
// caller wants next token
// skip past key and whitespace
pArg += keyLen;
while ( *pArg == ' ' )
{
pArg++;
}
int i;
for ( i=0; i<valueBuffSize; i++ )
{
pValueBuff[i] = *pArg;
if ( *pArg == '\0' || *pArg == ' ' )
break;
pArg++;
}
pValueBuff[i] = '\0';
}
return true;
}
//-----------------------------------------------------------------------------
// 360 Quick and dirty command line arg stripping.
//-----------------------------------------------------------------------------
void StripCommandLineArg( const char *pCmdLine, char *pNewCmdLine, const char *pStripArg )
{
// cannot operate in place
assert( pCmdLine != pNewCmdLine );
int numTotal = strlen( pCmdLine ) + 1;
const char* pArg = strstr( pCmdLine, pStripArg );
if ( !pArg )
{
strcpy( pNewCmdLine, pCmdLine );
return;
}
int numDiscard = strlen( pStripArg );
while ( pArg[numDiscard] && ( pArg[numDiscard] != '-' && pArg[numDiscard] != '+' ) )
{
// eat whitespace up to the next argument
numDiscard++;
}
memcpy( pNewCmdLine, pCmdLine, pArg - pCmdLine );
memcpy( pNewCmdLine + ( pArg - pCmdLine ), (void*)&pArg[numDiscard], numTotal - ( pArg + numDiscard - pCmdLine ) );
// ensure we don't leave any trailing whitespace, occurs if last arg is stripped
int len = strlen( pNewCmdLine );
while ( len > 0 && pNewCmdLine[len-1] == ' ' )
{
len--;
}
pNewCmdLine[len] = '\0';
}
//-----------------------------------------------------------------------------
// 360 Conditional spew
//-----------------------------------------------------------------------------
void Spew( const char *pFormat, ... )
{
#if defined( _DEBUG )
char msg[2048];
va_list argptr;
va_start( argptr, pFormat );
vsprintf( msg, pFormat, argptr );
va_end( argptr );
OutputDebugString( msg );
#endif
}
//-----------------------------------------------------------------------------
// Adheres to possible xbox exclude paths in for -dvddev mode.
//-----------------------------------------------------------------------------
bool IsBinExcluded( const char *pRemotePath, bool *pExcludeAll )
{
*pExcludeAll = false;
bool bIsBinExcluded = false;
// find optional exclusion file
char szExcludeFile[MAX_PATH];
sprintf( szExcludeFile, "%s\\xbox_exclude_paths.txt", pRemotePath );
HANDLE hFile = CreateFile( szExcludeFile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL );
if ( hFile != INVALID_HANDLE_VALUE )
{
int len = GetFileSize( hFile, NULL );
if ( len > 0 )
{
char *pBuffer = ( char *)malloc( len + 1 );
memset( pBuffer, 0, len+1 );
DWORD numBytesRead;
if ( ReadFile( hFile, pBuffer, len, &numBytesRead, NULL ) )
{
strlwr( pBuffer );
if ( strstr( pBuffer, "\"*\"" ) )
{
*pExcludeAll = true;
bIsBinExcluded = true;
}
else if ( strstr( pBuffer, "\"\\bin\"" ) )
{
// override file either specifies an exclusion of the root or the bin directory
bIsBinExcluded = true;
}
}
free( pBuffer );
}
CloseHandle( hFile );
}
return bIsBinExcluded;
}
//-----------------------------------------------------------------------------
// Get the new entry point and command line
//-----------------------------------------------------------------------------
LauncherMain_t GetLaunchEntryPoint( char *pNewCommandLine )
{
HMODULE hModule;
char *pCmdLine;
// determine source of our invocation, internal or external
// a valid launch payload will have an embedded command line
// command line could be from internal restart in dev or retail mode
CXboxLaunch xboxLaunch;
int payloadSize;
unsigned int launchID;
char *pPayload;
bool bInternalRestart = xboxLaunch.GetLaunchData( &launchID, (void**)&pPayload, &payloadSize );
if ( !bInternalRestart || !payloadSize || launchID != VALVE_LAUNCH_ID )
{
// launch is not ours
if ( launchID == LAUNCH_DATA_DEMO_ID )
{
// data is a demo blob, not ready to handle yet, so ignore
}
// could be first time, get command line from system
pCmdLine = GetCommandLine();
if ( !stricmp( pCmdLine, "\"default.xex\"" ) )
{
// matches retail xex and no arguments, mut be first time retail launch
pCmdLine = "default.xex -dvd";
#if defined( _MEMTEST )
pCmdLine = "default.xex -dvd +mat_picmip 2";
#endif
}
}
else
{
// get embedded command line from payload
pCmdLine = pPayload;
}
int launchFlags = xboxLaunch.GetLaunchFlags();
#if !defined( _CERT )
if ( launchFlags & LF_ISDEBUGGING )
{
while ( !DmIsDebuggerPresent() )
{
}
Sleep( 1000 );
Spew( "Resuming debug session.\n" );
}
#endif
if ( launchID == VALVE_LAUNCH_ID )
{
// unforunately, the xbox erases its internal store upon first fetch
// must re-establish it so the payload that contains other data (past command line) can be accessed by the game
// the launch data will be owned by tier0 and supplied to game
xboxLaunch.SetLaunchData( pPayload, payloadSize, launchFlags );
}
// The 360 has no paths and therefore the xex must reside in the same location as the dlls.
