dlls/ntdll/thread.c

   1 /*
   2  * NT threads support
   3  *
   4  * Copyright 1996, 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 <assert.h>
  22 #include <stdarg.h>
  23 #include <limits.h>
  24 #include <sys/types.h>
  25
  26 #define NONAMELESSUNION
  27 #include "ntstatus.h"
  28 #define WIN32_NO_STATUS
  29 #include "winternl.h"
  30 #include "wine/debug.h"
  31 #include "ntdll_misc.h"
  32 #include "ddk/wdm.h"
  33 #include "wine/exception.h"
  34
  35 WINE_DECLARE_DEBUG_CHANNEL(relay);
  36 WINE_DECLARE_DEBUG_CHANNEL(thread);
  37
  38 struct _KUSER_SHARED_DATA *user_shared_data = (void *)0x7ffe0000;
  39
  40
  41 /***********************************************************************
  42  *              __wine_dbg_get_channel_flags  (NTDLL.@)
  43  *
  44  * Get the flags to use for a given channel, possibly setting them too in case of lazy init
  45  */
  46 unsigned char __cdecl __wine_dbg_get_channel_flags( struct __wine_debug_channel *channel )
  47 {
  48     return unix_funcs->dbg_get_channel_flags( channel );
  49 }
  50
  51 /***********************************************************************
  52  *              __wine_dbg_strdup  (NTDLL.@)
  53  */
  54 const char * __cdecl __wine_dbg_strdup( const char *str )
  55 {
  56     return unix_funcs->dbg_strdup( str );
  57 }
  58
  59 /***********************************************************************
  60  *              __wine_dbg_header  (NTDLL.@)
  61  */
  62 int __cdecl __wine_dbg_header( enum __wine_debug_class cls, struct __wine_debug_channel *channel,
  63                                const char *function )
  64 {
  65     return unix_funcs->dbg_header( cls, channel, function );
  66 }
  67
  68 /***********************************************************************
  69  *              __wine_dbg_output  (NTDLL.@)
  70  */
  71 int __cdecl __wine_dbg_output( const char *str )
  72 {
  73     return unix_funcs->dbg_output( str );
  74 }
  75
  76
  77 /***********************************************************************
  78  *           RtlExitUserThread  (NTDLL.@)
  79  */
  80 void WINAPI RtlExitUserThread( ULONG status )
  81 {
  82     ULONG last;
  83
  84     NtQueryInformationThread( GetCurrentThread(), ThreadAmILastThread, &last, sizeof(last), NULL );
  85     if (last) RtlExitUserProcess( status );
  86     LdrShutdownThread();
  87     for (;;) NtTerminateThread( GetCurrentThread(), status );
  88 }
  89
  90
  91 /***********************************************************************
  92  *           RtlUserThreadStart (NTDLL.@)
  93  */
  94 #ifdef __i386__
  95 __ASM_STDCALL_FUNC( RtlUserThreadStart, 8,
  96                    "movl %ebx,8(%esp)\n\t"  /* arg */
  97                    "movl %eax,4(%esp)\n\t"  /* entry */
  98                    "jmp " __ASM_NAME("call_thread_func") )
  99
 100 /* wrapper to call BaseThreadInitThunk */
 101 extern void DECLSPEC_NORETURN call_thread_func_wrapper( void *thunk, PRTL_THREAD_START_ROUTINE entry, void *arg );
 102 __ASM_GLOBAL_FUNC( call_thread_func_wrapper,
 103                   "pushl %ebp\n\t"
 104                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 105                   __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
 106                   "movl %esp,%ebp\n\t"
 107                   __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
 108                    "subl $4,%esp\n\t"
 109                    "andl $~0xf,%esp\n\t"
 110                    "xorl %ecx,%ecx\n\t"
 111                    "movl 12(%ebp),%edx\n\t"
 112                    "movl 16(%ebp),%eax\n\t"
