loader/pthread.c

   1 /*
   2  * Wine threading routines using the pthread library
   3  *
   4  * Copyright 2003 Alexandre Julliard
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <assert.h>
  25 #include <stdlib.h>
  26 #include <signal.h>
  27 #ifdef HAVE_UNISTD_H
  28 # include <unistd.h>
  29 #endif
  30 #include <string.h>
  31 #include <sys/types.h>
  32 #ifdef HAVE_SYS_MMAN_H
  33 #include <sys/mman.h>
  34 #endif
  35 #ifdef HAVE_MACH_MACH_H
  36 #include <mach/mach.h>
  37 #endif
  38 #ifdef HAVE_SYS_THR_H
  39 #include <sys/ucontext.h>
  40 #include <sys/thr.h>
  41 #endif
  42
  43 #include "wine/library.h"
  44 #include "wine/pthread.h"
  45
  46 #ifdef HAVE_PTHREAD_H
  47
  48 static int init_done;
  49 static int nb_threads = 1;
  50
  51 #ifndef __i386__
  52 static pthread_key_t teb_key;
  53 #endif
  54
  55 /***********************************************************************
  56  *           init_process
  57  *
  58  * Initialization for a newly created process.
  59  */
  60 static void init_process( const struct wine_pthread_callbacks *callbacks, size_t size )
  61 {
  62     init_done = 1;
  63 }
  64
  65
  66 /***********************************************************************
  67  *           init_thread
  68  *
  69  * Initialization for a newly created thread.
  70  */
  71 static void init_thread( struct wine_pthread_thread_info *info )
  72 {
  73     /* retrieve the stack info (except for main thread) */
  74     if (init_done)
  75     {
  76 #ifdef HAVE_PTHREAD_GETATTR_NP
  77         pthread_attr_t attr;
  78         pthread_getattr_np( pthread_self(), &attr );
  79         pthread_attr_getstack( &attr, &info->stack_base, &info->stack_size );
  80         pthread_attr_destroy( &attr );
  81 #elif defined(HAVE_PTHREAD_ATTR_GET_NP)
  82         pthread_attr_t attr;
  83         pthread_attr_init( &attr );
  84         pthread_attr_get_np( pthread_self(), &attr );
  85         pthread_attr_getstack( &attr, &info->stack_base, &info->stack_size );
  86         pthread_attr_destroy( &attr );
  87 #elif defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
  88         char dummy;
  89         info->stack_size = pthread_get_stacksize_np(pthread_self());
  90         info->stack_base = pthread_get_stackaddr_np(pthread_self());
  91         /* if base is too large assume it's the top of the stack instead */
  92         if ((char *)info->stack_base > &dummy)
  93             info->stack_base = (char *)info->stack_base - info->stack_size;
  94 #else
  95         /* assume that the stack allocation is page aligned */
  96         char dummy;
  97         size_t page_size = getpagesize();
  98         char *stack_top = (char *)((unsigned long)&dummy & ~(page_size - 1)) + page_size;
  99         info->stack_base = stack_top - info->stack_size;
 100 #endif
 101     }
 102 }
 103
 104
 105 /***********************************************************************
 106  *           create_thread
 107  */
 108 static int create_thread( struct wine_pthread_thread_info *info )
 109 {
 110     pthread_t id;
 111     pthread_attr_t attr;
 112     int ret = 0;
 113
 114     pthread_attr_init( &attr );
 115     pthread_attr_setstacksize( &attr, info->stack_size );
 116     pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_DETACHED );
 117     pthread_attr_setscope( &attr, PTHREAD_SCOPE_SYSTEM ); /* force creating a kernel thread on Solaris */
 118     interlocked_xchg_add( &nb_threads, 1 );
 119     if (pthread_create( &id, &attr, (void * (*)(void *))info->entry, info ))
 120     {
 121         interlocked_xchg_add( &nb_threads, -1 );
 122         ret = -1;
 123     }
 124     pthread_attr_destroy( &attr );
 125     return ret;
 126 }
 127
 128
 129 /***********************************************************************
 130  *           init_current_teb
 131  *
 132  * Set the current TEB for a new thread.
