2 * glibc threading support
4 * Copyright 2003 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "wine/port.h"
27 #ifdef HAVE_SYS_MMAN_H
28 # include <sys/mman.h>
37 #include "wine/library.h"
40 static void *xmalloc( size_t size )
45 if (!(res = malloc( size )))
47 fprintf( stderr, "wine: virtual memory exhausted\n" );
53 /* separate thread to check for NPTL and TLS features */
54 static void *needs_pthread( void *arg )
58 if (tid != -1 && tid != getpid()) return (void *)1;
59 /* check for TLS glibc */
60 return (void *)(wine_get_gs() != 0);
63 /* return the name of the Wine threading variant to use */
64 static const char *get_threading(void)
69 pthread_create( &id, NULL, needs_pthread, NULL );
70 pthread_join( id, &ret );
71 return ret ? "wine-pthread" : "wine-kthread";
74 /* build a new full path from the specified path and name */
75 static const char *build_new_path( const char *path, const char *name )
80 if (!(p = strrchr( path, '/' ))) return name;
82 ret = xmalloc( (p - path) + strlen(name) + 1 );
83 memcpy( ret, path, p - path );
84 strcpy( ret + (p - path), name );
88 static void check_vmsplit( void *stack )
90 if (stack < (void *)0x80000000)
92 /* if the stack is below 0x80000000, assume we can safely try a munmap there */
93 if (munmap( (void *)0x80000000, 1 ) == -1 && errno == EINVAL)
95 "Warning: memory above 0x80000000 doesn't seem to be accessible.\n"
96 "Wine requires a 3G/1G user/kernel memory split to work properly.\n" );
100 /**********************************************************************
103 int main( int argc, char *argv[] )
105 const char *loader = getenv( "WINELOADER" );
106 const char *threads = get_threading();
107 const char *new_argv0 = build_new_path( argv[0], threads );
109 wine_init_argv0_path( new_argv0 );
113 /* update WINELOADER with the new name */
114 const char *new_name = build_new_path( loader, threads );
115 char *new_loader = xmalloc( sizeof("WINELOADER=") + strlen(new_name) );
116 strcpy( new_loader, "WINELOADER=" );
117 strcat( new_loader, new_name );
118 putenv( new_loader );
122 check_vmsplit( &argc );
123 wine_exec_wine_binary( NULL, argv, loader );
124 fprintf( stderr, "wine: could not exec %s\n", threads );