/* * Wine server communication * * Copyright (C) 1998 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 #include #include #include #ifdef HAVE_LWP_H #include #endif #ifdef HAVE_PTHREAD_NP_H # include #endif #ifdef HAVE_PWD_H # include #endif #include #include #include #include #include #ifdef HAVE_SYS_SOCKET_H # include #endif #ifdef HAVE_SYS_WAIT_H #include #endif #ifdef HAVE_SYS_UN_H #include #endif #ifdef HAVE_SYS_MMAN_H #include #endif #ifdef HAVE_SYS_PRCTL_H # include #endif #ifdef HAVE_SYS_STAT_H # include #endif #ifdef HAVE_SYS_SYSCALL_H # include #endif #ifdef HAVE_SYS_UIO_H #include #endif #ifdef HAVE_SYS_THR_H #include #endif #ifdef HAVE_UNISTD_H # include #endif #ifdef __APPLE__ #include #include #ifndef _POSIX_SPAWN_DISABLE_ASLR #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 #endif #endif #include "ntstatus.h" #define WIN32_NO_STATUS #include "windef.h" #include "winnt.h" #include "wine/library.h" #include "wine/server.h" #include "wine/debug.h" #include "unix_private.h" #include "ddk/wdm.h" WINE_DEFAULT_DEBUG_CHANNEL(server); #ifndef MSG_CMSG_CLOEXEC #define MSG_CMSG_CLOEXEC 0 #endif #define SOCKETNAME "socket" /* name of the socket file */ #define LOCKNAME "lock" /* name of the lock file */ #ifdef __i386__ static const enum cpu_type client_cpu = CPU_x86; #elif defined(__x86_64__) static const enum cpu_type client_cpu = CPU_x86_64; #elif defined(__powerpc__) static const enum cpu_type client_cpu = CPU_POWERPC; #elif defined(__arm__) static const enum cpu_type client_cpu = CPU_ARM; #elif defined(__aarch64__) static const enum cpu_type client_cpu = CPU_ARM64; #else #error Unsupported CPU #endif static const BOOL is_win64 = (sizeof(void *) > sizeof(int)); static const char *server_dir; unsigned int server_cpus = 0; BOOL is_wow64 = FALSE; timeout_t server_start_time = 0; /* time of server startup */ sigset_t server_block_set; /* signals to block during server calls */ static int fd_socket = -1; /* socket to exchange file descriptors with the server */ static pid_t server_pid; static RTL_CRITICAL_SECTION fd_cache_section; static RTL_CRITICAL_SECTION_DEBUG critsect_debug = { 0, 0, &fd_cache_section, { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList }, 0, 0, { (DWORD_PTR)(__FILE__ ": fd_cache_section") } }; static RTL_CRITICAL_SECTION fd_cache_section = { &critsect_debug, -1, 0, 0, 0, 0 }; /* atomically exchange a 64-bit value */ static inline LONG64 interlocked_xchg64( LONG64 *dest, LONG64 val ) { #ifdef _WIN64 return (LONG64)InterlockedExchangePointer( (void **)dest, (void *)val ); #else LONG64 tmp = *dest; while (InterlockedCompareExchange64( dest, val, tmp ) != tmp) tmp = *dest; return tmp; #endif } #ifdef __GNUC__ static void fatal_error( const char *err, ... ) __attribute__((noreturn, format(printf,1,2))); static void fatal_perror( const char *err, ... ) __attribute__((noreturn, format(printf,1,2))); static void server_connect_error( const char *serverdir ) __attribute__((noreturn)); #endif /* die on a fatal error; use only during initialization */ static void fatal_error( const char *err, ... ) { va_list args; va_start( args, err ); fprintf( stderr, "wine: " ); vfprintf( stderr, err, args ); va_end( args ); exit(1); } /* die on a fatal error; use only during initialization */ static void fatal_perror( const char *err, ... ) { va_list args; va_start( args, err ); fprintf( stderr, "wine: " ); vfprintf( stderr, err, args ); perror( " " ); va_end( args ); exit(1); } /*********************************************************************** * server_protocol_error */ static DECLSPEC_NORETURN void server_protocol_error( const char *err, ... ) { va_list args; va_start( args, err ); fprintf( stderr, "wine client error:%x: ", GetCurrentThreadId() ); vfprintf( stderr, err, args ); va_end( args ); abort_thread(1); } /*********************************************************************** * server_protocol_perror */ static DECLSPEC_NORETURN void server_protocol_perror( const char *err ) { fprintf( stderr, "wine client error:%x: ", GetCurrentThreadId() ); perror( err ); abort_thread(1); } /*********************************************************************** * send_request * * Send a request to the server. */ static unsigned int send_request( const struct __server_request_info *req ) { unsigned int i; int ret; if (!req->u.req.request_header.request_size) { if ((ret = write( ntdll_get_thread_data()->request_fd, &req->u.req, sizeof(req->u.req) )) == sizeof(req->u.req)) return STATUS_SUCCESS; } else { struct iovec vec[__SERVER_MAX_DATA+1]; vec[0].iov_base = (void *)&req->u.req; vec[0].iov_len = sizeof(req->u.req); for (i = 0; i < req->data_count; i++) { vec[i+1].iov_base = (void *)req->data[i].ptr; vec[i+1].iov_len = req->data[i].size; } if ((ret = writev( ntdll_get_thread_data()->request_fd, vec, i+1 )) == req->u.req.request_header.request_size + sizeof(req->u.req)) return STATUS_SUCCESS; } if (ret >= 0) server_protocol_error( "partial write %d\n", ret ); if (errno == EPIPE) abort_thread(0); if (errno == EFAULT) return STATUS_ACCESS_VIOLATION; server_protocol_perror( "write" ); } /*********************************************************************** * read_reply_data * * Read data from the reply buffer; helper for wait_reply. */ static void read_reply_data( void *buffer, size_t size ) { int ret; for (;;) { if ((ret = read( ntdll_get_thread_data()->reply_fd, buffer, size )) > 0) { if (!(size -= ret)) return; buffer = (char *)buffer + ret; continue; } if (!ret) break; if (errno == EINTR) continue; if (errno == EPIPE) break; server_protocol_perror("read"); } /* the server closed the connection; time to die... */ abort_thread(0); } /*********************************************************************** * wait_reply * * Wait for a reply from the server. */ static inline unsigned int wait_reply( struct __server_request_info *req ) { read_reply_data( &req->u.reply, sizeof(req->u.reply) ); if (req->u.reply.reply_header.reply_size) read_reply_data( req->reply_data, req->u.reply.reply_header.reply_size ); return req->u.reply.reply_header.error; } /*********************************************************************** * server_call_unlocked */ unsigned int CDECL server_call_unlocked( void *req_ptr ) { struct __server_request_info * const req = req_ptr; unsigned int ret; if ((ret = send_request( req ))) return ret; return wait_reply( req ); } /*********************************************************************** * wine_server_call * * Perform a server call. */ unsigned int CDECL wine_server_call( void *req_ptr ) { sigset_t old_set; unsigned int ret; pthread_sigmask( SIG_BLOCK, &server_block_set, &old_set ); ret = server_call_unlocked( req_ptr ); pthread_sigmask( SIG_SETMASK, &old_set, NULL ); return ret; } /*********************************************************************** * server_enter_uninterrupted_section */ void server_enter_uninterrupted_section( RTL_CRITICAL_SECTION *cs, sigset_t *sigset ) { pthread_sigmask( SIG_BLOCK, &server_block_set, sigset ); RtlEnterCriticalSection( cs ); } /*********************************************************************** * server_leave_uninterrupted_section */ void server_leave_uninterrupted_section( RTL_CRITICAL_SECTION *cs, sigset_t *sigset ) { RtlLeaveCriticalSection( cs ); pthread_sigmask( SIG_SETMASK, sigset, NULL ); } /*********************************************************************** * wait_select_reply * * Wait for a reply on the waiting pipe of the current thread. */ static int wait_select_reply( void *cookie ) { int signaled; struct wake_up_reply reply; for (;;) { int ret; ret = read( ntdll_get_thread_data()->wait_fd[0], &reply, sizeof(reply) ); if (ret == sizeof(reply)) { if (!reply.cookie) abort_thread( reply.signaled ); /* thread got killed */ if (wine_server_get_ptr(reply.cookie) == cookie) return reply.signaled; /* we stole another reply, wait for the real one */ signaled = wait_select_reply( cookie ); /* and now put the wrong one back in the pipe */ for (;;) { ret = write( ntdll_get_thread_data()->wait_fd[1], &reply, sizeof(reply) ); if (ret == sizeof(reply)) break; if (ret >= 0) server_protocol_error( "partial wakeup write %d\n", ret ); if (errno == EINTR) continue; server_protocol_perror("wakeup write"); } return signaled; } if (ret >= 0) server_protocol_error( "partial wakeup read %d\n", ret ); if (errno == EINTR) continue; server_protocol_perror("wakeup read"); } } static void invoke_apc( const user_apc_t *apc ) { switch( apc->type ) { case APC_USER: { void (WINAPI *func)(ULONG_PTR,ULONG_PTR,ULONG_PTR) = wine_server_get_ptr( apc->user.func ); func( apc->user.args[0], apc->user.args[1], apc->user.args[2] ); break; } case APC_TIMER: { void (WINAPI *func)(void*, unsigned int, unsigned int) = wine_server_get_ptr( apc->user.func ); func( wine_server_get_ptr( apc->user.args[1] ), (DWORD)apc->timer.time, (DWORD)(apc->timer.time >> 32) ); break; } default: server_protocol_error( "get_apc_request: bad type %d\n", apc->type ); break; } } /*********************************************************************** * invoke_apc * * Invoke a single APC. * */ static void invoke_system_apc( const apc_call_t *call, apc_result_t *result ) { SIZE_T size, bits; void *addr; memset( result, 0, sizeof(*result) ); switch (call->type) { case APC_NONE: break; case APC_ASYNC_IO: { IO_STATUS_BLOCK *iosb = wine_server_get_ptr( call->async_io.sb ); NTSTATUS (**user)(void *, IO_STATUS_BLOCK *, NTSTATUS) = wine_server_get_ptr( call->async_io.user ); result->type = call->type; result->async_io.status = (*user)( user, iosb, call->async_io.status ); if (result->async_io.status != STATUS_PENDING) result->async_io.total = iosb->Information; break; } case APC_VIRTUAL_ALLOC: result->type = call->type; addr = wine_server_get_ptr( call->virtual_alloc.addr ); size = call->virtual_alloc.size; bits = call->virtual_alloc.zero_bits; if ((ULONG_PTR)addr == call->virtual_alloc.addr && size == call->virtual_alloc.size && bits == call->virtual_alloc.zero_bits) { result->virtual_alloc.status = NtAllocateVirtualMemory( NtCurrentProcess(), &addr, bits, &size, call->virtual_alloc.op_type, call->virtual_alloc.prot ); result->virtual_alloc.addr = wine_server_client_ptr( addr ); result->virtual_alloc.size = size; } else result->virtual_alloc.status = STATUS_WORKING_SET_LIMIT_RANGE; break; case APC_VIRTUAL_FREE: result->type = call->type; addr = wine_server_get_ptr( call->virtual_free.addr ); size = call->virtual_free.size; if ((ULONG_PTR)addr == call->virtual_free.addr && size == call->virtual_free.size) { result->virtual_free.status = NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, call->virtual_free.op_type ); result->virtual_free.addr = wine_server_client_ptr( addr ); result->virtual_free.size = size; } else result->virtual_free.status = STATUS_INVALID_PARAMETER; break; case APC_VIRTUAL_QUERY: { MEMORY_BASIC_INFORMATION info; result->type = call->type; addr = wine_server_get_ptr( call->virtual_query.addr ); if ((ULONG_PTR)addr == call->virtual_query.addr) result->virtual_query.status = NtQueryVirtualMemory( NtCurrentProcess(), addr, MemoryBasicInformation, &info, sizeof(info), NULL ); else result->virtual_query.status = STATUS_WORKING_SET_LIMIT_RANGE; if (result->virtual_query.status == STATUS_SUCCESS) { result->virtual_query.base = wine_server_client_ptr( info.BaseAddress ); result->virtual_query.alloc_base = wine_server_client_ptr( info.AllocationBase ); result->virtual_query.size = info.RegionSize; result->virtual_query.prot = info.Protect; result->virtual_query.alloc_prot = info.AllocationProtect; result->virtual_query.state = info.State >> 12; result->virtual_query.alloc_type = info.Type >> 16; } break; } case APC_VIRTUAL_PROTECT: result->type = call->type; addr = wine_server_get_ptr( call->virtual_protect.addr ); size = call->virtual_protect.size; if ((ULONG_PTR)addr == call->virtual_protect.addr && size == call->virtual_protect.size) { result->virtual_protect.status = NtProtectVirtualMemory( NtCurrentProcess(), &addr, &size, call->virtual_protect.prot, &result->virtual_protect.prot ); result->virtual_protect.addr = wine_server_client_ptr( addr ); result->virtual_protect.size = size; } else result->virtual_protect.status = STATUS_INVALID_PARAMETER; break; case APC_VIRTUAL_FLUSH: result->type = call->type; addr = wine_server_get_ptr( call->virtual_flush.addr ); size = call->virtual_flush.size; if ((ULONG_PTR)addr == call->virtual_flush.addr && size == call->virtual_flush.size) { result->virtual_flush.status = NtFlushVirtualMemory( NtCurrentProcess(), (const void **)&addr, &size, 0 ); result->virtual_flush.addr = wine_server_client_ptr( addr ); result->virtual_flush.size = size; } else result->virtual_flush.status = STATUS_INVALID_PARAMETER; break; case APC_VIRTUAL_LOCK: result->type = call->type; addr = wine_server_get_ptr( call->virtual_lock.addr ); size = call->virtual_lock.size; if ((ULONG_PTR)addr == call->virtual_lock.addr && size == call->virtual_lock.size) { result->virtual_lock.status = NtLockVirtualMemory( NtCurrentProcess(), &addr, &size, 0 ); result->virtual_lock.addr = wine_server_client_ptr( addr ); result->virtual_lock.size = size; } else result->virtual_lock.status = STATUS_INVALID_PARAMETER; break; case APC_VIRTUAL_UNLOCK: result->type = call->type; addr = wine_server_get_ptr( call->virtual_unlock.addr ); size = call->virtual_unlock.size; if ((ULONG_PTR)addr == call->virtual_unlock.addr && size == call->virtual_unlock.size) { result->virtual_unlock.status = NtUnlockVirtualMemory( NtCurrentProcess(), &addr, &size, 0 ); result->virtual_unlock.addr = wine_server_client_ptr( addr ); result->virtual_unlock.size = size; } else result->virtual_unlock.status = STATUS_INVALID_PARAMETER; break; case APC_MAP_VIEW: result->type = call->type; addr = wine_server_get_ptr( call->map_view.addr ); size = call->map_view.size; bits = call->map_view.zero_bits; if ((ULONG_PTR)addr == call->map_view.addr && size == call->map_view.size && bits == call->map_view.zero_bits) { LARGE_INTEGER offset; offset.QuadPart = call->map_view.offset; result->map_view.status = NtMapViewOfSection( wine_server_ptr_handle(call->map_view.handle), NtCurrentProcess(), &addr, bits, 0, &offset, &size, 0, call->map_view.alloc_type, call->map_view.prot ); result->map_view.addr = wine_server_client_ptr( addr ); result->map_view.size = size; } else result->map_view.status = STATUS_INVALID_PARAMETER; NtClose( wine_server_ptr_handle(call->map_view.handle) ); break; case APC_UNMAP_VIEW: result->type = call->type; addr = wine_server_get_ptr( call->unmap_view.addr ); if ((ULONG_PTR)addr == call->unmap_view.addr) result->unmap_view.status = NtUnmapViewOfSection( NtCurrentProcess(), addr ); else result->unmap_view.status = STATUS_INVALID_PARAMETER; break; case APC_CREATE_THREAD: { CLIENT_ID id; HANDLE handle; SIZE_T reserve = call->create_thread.reserve; SIZE_T commit = call->create_thread.commit; void *func = wine_server_get_ptr( call->create_thread.func ); void *arg = wine_server_get_ptr( call->create_thread.arg ); result->type = call->type; if (reserve == call->create_thread.reserve && commit == call->create_thread.commit && (ULONG_PTR)func == call->create_thread.func && (ULONG_PTR)arg == call->create_thread.arg) { result->create_thread.status = RtlCreateUserThread( NtCurrentProcess(), NULL, call->create_thread.suspend, NULL, reserve, commit, func, arg, &handle, &id ); result->create_thread.handle = wine_server_obj_handle( handle ); result->create_thread.tid = HandleToULong(id.UniqueThread); } else result->create_thread.status = STATUS_INVALID_PARAMETER; break; } case APC_BREAK_PROCESS: result->type = APC_BREAK_PROCESS; result->break_process.status = RtlCreateUserThread( NtCurrentProcess(), NULL, FALSE, NULL, 0, 0, DbgUiRemoteBreakin, NULL, NULL, NULL ); break; default: server_protocol_error( "get_apc_request: bad type %d\n", call->type ); break; } } /*********************************************************************** * server_select */ unsigned int CDECL server_select( const select_op_t *select_op, data_size_t size, UINT flags, timeout_t abs_timeout, CONTEXT *context, RTL_CRITICAL_SECTION *cs, user_apc_t *user_apc ) { unsigned int ret; int cookie; obj_handle_t apc_handle = 0; context_t server_context; BOOL suspend_context = FALSE; apc_call_t call; apc_result_t result; sigset_t old_set; memset( &result, 0, sizeof(result) ); if (context) { suspend_context = TRUE; context_to_server( &server_context, context ); } do { pthread_sigmask( SIG_BLOCK, &server_block_set, &old_set ); for (;;) { SERVER_START_REQ( select ) { req->flags = flags; req->cookie = wine_server_client_ptr( &cookie ); req->prev_apc = apc_handle; req->timeout = abs_timeout; req->size = size; wine_server_add_data( req, &result, sizeof(result) ); wine_server_add_data( req, select_op, size ); if (suspend_context) { wine_server_add_data( req, &server_context, sizeof(server_context) ); suspend_context = FALSE; /* server owns the context now */ } if (context) wine_server_set_reply( req, &server_context, sizeof(server_context) ); ret = server_call_unlocked( req ); apc_handle = reply->apc_handle; call = reply->call; if (wine_server_reply_size( reply )) { DWORD context_flags = context->ContextFlags; /* unchanged registers are still available */ context_from_server( context, &server_context ); context->ContextFlags |= context_flags; } } SERVER_END_REQ; if (ret != STATUS_KERNEL_APC) break; invoke_system_apc( &call, &result ); /* don't signal multiple times */ if (size >= sizeof(select_op->signal_and_wait) && select_op->op == SELECT_SIGNAL_AND_WAIT) size = offsetof( select_op_t, signal_and_wait.signal ); } pthread_sigmask( SIG_SETMASK, &old_set, NULL ); if (cs) { RtlLeaveCriticalSection( cs ); cs = NULL; } if (ret != STATUS_PENDING) break; ret = wait_select_reply( &cookie ); } while (ret == STATUS_USER_APC || ret == STATUS_KERNEL_APC); if (ret == STATUS_USER_APC) *user_apc = call.user; return ret; } /*********************************************************************** * server_wait */ unsigned int CDECL server_wait( const select_op_t *select_op, data_size_t size, UINT flags, const LARGE_INTEGER *timeout ) { timeout_t abs_timeout = timeout ? timeout->QuadPart : TIMEOUT_INFINITE; BOOL user_apc = FALSE; unsigned int ret; user_apc_t apc; if (abs_timeout < 0) { LARGE_INTEGER now; RtlQueryPerformanceCounter(&now); abs_timeout -= now.QuadPart; } for (;;) { ret = server_select( select_op, size, flags, abs_timeout, NULL, NULL, &apc ); if (ret != STATUS_USER_APC) break; invoke_apc( &apc ); /* if we ran a user apc we have to check once more if additional apcs are queued, * but we don't want to wait */ abs_timeout = 0; user_apc = TRUE; size = 0; /* don't signal multiple times */ if (size >= sizeof(select_op->signal_and_wait) && select_op->op == SELECT_SIGNAL_AND_WAIT) size = offsetof( select_op_t, signal_and_wait.signal ); } if (ret == STATUS_TIMEOUT && user_apc) ret = STATUS_USER_APC; /* A test on Windows 2000 shows that Windows always yields during a wait, but a wait that is hit by an event gets a priority boost as well. This seems to model that behavior the closest. */ if (ret == STATUS_TIMEOUT) NtYieldExecution(); return ret; } /*********************************************************************** * server_queue_process_apc */ unsigned int CDECL server_queue_process_apc( HANDLE process, const apc_call_t *call, apc_result_t *result ) { for (;;) { unsigned int ret; HANDLE handle = 0; BOOL self = FALSE; SERVER_START_REQ( queue_apc ) { req->handle = wine_server_obj_handle( process ); req->call = *call; if (!