 133  */
 134 static void init_current_teb( struct wine_pthread_thread_info *info )
 135 {
 136 #ifdef __i386__
 137     /* On the i386, the current thread is in the %fs register */
 138     LDT_ENTRY fs_entry;
 139
 140     wine_ldt_set_base( &fs_entry, info->teb_base );
 141     wine_ldt_set_limit( &fs_entry, info->teb_size - 1 );
 142     wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
 143     wine_ldt_init_fs( info->teb_sel, &fs_entry );
 144 #else
 145     if (!init_done)  /* first thread */
 146         pthread_key_create( &teb_key, NULL );
 147     pthread_setspecific( teb_key, info->teb_base );
 148 #endif
 149
 150     /* set pid and tid */
 151     info->pid = getpid();
 152 #ifdef __sun
 153     info->tid = pthread_self();  /* this should return the lwp id on solaris */
 154 #elif defined(__APPLE__)
 155     info->tid = mach_thread_self();
 156 #elif defined(__FreeBSD__)
 157     {
 158         long lwpid;
 159         thr_self( &lwpid );
 160         info->tid = (int) lwpid;
 161     }
 162 #else
 163     info->tid = gettid();
 164 #endif
 165 }
 166
 167
 168 /***********************************************************************
 169  *           get_current_teb
 170  */
 171 static void *get_current_teb(void)
 172 {
 173 #ifdef __i386__
 174     void *ret;
 175     __asm__( ".byte 0x64\n\tmovl 0x18,%0" : "=r" (ret) );
 176     return ret;
 177 #else
 178     return pthread_getspecific( teb_key );
 179 #endif
 180 }
 181
 182
 183 /***********************************************************************
 184  *           exit_thread
 185  */
 186 static void DECLSPEC_NORETURN exit_thread( struct wine_pthread_thread_info *info )
 187 {
 188     if (interlocked_xchg_add( &nb_threads, -1 ) <= 1) exit( info->exit_status );
 189     wine_ldt_free_fs( info->teb_sel );
 190     if (info->teb_size) munmap( info->teb_base, info->teb_size );
 191     pthread_exit( (void *)info->exit_status );
 192 }
 193
 194
 195 /***********************************************************************
 196  *           abort_thread
 197  */
 198 static void DECLSPEC_NORETURN abort_thread( long status )
 199 {
 200     if (interlocked_xchg_add( &nb_threads, -1 ) <= 1) _exit( status );
 201     pthread_exit( (void *)status );
 202 }
 203
 204 #else  /* HAVE_PTHREAD_H */
 205
 206 static void init_process( const struct wine_pthread_callbacks *callbacks, size_t size )
 207 {
 208 }
 209
 210 static void init_thread( struct wine_pthread_thread_info *info )
 211 {
 212 }
 213
 214 static int create_thread( struct wine_pthread_thread_info *info )
 215 {
 216     return -1;
 217 }
 218
 219 static void init_current_teb( struct wine_pthread_thread_info *info )
 220 {
 221 }
 222
 223 static void *get_current_teb(void)
 224 {
 225     return NULL;
 226 }
 227
 228 static void DECLSPEC_NORETURN exit_thread( struct wine_pthread_thread_info *info )
 229 {
 230     abort();
 231 }
 232
 233 static void DECLSPEC_NORETURN abort_thread( long status )
 234 {
 235     abort();
 236 }
 237
 238 static int pthread_sigmask( int how, const sigset_t *newset, sigset_t *oldset )
 239 {
 240     return -1;
 241 }
 242
 243 #endif  /* HAVE_PTHREAD_H */
 244
 245
 246 /***********************************************************************
 247  *           pthread_functions
 248  */
 249 const struct wine_pthread_functions pthread_functions =
 250 {
 251     init_process,
 252     init_thread,
 253     create_thread,
 254     init_current_teb,
 255     get_current_teb,
 256     exit_thread,
 257     abort_thread,
 258     pthread_sigmask
 259 };