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wine-wine/dlls/ntdll/unix/thread.c

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/*
* NT threads support
*
* Copyright 1996, 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
*/
#if 0
#pragma makedep unix
#endif
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <pthread.h>
#include <signal.h>
#include <sys/types.h>
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#ifdef HAVE_SYS_TIMES_H
#include <sys/times.h>
#endif
#ifdef HAVE_SYS_SYSCALL_H
#include <sys/syscall.h>
#endif
#define NONAMELESSUNION
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "winternl.h"
#include "ddk/wdm.h"
#include "wine/server.h"
#include "wine/debug.h"
#include "wine/exception.h"
#include "unix_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(seh);
#ifndef PTHREAD_STACK_MIN
#define PTHREAD_STACK_MIN 16384
#endif
static int *nb_threads;
static inline int get_unix_exit_code( NTSTATUS status )
{
/* prevent a nonzero exit code to end up truncated to zero in unix */
if (status && !(status & 0xff)) return 1;
return status;
}
/***********************************************************************
* pthread_exit_wrapper
*/
static void pthread_exit_wrapper( int status )
{
close( ntdll_get_thread_data()->wait_fd[0] );
close( ntdll_get_thread_data()->wait_fd[1] );
close( ntdll_get_thread_data()->reply_fd );
close( ntdll_get_thread_data()->request_fd );
pthread_exit( UIntToPtr(status) );
}
/***********************************************************************
* init_threading
*/
TEB * CDECL init_threading( int *nb_threads_ptr, struct ldt_copy **ldt_copy, SIZE_T *size, BOOL *suspend,
unsigned int *cpus, BOOL *wow64, timeout_t *start_time )
{
TEB *teb;
SIZE_T info_size;
struct ntdll_thread_data *thread_data;
#ifdef __i386__
extern struct ldt_copy __wine_ldt_copy;
*ldt_copy = &__wine_ldt_copy;
#endif
nb_threads = nb_threads_ptr;
teb = virtual_alloc_first_teb();
thread_data = (struct ntdll_thread_data *)&teb->GdiTebBatch;
thread_data->request_fd = -1;
thread_data->reply_fd = -1;
thread_data->wait_fd[0] = -1;
thread_data->wait_fd[1] = -1;
signal_init_threading();
signal_alloc_thread( teb );
signal_init_thread( teb );
dbg_init();
server_init_process();
info_size = server_init_thread( teb->Peb, suspend );
virtual_map_user_shared_data();
NtCreateKeyedEvent( &keyed_event, GENERIC_READ | GENERIC_WRITE, NULL, 0 );
if (size) *size = info_size;
if (cpus) *cpus = server_cpus;
if (wow64) *wow64 = is_wow64;
if (start_time) *start_time = server_start_time;
return teb;
}
/* info passed to a starting thread */
struct startup_info
{
PRTL_THREAD_START_ROUTINE entry;
void *arg;
HANDLE actctx;
};
/***********************************************************************
* start_thread
*
* Startup routine for a newly created thread.
*/
static void start_thread( TEB *teb )
{
struct startup_info *info = (struct startup_info *)(teb + 1);
struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)&teb->GdiTebBatch;
struct debug_info debug_info;
BOOL suspend;
ULONG_PTR cookie;
debug_info.str_pos = debug_info.out_pos = 0;
thread_data->debug_info = &debug_info;
thread_data->pthread_id = pthread_self();
signal_init_thread( teb );
server_init_thread( info->entry, &suspend );
if (info->actctx)
{
RtlActivateActivationContext( 0, info->actctx, &cookie );
RtlReleaseActivationContext( info->actctx );
}
signal_start_thread( info->entry, info->arg, suspend, RtlUserThreadStart, teb );
}
/***********************************************************************
* update_attr_list
*
* Update the output attributes.
