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>
30 #ifdef HAVE_SYS_RESOURCE_H
31 # include <sys/resource.h>
40 #include "wine/library.h"
43 static void *xmalloc( size_t size )
48 if (!(res = malloc( size )))
50 fprintf( stderr, "wine: virtual memory exhausted\n" );
56 /* separate thread to check for NPTL and TLS features */
57 static void *needs_pthread( void *arg )
62 if (tid != -1 && tid != getpid()) return (void *)1;
63 /* check for TLS glibc */
64 if (wine_get_gs() != 0) return (void *)1;
65 /* check for exported epoll_create to detect new glibc versions without TLS */
66 if (wine_dlsym( RTLD_DEFAULT, "epoll_create", NULL, 0 ))
68 "wine: glibc >= 2.3 without NPTL or TLS is not a supported combination.\n"
69 " Please upgrade to a glibc with NPTL support.\n" );
72 "wine: Your C library is too old. You need at least glibc 2.3 with NPTL support.\n" );
73 if (!(loader = getenv( "WINELOADER" )) || !strstr( loader, "wine-kthread" ))
78 /* return the name of the Wine threading variant to use */
79 static const char *get_threading(void)
84 pthread_create( &id, NULL, needs_pthread, NULL );
85 pthread_join( id, &ret );
86 return ret ? "wine-pthread" : "wine-kthread";
89 /* build a new full path from the specified path and name */
90 static const char *build_new_path( const char *path, const char *name )
95 if (!(p = strrchr( path, '/' ))) return name;
97 ret = xmalloc( (p - path) + strlen(name) + 1 );
98 memcpy( ret, path, p - path );
99 strcpy( ret + (p - path), name );
103 static void check_vmsplit( void *stack )
105 if (stack < (void *)0x80000000)
107 /* if the stack is below 0x80000000, assume we can safely try a munmap there */
108 if (munmap( (void *)0x80000000, 1 ) == -1 && errno == EINVAL)
110 "Warning: memory above 0x80000000 doesn't seem to be accessible.\n"
111 "Wine requires a 3G/1G user/kernel memory split to work properly.\n" );
115 static void set_max_limit( int limit )
117 struct rlimit rlimit;
119 if (!getrlimit( limit, &rlimit ))
121 rlimit.rlim_cur = rlimit.rlim_max;
122 setrlimit( limit, &rlimit );
127 /**********************************************************************
130 int main( int argc, char *argv[] )
132 const char *loader = getenv( "WINELOADER" );
133 const char *threads = get_threading();
134 const char *new_argv0 = build_new_path( argv[0], threads );
136 wine_init_argv0_path( new_argv0 );
138 /* set the address space limit before starting the preloader */
139 set_max_limit( RLIMIT_AS );
143 /* update WINELOADER with the new name */
144 const char *new_name = build_new_path( loader, threads );
145 char *new_loader = xmalloc( sizeof("WINELOADER=") + strlen(new_name) );
146 strcpy( new_loader, "WINELOADER=" );
147 strcat( new_loader, new_name );
148 putenv( new_loader );
152 check_vmsplit( &argc );
153 wine_exec_wine_binary( NULL, argv, loader );
154 fprintf( stderr, "wine: could not exec %s\n", threads );