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