 113                    "movl %eax,(%esp)\n\t"
 114                    "call *8(%ebp)" )
 115
 116 void DECLSPEC_HIDDEN call_thread_func( PRTL_THREAD_START_ROUTINE entry, void *arg )
 117 {
 118     __TRY
 119     {
 120         TRACE_(relay)( "\1Starting thread proc %p (arg=%p)\n", entry, arg );
 121         call_thread_func_wrapper( pBaseThreadInitThunk, entry, arg );
 122     }
 123     __EXCEPT(call_unhandled_exception_filter)
 124     {
 125         NtTerminateProcess( GetCurrentProcess(), GetExceptionCode() );
 126     }
 127     __ENDTRY
 128 }
 129
 130 #else  /* __i386__ */
 131
 132 void WINAPI RtlUserThreadStart( PRTL_THREAD_START_ROUTINE entry, void *arg )
 133 {
 134     __TRY
 135     {
 136         TRACE_(relay)( "\1Starting thread proc %p (arg=%p)\n", entry, arg );
 137         pBaseThreadInitThunk( 0, (LPTHREAD_START_ROUTINE)entry, arg );
 138     }
 139     __EXCEPT(call_unhandled_exception_filter)
 140     {
 141         NtTerminateProcess( GetCurrentProcess(), GetExceptionCode() );
 142     }
 143     __ENDTRY
 144 }
 145
 146 #endif  /* __i386__ */
 147
 148
 149 /***********************************************************************
 150  *              RtlCreateUserThread   (NTDLL.@)
 151  */
 152 NTSTATUS WINAPI RtlCreateUserThread( HANDLE process, SECURITY_DESCRIPTOR *descr,
 153                                      BOOLEAN suspended, PVOID stack_addr,
 154                                      SIZE_T stack_reserve, SIZE_T stack_commit,
 155                                      PRTL_THREAD_START_ROUTINE start, void *param,
 156                                      HANDLE *handle_ptr, CLIENT_ID *id )
 157 {
 158     ULONG flags = suspended ? THREAD_CREATE_FLAGS_CREATE_SUSPENDED : 0;
 159     ULONG_PTR buffer[offsetof( PS_ATTRIBUTE_LIST, Attributes[2] ) / sizeof(ULONG_PTR)];
 160     PS_ATTRIBUTE_LIST *attr_list = (PS_ATTRIBUTE_LIST *)buffer;
 161     HANDLE handle, actctx;
 162     TEB *teb;
 163     ULONG ret;
 164     NTSTATUS status;
 165     CLIENT_ID client_id;
 166     OBJECT_ATTRIBUTES attr;
 167
 168     attr_list->TotalLength = sizeof(buffer);
 169     attr_list->Attributes[0].Attribute    = PS_ATTRIBUTE_CLIENT_ID;
 170     attr_list->Attributes[0].Size         = sizeof(client_id);
 171     attr_list->Attributes[0].ValuePtr     = &client_id;
 172     attr_list->Attributes[0].ReturnLength = NULL;
 173     attr_list->Attributes[1].Attribute    = PS_ATTRIBUTE_TEB_ADDRESS;
 174     attr_list->Attributes[1].Size         = sizeof(teb);
 175     attr_list->Attributes[1].ValuePtr     = &teb;
 176     attr_list->Attributes[1].ReturnLength = NULL;
 177
 178     InitializeObjectAttributes( &attr, NULL, 0, NULL, descr );
 179
 180     RtlGetActiveActivationContext( &actctx );
 181     if (actctx) flags |= THREAD_CREATE_FLAGS_CREATE_SUSPENDED;
 182
 183     status = NtCreateThreadEx( &handle, THREAD_ALL_ACCESS, &attr, process, start, param,
 184                                flags, 0, stack_commit, stack_reserve, attr_list );
 185     if (!status)
 186     {
 187         if (actctx)
 188         {
 189             ULONG_PTR cookie;
 190             RtlActivateActivationContextEx( 0, teb, actctx, &cookie );
 191             if (!suspended) NtResumeThread( handle, &ret );
 192         }
 193         if (id) *id = client_id;
 194         if (handle_ptr) *handle_ptr = handle;
 195         else NtClose( handle );
 196     }
 197     if (actctx) RtlReleaseActivationContext( actctx );
 198     return status;
 199 }
 200
 201
 202 /******************************************************************************
 203  *              RtlGetNtGlobalFlags   (NTDLL.@)
 204  */