*/
static void update_attr_list( PS_ATTRIBUTE_LIST *attr, const CLIENT_ID *id )
{
SIZE_T i, count = (attr->TotalLength - sizeof(attr->TotalLength)) / sizeof(PS_ATTRIBUTE);
for (i = 0; i < count; i++)
{
if (attr->Attributes[i].Attribute == PS_ATTRIBUTE_CLIENT_ID)
{
SIZE_T size = min( attr->Attributes[i].Size, sizeof(*id) );
memcpy( attr->Attributes[i].ValuePtr, id, size );
if (attr->Attributes[i].ReturnLength) *attr->Attributes[i].ReturnLength = size;
}
}
}
/***********************************************************************
* NtCreateThreadEx (NTDLL.@)
*/
NTSTATUS WINAPI NtCreateThreadEx( HANDLE *handle, ACCESS_MASK access, OBJECT_ATTRIBUTES *attr,
HANDLE process, PRTL_THREAD_START_ROUTINE start, void *param,
ULONG flags, SIZE_T zero_bits, SIZE_T stack_commit,
SIZE_T stack_reserve, PS_ATTRIBUTE_LIST *attr_list )
{
sigset_t sigset;
pthread_t pthread_id;
pthread_attr_t pthread_attr;
data_size_t len;
struct object_attributes *objattr;
struct ntdll_thread_data *thread_data;
struct startup_info *info;
DWORD tid = 0;
int request_pipe[2];
SIZE_T extra_stack = PTHREAD_STACK_MIN;
CLIENT_ID client_id;
HANDLE actctx;
TEB *teb;
INITIAL_TEB stack;
NTSTATUS status;
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
memset( &call, 0, sizeof(call) );
call.create_thread.type = APC_CREATE_THREAD;
call.create_thread.flags = flags;
call.create_thread.func = wine_server_client_ptr( start );
call.create_thread.arg = wine_server_client_ptr( param );
call.create_thread.reserve = stack_reserve;
call.create_thread.commit = stack_commit;
status = server_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.create_thread.status == STATUS_SUCCESS)
{
*handle = wine_server_ptr_handle( result.create_thread.handle );
client_id.UniqueProcess = ULongToHandle( result.create_thread.pid );
client_id.UniqueThread = ULongToHandle( result.create_thread.tid );
if (attr_list) update_attr_list( attr_list, &client_id );
}
return result.create_thread.status;
}
if ((status = alloc_object_attributes( attr, &objattr, &len ))) return status;
if (server_pipe( request_pipe ) == -1)
{
RtlFreeHeap( GetProcessHeap(), 0, objattr );
return STATUS_TOO_MANY_OPENED_FILES;
}
server_send_fd( request_pipe[0] );
if (!access) access = THREAD_ALL_ACCESS;
SERVER_START_REQ( new_thread )
{
req->process = wine_server_obj_handle( process );
req->access = access;
req->suspend = flags & THREAD_CREATE_FLAGS_CREATE_SUSPENDED;
req->request_fd = request_pipe[0];
wine_server_add_data( req, objattr, len );
if (!(status = wine_server_call( req )))
{
*handle = wine_server_ptr_handle( reply->handle );
tid = reply->tid;
}
close( request_pipe[0] );
}
SERVER_END_REQ;
RtlFreeHeap( GetProcessHeap(), 0, objattr );
if (status)
{
close( request_pipe[1] );
return status;
}
RtlGetActiveActivationContext( &actctx );
pthread_sigmask( SIG_BLOCK, &server_block_set, &sigset );
if ((status = virtual_alloc_teb( &teb ))) goto done;
if ((status = virtual_alloc_thread_stack( &stack, stack_reserve, stack_commit, &extra_stack )))
{
virtual_free_teb( teb );
goto done;
}
client_id.UniqueProcess = ULongToHandle( GetCurrentProcessId() );
client_id.UniqueThread = ULongToHandle( tid );
teb->ClientId = client_id;
info = (struct startup_info *)(teb + 1);
info->entry = start;
info->arg = param;
info->actctx = actctx;
teb->Tib.StackBase = stack.StackBase;
teb->Tib.StackLimit = stack.StackLimit;
teb->DeallocationStack = stack.DeallocationStack;
thread_data = (struct ntdll_thread_data *)&teb->GdiTebBatch;
thread_data->request_fd = request_pipe[1];
thread_data->reply_fd = -1;
thread_data->wait_fd[0] = -1;
thread_data->wait_fd[1] = -1;
thread_data->start_stack = (char *)teb->Tib.StackBase;
pthread_attr_init( &pthread_attr );
pthread_attr_setstack( &pthread_attr, teb->DeallocationStack,
(char *)teb->Tib.StackBase + extra_stack - (char *)teb->DeallocationStack );
pthread_attr_setguardsize( &pthread_attr, 0 );
pthread_attr_setscope( &pthread_attr, PTHREAD_SCOPE_SYSTEM ); /* force creating a kernel thread */
InterlockedIncrement( nb_threads );
if (pthread_create( &pthread_id, &pthread_attr, (void * (*)(void *))start_thread, teb ))
{
InterlockedDecrement( nb_threads );
virtual_free_teb( teb );
status = STATUS_NO_MEMORY;
}
pthread_attr_destroy( &pthread_attr );
done:
pthread_sigmask( SIG_SETMASK, &sigset, NULL );
if (status)
{
NtClose( *handle );
RtlReleaseActivationContext( actctx );
close( request_pipe[1] );
return status;
}
if (attr_list) update_attr_list( attr_list, &client_id );
return STATUS_SUCCESS;
}
/***********************************************************************
* abort_thread
*/
void CDECL abort_thread( int status )
{
pthread_sigmask( SIG_BLOCK, &server_block_set, NULL );
if (InterlockedDecrement( nb_threads ) <= 0) _exit( get_unix_exit_code( status ));
signal_exit_thread( status, pthread_exit_wrapper );
}
/***********************************************************************
* exit_thread
*/
void CDECL exit_thread( int status )
{
static void *prev_teb;
TEB *teb;
pthread_sigmask( SIG_BLOCK, &server_block_set, NULL );
if ((teb = InterlockedExchangePointer( &prev_teb, NtCurrentTeb() )))
{
struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)&teb->GdiTebBatch;
if (thread_data->pthread_id)
{
pthread_join( thread_data->pthread_id, NULL );
virtual_free_teb( teb );
}
}
signal_exit_thread( status, pthread_exit_wrapper );
}
/***********************************************************************
* exit_process
*/
void CDECL exit_process( int status )
{
pthread_sigmask( SIG_BLOCK, &server_block_set, NULL );
signal_exit_thread( get_unix_exit_code( status ), exit );
}
/**********************************************************************
* wait_suspend
*
* Wait until the thread is no longer suspended.