// Only the xex must reside locally, on the box, but the dlls can be mounted from the remote share.
// Resolve all known implicitly loaded dlls to be explicitly loaded now to allow their remote location.
const char *pImplicitDLLs[] =
{
"tier0_360.dll",
"vstdlib_360.dll",
"vxbdm_360.dll",
// last slot reserved, as dynamic, used to determine which application gets launched
"???"
};
// Corresponds to pImplicitDLLs. A dll load failure is only an error if that dll is tagged as required.
const bool bDllRequired[] =
{
true, // tier0
true, // vstdlib
false, // vxbdm
true, // ???
};
char gameName[32];
bool bDoChooser = false;
if ( !ParseCommandLineArg( pCmdLine, "-game", gameName, sizeof( gameName ) ) )
{
// usage of remote share requires a game (default to hl2)
// remote share mandates an absolute game path which is detected by the host
strcpy( gameName, "hl2" );
bDoChooser = true;
}
else
{
// sanitize a possible absolute game path back to expected game name
char *pSlash = strrchr( gameName, '\\' );
if ( pSlash )
{
memcpy( gameName, pSlash+1, strlen( pSlash+1 )+1 );
}
}
char shareName[32];
if ( !ParseCommandLineArg( pCmdLine, "-share", shareName, sizeof( shareName ) ) )
{
// usage of remote share requires a share name for the game folder (default to game)
strcpy( shareName, "game" );
}
if ( ( xboxLaunch.GetLaunchFlags() & LF_EXITFROMGAME ) && !( xboxLaunch.GetLaunchFlags() & LF_GAMERESTART ) )
{
// exiting from a game back to chooser
bDoChooser = true;
}
// If we're restarting from an invite, we're funneling into TF2
if ( launchFlags & LF_INVITERESTART )
{
strcpy( gameName, "tf" );
bDoChooser = false;
}
// resolve which application gets launched
if ( bDoChooser )
{
// goto high level 1 of N game selector
pImplicitDLLs[ARRAYSIZE( pImplicitDLLs )-1] = "AppChooser_360.dll";
}
else
{
pImplicitDLLs[ARRAYSIZE( pImplicitDLLs )-1] = "launcher_360.dll";
}
// the base path is the where the game is predominantly anchored
char basePath[128];
// a remote path is for development mode only, on the host pc
char remotePath[128];
#if !defined( _CERT )
if ( !ParseCommandLineArg( pCmdLine, "-dvd" ) )
{
// development mode only, using host pc
// auto host name detection can be overriden via command line
char hostName[32];
if ( !ParseCommandLineArg( pCmdLine, "-host", hostName, sizeof( hostName ) ) )
{
// auto detect, the 360 machine name must be <HostPC>_360
DWORD length = sizeof( hostName );
HRESULT hr = DmGetXboxName( hostName, &length );
if ( hr != XBDM_NOERR )
{
Spew( "FATAL: Could not get xbox name: %s\n", hostName );
return NULL;
}
char *p = strstr( hostName, "_360" );
if ( !p )
{
Spew( "FATAL: Xbox name must be <HostPC>_360\n" );
return NULL;
}
*p = '\0';
}
sprintf( remotePath, "net:\\smb\\%s\\%s", hostName, shareName );
// network remote shares seem to be buggy, but always manifest as the gamedir being unaccessible
// validate now, otherwise longer wait until process eventually fails
char szFullPath[MAX_PATH];
WIN32_FIND_DATA findData;
sprintf( szFullPath, "%s\\%s\\*.*", remotePath, gameName );
HANDLE hFindFile = FindFirstFile( szFullPath, &findData );
if ( hFindFile == INVALID_HANDLE_VALUE )
{
Spew( "*******************************************************************\n" );