 205 ULONG WINAPI RtlGetNtGlobalFlags(void)
 206 {
 207     return NtCurrentTeb()->Peb->NtGlobalFlag;
 208 }
 209
 210
 211 /******************************************************************************
 212  *              RtlPushFrame  (NTDLL.@)
 213  */
 214 void WINAPI RtlPushFrame( TEB_ACTIVE_FRAME *frame )
 215 {
 216     frame->Previous = NtCurrentTeb()->ActiveFrame;
 217     NtCurrentTeb()->ActiveFrame = frame;
 218 }
 219
 220
 221 /******************************************************************************
 222  *              RtlPopFrame  (NTDLL.@)
 223  */
 224 void WINAPI RtlPopFrame( TEB_ACTIVE_FRAME *frame )
 225 {
 226     NtCurrentTeb()->ActiveFrame = frame->Previous;
 227 }
 228
 229
 230 /******************************************************************************
 231  *              RtlGetFrame  (NTDLL.@)
 232  */
 233 TEB_ACTIVE_FRAME * WINAPI RtlGetFrame(void)
 234 {
 235     return NtCurrentTeb()->ActiveFrame;
 236 }
 237
 238
 239 /***********************************************************************
 240  * Fibers
 241  ***********************************************************************/
 242
 243
 244 static GLOBAL_FLS_DATA fls_data = { { NULL }, { &fls_data.fls_list_head, &fls_data.fls_list_head } };
 245
 246 static RTL_CRITICAL_SECTION fls_section;
 247 static RTL_CRITICAL_SECTION_DEBUG fls_critsect_debug =
 248 {
 249     0, 0, &fls_section,
 250     { &fls_critsect_debug.ProcessLocksList, &fls_critsect_debug.ProcessLocksList },
 251             0, 0, { (DWORD_PTR)(__FILE__ ": fls_section") }
 252 };
 253 static RTL_CRITICAL_SECTION fls_section = { &fls_critsect_debug, -1, 0, 0, 0, 0 };
 254
 255 #define MAX_FLS_DATA_COUNT 0xff0
 256
 257 static void lock_fls_data(void)
 258 {
 259     RtlEnterCriticalSection( &fls_section );
 260 }
 261
 262 static void unlock_fls_data(void)
 263 {
 264     RtlLeaveCriticalSection( &fls_section );
 265 }
 266
 267 static unsigned int fls_chunk_size( unsigned int chunk_index )
 268 {
 269     return 0x10 << chunk_index;
 270 }
 271
 272 static unsigned int fls_index_from_chunk_index( unsigned int chunk_index, unsigned int index )
 273 {
 274     return 0x10 * ((1 << chunk_index) - 1) + index;
 275 }
 276
 277 static unsigned int fls_chunk_index_from_index( unsigned int index, unsigned int *index_in_chunk )
 278 {
 279     unsigned int chunk_index = 0;
 280
 281     while (index >= fls_chunk_size( chunk_index ))
 282         index -= fls_chunk_size( chunk_index++ );
 283
 284     *index_in_chunk = index;
 285     return chunk_index;
 286 }
 287
 288 TEB_FLS_DATA *fls_alloc_data(void)
 289 {
 290     TEB_FLS_DATA *fls;
 291
 292     if (!(fls = RtlAllocateHeap( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*fls) )))
 293         return NULL;
 294
 295     lock_fls_data();
 296     InsertTailList( &fls_data.fls_list_head, &fls->fls_list_entry );
 297     unlock_fls_data();
 298
 299     return fls;
 300 }
 301
 302
 303 /***********************************************************************
 304  *              RtlFlsAlloc  (NTDLL.@)
 305  */
 306 NTSTATUS WINAPI DECLSPEC_HOTPATCH RtlFlsAlloc( PFLS_CALLBACK_FUNCTION callback, ULONG *ret_index )
 307 {
 308     unsigned int chunk_index, index, i;
 309     FLS_INFO_CHUNK *chunk;
 310     TEB_FLS_DATA *fls;
 311
 312     if (!(fls = NtCurrentTeb()->FlsSlots)
 313             && !(NtCurrentTeb()->FlsSlots = fls = fls_alloc_data()))
 314         return STATUS_NO_MEMORY;
 315
 316     lock_fls_data();
 317     for (i = 0; i < ARRAY_SIZE(fls_data.fls_callback_chunks); ++i)
 318     {
 319         if (!fls_data.fls_callback_chunks[i] || fls_data.fls_callback_chunks[i]->count < fls_chunk_size( i ))
