mirror of
https://github.com/reactos/wine.git
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127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/*
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* glibc threading support
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*
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* Copyright 2003 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_SYS_MMAN_H
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# include <sys/mman.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_PTHREAD_H
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# include <pthread.h>
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#endif
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#include "wine/library.h"
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/* malloc wrapper */
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static void *xmalloc( size_t size )
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{
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void *res;
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if (!size) size = 1;
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if (!(res = malloc( size )))
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{
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fprintf( stderr, "wine: virtual memory exhausted\n" );
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exit(1);
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}
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return res;
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}
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/* separate thread to check for NPTL and TLS features */
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static void *needs_pthread( void *arg )
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{
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pid_t tid = gettid();
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/* check for NPTL */
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if (tid != -1 && tid != getpid()) return (void *)1;
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/* check for TLS glibc */
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return (void *)(wine_get_gs() != 0);
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}
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/* return the name of the Wine threading variant to use */
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static const char *get_threading(void)
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{
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pthread_t id;
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void *ret;
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pthread_create( &id, NULL, needs_pthread, NULL );
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pthread_join( id, &ret );
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return ret ? "wine-pthread" : "wine-kthread";
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}
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/* build a new full path from the specified path and name */
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static const char *build_new_path( const char *path, const char *name )
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{
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const char *p;
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char *ret;
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if (!(p = strrchr( path, '/' ))) return name;
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p++;
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ret = xmalloc( (p - path) + strlen(name) + 1 );
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memcpy( ret, path, p - path );
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strcpy( ret + (p - path), name );
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return ret;
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}
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static void check_vmsplit( void *stack )
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{
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if (stack < (void *)0x80000000)
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{
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/* if the stack is below 0x80000000, assume we can safely try a munmap there */
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if (munmap( (void *)0x80000000, 1 ) == -1 && errno == EINVAL)
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fprintf( stderr,
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"Warning: memory above 0x80000000 doesn't seem to be accessible.\n"
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"Wine requires a 3G/1G user/kernel memory split to work properly.\n" );
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}
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}
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/**********************************************************************
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* main
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*/
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int main( int argc, char *argv[] )
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{
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const char *loader = getenv( "WINELOADER" );
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const char *threads = get_threading();
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const char *new_argv0 = build_new_path( argv[0], threads );
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wine_init_argv0_path( new_argv0 );
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if (loader)
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{
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/* update WINELOADER with the new name */
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const char *new_name = build_new_path( loader, threads );
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char *new_loader = xmalloc( sizeof("WINELOADER=") + strlen(new_name) );
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strcpy( new_loader, "WINELOADER=" );
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strcat( new_loader, new_name );
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putenv( new_loader );
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loader = new_name;
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}
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check_vmsplit( &argc );
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wine_exec_wine_binary( NULL, argv, loader );
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fprintf( stderr, "wine: could not exec %s\n", threads );
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exit(1);
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}
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