Spew( "FATAL: Access to remote share '%s' on host PC lost. Forcing cold reboot.\n", szFullPath );
Spew( "FATAL: After reboot completes to dashboard, restart application.\n" );
Spew( "*******************************************************************\n" );
DmRebootEx( DMBOOT_COLD, NULL, NULL, NULL );
return NULL;
}
FindClose( hFindFile );
}
#endif
char *searchPaths[2];
searchPaths[0] = basePath;
int numSearchPaths = 1;
bool bExcludeAll = false;
bool bAddRemotePath = false;
if ( ParseCommandLineArg( pCmdLine, "-dvd" ) )
{
// game runs from dvd only
strcpy( basePath, "d:" );
}
else if ( ParseCommandLineArg( pCmdLine, "-dvddev" ) )
{
// dvd development, game runs from dvd and can fall through to access remote path
// check user configuration for possible \bin exclusion from Xbox HDD
strcpy( basePath, "d:" );
if ( IsBinExcluded( remotePath, &bExcludeAll ) )
{
searchPaths[0] = remotePath;
numSearchPaths = 1;
}
else
{
searchPaths[0] = basePath;
searchPaths[1] = remotePath;
numSearchPaths = 2;
}
if ( bExcludeAll )
{
// override, user has excluded everything, game runs from remote path only
strcpy( basePath, remotePath );
}
else
{
// -dvddev appends a -remote <remotepath> for the filesystem to detect
bAddRemotePath = true;
}
}
else
{
// game runs from remote path only
strcpy( basePath, remotePath );
}
// load all the dlls specified
char dllPath[MAX_PATH];
for ( int i=0; i<ARRAYSIZE( pImplicitDLLs ); i++ )
{
hModule = NULL;
for ( int j = 0; j < numSearchPaths; j++ )
{
sprintf( dllPath, "%s\\bin\\%s", searchPaths[j], pImplicitDLLs[i] );
hModule = LoadLibrary( dllPath );
if ( hModule )
{
break;
}
}
if ( !hModule && bDllRequired[i] )
{
Spew( "FATAL: Failed to load dll: '%s'\n", dllPath );
return NULL;
}
}
char cleanCommandLine[512];
char tempCommandLine[512];
StripCommandLineArg( pCmdLine, tempCommandLine, "-basedir" );
StripCommandLineArg( tempCommandLine, cleanCommandLine, "-game" );
if ( bAddRemotePath )
{
// the remote path is only added for -dvddev mode
StripCommandLineArg( cleanCommandLine, tempCommandLine, "-remote" );
sprintf( cleanCommandLine, "%s -remote %s", tempCommandLine, remotePath );
}
// set the alternate command line
sprintf( pNewCommandLine, "%s -basedir %s -game %s\\%s", cleanCommandLine, basePath, basePath, gameName );
// the 'main' export is guaranteed to be at ordinal 1
// the library is already loaded, this just causes a lookup that will resolve against the shortname
const char *pLaunchDllName = pImplicitDLLs[ARRAYSIZE( pImplicitDLLs )-1];
hModule = LoadLibrary( pLaunchDllName );
LauncherMain_t main = (LauncherMain_t)GetProcAddress( hModule, (LPSTR)1 );
if ( !main )
{
Spew( "FATAL: 'LauncherMain' entry point not found in %s\n", pLaunchDllName );
return NULL;
}
return main;
}
//-----------------------------------------------------------------------------
// 360 Application Entry Point.
//-----------------------------------------------------------------------------
VOID __cdecl main()
{
char newCmdLine[512];
LauncherMain_t newMain = GetLaunchEntryPoint( newCmdLine );
if ( newMain )
{
// 360 has no concept of instances, spoof one
newMain( (HINSTANCE)1, (HINSTANCE)0, (LPSTR)newCmdLine, 0 );
}
}
#endif