 320             break;
 321     }
 322
 323     if ((chunk_index = i) == ARRAY_SIZE(fls_data.fls_callback_chunks))
 324     {
 325         unlock_fls_data();
 326         return STATUS_NO_MEMORY;
 327     }
 328
 329     if ((chunk = fls_data.fls_callback_chunks[chunk_index]))
 330     {
 331         for (index = 0; index < fls_chunk_size( chunk_index ); ++index)
 332             if (!chunk->callbacks[index].callback)
 333                 break;
 334         assert( index < fls_chunk_size( chunk_index ));
 335     }
 336     else
 337     {
 338         fls_data.fls_callback_chunks[chunk_index] = chunk = RtlAllocateHeap( GetProcessHeap(), HEAP_ZERO_MEMORY,
 339                 offsetof(FLS_INFO_CHUNK, callbacks) + sizeof(*chunk->callbacks) * fls_chunk_size( chunk_index ));
 340         if (!chunk)
 341         {
 342             unlock_fls_data();
 343             return STATUS_NO_MEMORY;
 344         }
 345
 346         if (chunk_index)
 347         {
 348             index = 0;
 349         }
 350         else
 351         {
 352             chunk->count = 1; /* FLS index 0 is prohibited. */
 353             chunk->callbacks[0].callback = (void *)~(ULONG_PTR)0;
 354             index = 1;
 355         }
 356     }
 357
 358     ++chunk->count;
 359     chunk->callbacks[index].callback = callback ? callback : (PFLS_CALLBACK_FUNCTION)~(ULONG_PTR)0;
 360
 361     if ((*ret_index = fls_index_from_chunk_index( chunk_index, index )) > fls_data.fls_high_index)
 362         fls_data.fls_high_index = *ret_index;
 363
 364     unlock_fls_data();
 365
 366     return STATUS_SUCCESS;
 367 }
 368
 369
 370 /***********************************************************************
 371  *              RtlFlsFree   (NTDLL.@)
 372  */
 373 NTSTATUS WINAPI DECLSPEC_HOTPATCH RtlFlsFree( ULONG index )
 374 {
 375     PFLS_CALLBACK_FUNCTION callback;
 376     unsigned int chunk_index, idx;
 377     FLS_INFO_CHUNK *chunk;
 378     LIST_ENTRY *entry;
 379
 380     lock_fls_data();
 381
 382     if (!index || index > fls_data.fls_high_index)
 383     {
 384         unlock_fls_data();
 385         return STATUS_INVALID_PARAMETER;
 386     }
 387
 388     chunk_index = fls_chunk_index_from_index( index, &idx );
 389     if (!(chunk = fls_data.fls_callback_chunks[chunk_index])
 390             || !(callback = chunk->callbacks[idx].callback))
 391     {
 392         unlock_fls_data();
 393         return STATUS_INVALID_PARAMETER;
 394     }
 395
 396     for (entry = fls_data.fls_list_head.Flink; entry != &fls_data.fls_list_head; entry = entry->Flink)
 397     {
 398         TEB_FLS_DATA *fls = CONTAINING_RECORD(entry, TEB_FLS_DATA, fls_list_entry);
 399
 400         if (fls->fls_data_chunks[chunk_index] && fls->fls_data_chunks[chunk_index][idx + 1])
 401         {
 402             if (callback != (void *)~(ULONG_PTR)0)
 403             {
 404                 TRACE_(relay)("Calling FLS callback %p, arg %p.\n", callback,
 405                         fls->fls_data_chunks[chunk_index][idx + 1]);
 406
 407                 callback( fls->fls_data_chunks[chunk_index][idx + 1] );
 408             }
 409             fls->fls_data_chunks[chunk_index][idx + 1] = NULL;
 410         }
 411     }
 412
 413     --chunk->count;
 414     chunk->callbacks[idx].callback = NULL;
 415
 416     unlock_fls_data();
 417     return STATUS_SUCCESS;
 418 }
 419
 420
 421 /***********************************************************************
 422  *              RtlFlsSetValue (NTDLL.@)
 423  */
 424 NTSTATUS WINAPI DECLSPEC_HOTPATCH RtlFlsSetValue( ULONG index, void *data )
 425 {