*/
void wait_suspend( CONTEXT *context )
{
int saved_errno = errno;
/* wait with 0 timeout, will only return once the thread is no longer suspended */
server_select( NULL, 0, SELECT_INTERRUPTIBLE, 0, context, NULL, NULL );
errno = saved_errno;
}
/**********************************************************************
* send_debug_event
*
* Send an EXCEPTION_DEBUG_EVENT event to the debugger.
*/
NTSTATUS send_debug_event( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
{
NTSTATUS ret;
DWORD i;
obj_handle_t handle = 0;
client_ptr_t params[EXCEPTION_MAXIMUM_PARAMETERS];
CONTEXT exception_context = *context;
select_op_t select_op;
sigset_t old_set;
if (!NtCurrentTeb()->Peb->BeingDebugged) return 0; /* no debugger present */
pthread_sigmask( SIG_BLOCK, &server_block_set, &old_set );
for (i = 0; i < min( rec->NumberParameters, EXCEPTION_MAXIMUM_PARAMETERS ); i++)
params[i] = rec->ExceptionInformation[i];
SERVER_START_REQ( queue_exception_event )
{
req->first = first_chance;
req->code = rec->ExceptionCode;
req->flags = rec->ExceptionFlags;
req->record = wine_server_client_ptr( rec->ExceptionRecord );
req->address = wine_server_client_ptr( rec->ExceptionAddress );
req->len = i * sizeof(params[0]);
wine_server_add_data( req, params, req->len );
if (!(ret = wine_server_call( req ))) handle = reply->handle;
}
SERVER_END_REQ;
if (handle)
{
select_op.wait.op = SELECT_WAIT;
select_op.wait.handles[0] = handle;
server_select( &select_op, offsetof( select_op_t, wait.handles[1] ), SELECT_INTERRUPTIBLE,
TIMEOUT_INFINITE, &exception_context, NULL, NULL );
SERVER_START_REQ( get_exception_status )
{
req->handle = handle;
ret = wine_server_call( req );
}
SERVER_END_REQ;
if (ret >= 0) *context = exception_context;
}
pthread_sigmask( SIG_SETMASK, &old_set, NULL );
return ret;
}
/*******************************************************************
* NtRaiseException (NTDLL.@)
*/
NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
{
NTSTATUS status = send_debug_event( rec, context, first_chance );
if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
NtSetContextThread( GetCurrentThread(), context );
if (first_chance) KiUserExceptionDispatcher( rec, context );
if (rec->ExceptionFlags & EH_STACK_INVALID)
ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
ERR("Process attempted to continue execution after noncontinuable exception.\n");
else
ERR("Unhandled exception code %x flags %x addr %p\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
return STATUS_SUCCESS;
}
/***********************************************************************
* NtContinue (NTDLL.@)
*/
NTSTATUS WINAPI NtContinue( CONTEXT *context, BOOLEAN alertable )
{
static const LARGE_INTEGER zero_timeout;
if (alertable) server_wait( NULL, 0, SELECT_INTERRUPTIBLE | SELECT_ALERTABLE, &zero_timeout );
return NtSetContextThread( GetCurrentThread(), context );
}
/***********************************************************************
* set_thread_context
*/
NTSTATUS set_thread_context( HANDLE handle, const context_t *context, BOOL *self )
{
NTSTATUS ret;
SERVER_START_REQ( set_thread_context )
{
req->handle = wine_server_obj_handle( handle );
wine_server_add_data( req, context, sizeof(*context) );
ret = wine_server_call( req );
*self = reply->self;
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* get_thread_context
*/
NTSTATUS get_thread_context( HANDLE handle, context_t *context, unsigned int flags, BOOL *self )
{
NTSTATUS ret;
SERVER_START_REQ( get_thread_context )
{
req->handle = wine_server_obj_handle( handle );
req->flags = flags;
wine_server_set_reply( req, context, sizeof(*context) );
ret = wine_server_call( req );
*self = reply->self;
handle = wine_server_ptr_handle( reply->handle );
}
SERVER_END_REQ;
if (ret == STATUS_PENDING)
{
LARGE_INTEGER timeout;
timeout.QuadPart = -1000000;
if (NtWaitForSingleObject( handle, FALSE, &timeout ))
{
NtClose( handle );
return STATUS_ACCESS_DENIED;
}
SERVER_START_REQ( get_thread_context )
{
req->handle = wine_server_obj_handle( handle );
req->flags = flags;
wine_server_set_reply( req, context, sizeof(*context) );
ret = wine_server_call( req );
}
SERVER_END_REQ;
}
return ret;
}
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