 426     unsigned int chunk_index, idx;
 427     TEB_FLS_DATA *fls;
 428
 429     if (!index || index >= MAX_FLS_DATA_COUNT)
 430         return STATUS_INVALID_PARAMETER;
 431
 432     if (!(fls = NtCurrentTeb()->FlsSlots)
 433             && !(NtCurrentTeb()->FlsSlots = fls = fls_alloc_data()))
 434         return STATUS_NO_MEMORY;
 435
 436     chunk_index = fls_chunk_index_from_index( index, &idx );
 437
 438     if (!fls->fls_data_chunks[chunk_index] &&
 439             !(fls->fls_data_chunks[chunk_index] = RtlAllocateHeap( GetProcessHeap(), HEAP_ZERO_MEMORY,
 440             (fls_chunk_size( chunk_index ) + 1) * sizeof(*fls->fls_data_chunks[chunk_index]) )))
 441         return STATUS_NO_MEMORY;
 442
 443     fls->fls_data_chunks[chunk_index][idx + 1] = data;
 444
 445     return STATUS_SUCCESS;
 446 }
 447
 448
 449 /***********************************************************************
 450  *              RtlFlsGetValue (NTDLL.@)
 451  */
 452 NTSTATUS WINAPI DECLSPEC_HOTPATCH RtlFlsGetValue( ULONG index, void **data )
 453 {
 454     unsigned int chunk_index, idx;
 455     TEB_FLS_DATA *fls;
 456
 457     if (!index || index >= MAX_FLS_DATA_COUNT || !(fls = NtCurrentTeb()->FlsSlots))
 458         return STATUS_INVALID_PARAMETER;
 459
 460     chunk_index = fls_chunk_index_from_index( index, &idx );
 461
 462     *data = fls->fls_data_chunks[chunk_index] ? fls->fls_data_chunks[chunk_index][idx + 1] : NULL;
 463     return STATUS_SUCCESS;
 464 }
 465
 466
 467 /***********************************************************************
 468  *              RtlProcessFlsData (NTDLL.@)
 469  */
 470 void WINAPI DECLSPEC_HOTPATCH RtlProcessFlsData( void *teb_fls_data, ULONG flags )
 471 {
 472     TEB_FLS_DATA *fls = teb_fls_data;
 473     unsigned int i, index;
 474
 475     TRACE_(thread)( "teb_fls_data %p, flags %#x.\n", teb_fls_data, flags );
 476
 477     if (flags & ~3)
 478         FIXME_(thread)( "Unknown flags %#x.\n", flags );
 479
 480     if (!fls)
 481         return;
 482
 483     if (flags & 1)
 484     {
 485         lock_fls_data();
 486         for (i = 0; i < ARRAY_SIZE(fls->fls_data_chunks); ++i)
 487         {
 488             if (!fls->fls_data_chunks[i] || !fls_data.fls_callback_chunks[i]
 489                     || !fls_data.fls_callback_chunks[i]->count)
 490                 continue;
 491
 492             for (index = 0; index < fls_chunk_size( i ); ++index)
 493             {
 494                 PFLS_CALLBACK_FUNCTION callback = fls_data.fls_callback_chunks[i]->callbacks[index].callback;
 495
 496                 if (!fls->fls_data_chunks[i][index + 1])
 497                     continue;
 498
 499                 if (callback && callback != (void *)~(ULONG_PTR)0)
 500                 {
 501                     TRACE_(relay)("Calling FLS callback %p, arg %p.\n", callback,
 502                             fls->fls_data_chunks[i][index + 1]);
 503
 504                     callback( fls->fls_data_chunks[i][index + 1] );
 505                 }
 506                 fls->fls_data_chunks[i][index + 1] = NULL;
 507             }
 508         }
 509         /* Not using RemoveEntryList() as Windows does not zero list entry here. */
 510         fls->fls_list_entry.Flink->Blink = fls->fls_list_entry.Blink;
 511         fls->fls_list_entry.Blink->Flink = fls->fls_list_entry.Flink;
 512         unlock_fls_data();
 513     }
 514
 515     if (flags & 2)
 516     {
 517         for (i = 0; i < ARRAY_SIZE(fls->fls_data_chunks); ++i)
 518             RtlFreeHeap( GetProcessHeap(), 0, fls->fls_data_chunks[i] );
 519
 520         RtlFreeHeap( GetProcessHeap(), 0, fls );
 521     }
 522 }