(ret = wine_server_call( req ))) { handle = wine_server_ptr_handle( reply->handle ); self = reply->self; } } SERVER_END_REQ; if (ret != STATUS_SUCCESS) return ret; if (self) { invoke_system_apc( call, result ); } else { NtWaitForSingleObject( handle, FALSE, NULL ); SERVER_START_REQ( get_apc_result ) { req->handle = wine_server_obj_handle( handle ); if (!(ret = wine_server_call( req ))) *result = reply->result; } SERVER_END_REQ; if (!ret && result->type == APC_NONE) continue; /* APC didn't run, try again */ } return ret; } } /*********************************************************************** * server_send_fd * * Send a file descriptor to the server. */ void CDECL server_send_fd( int fd ) { struct send_fd data; struct msghdr msghdr; struct iovec vec; int ret; #ifdef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS msghdr.msg_accrights = (void *)&fd; msghdr.msg_accrightslen = sizeof(fd); #else /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */ char cmsg_buffer[256]; struct cmsghdr *cmsg; msghdr.msg_control = cmsg_buffer; msghdr.msg_controllen = sizeof(cmsg_buffer); msghdr.msg_flags = 0; cmsg = CMSG_FIRSTHDR( &msghdr ); cmsg->cmsg_len = CMSG_LEN( sizeof(fd) ); cmsg->cmsg_level = SOL_SOCKET; cmsg->cmsg_type = SCM_RIGHTS; *(int *)CMSG_DATA(cmsg) = fd; msghdr.msg_controllen = cmsg->cmsg_len; #endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */ msghdr.msg_name = NULL; msghdr.msg_namelen = 0; msghdr.msg_iov = &vec; msghdr.msg_iovlen = 1; vec.iov_base = (void *)&data; vec.iov_len = sizeof(data); data.tid = GetCurrentThreadId(); data.fd = fd; for (;;) { if ((ret = sendmsg( fd_socket, &msghdr, 0 )) == sizeof(data)) return; if (ret >= 0) server_protocol_error( "partial write %d\n", ret ); if (errno == EINTR) continue; if (errno == EPIPE) abort_thread(0); server_protocol_perror( "sendmsg" ); } } /*********************************************************************** * receive_fd * * Receive a file descriptor passed from the server. */ static int receive_fd( obj_handle_t *handle ) { struct iovec vec; struct msghdr msghdr; int ret, fd = -1; #ifdef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS msghdr.msg_accrights = (void *)&fd; msghdr.msg_accrightslen = sizeof(fd); #else /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */ char cmsg_buffer[256]; msghdr.msg_control = cmsg_buffer; msghdr.msg_controllen = sizeof(cmsg_buffer); msghdr.msg_flags = 0; #endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */ msghdr.msg_name = NULL; msghdr.msg_namelen = 0; msghdr.msg_iov = &vec; msghdr.msg_iovlen = 1; vec.iov_base = (void *)handle; vec.iov_len = sizeof(*handle); for (;;) { if ((ret = recvmsg( fd_socket, &msghdr, MSG_CMSG_CLOEXEC )) > 0) { #ifndef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS struct cmsghdr *cmsg; for (cmsg = CMSG_FIRSTHDR( &msghdr ); cmsg; cmsg = CMSG_NXTHDR( &msghdr, cmsg )) { if (cmsg->cmsg_level != SOL_SOCKET) continue; if (cmsg->cmsg_type == SCM_RIGHTS) fd = *(int *)CMSG_DATA(cmsg); #ifdef SCM_CREDENTIALS else if (cmsg->cmsg_type == SCM_CREDENTIALS) { struct ucred *ucred = (struct ucred *)CMSG_DATA(cmsg); server_pid = ucred->pid; } #endif } #endif /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */ if (fd != -1) fcntl( fd, F_SETFD, FD_CLOEXEC ); /* in case MSG_CMSG_CLOEXEC is not supported */ return fd; } if (!ret) break; if (errno == EINTR) continue; if (errno == EPIPE) break; server_protocol_perror("recvmsg"); } /* the server closed the connection; time to die... */ abort_thread(0); } /***********************************************************************/ /* fd cache support */ union fd_cache_entry { LONG64 data; struct { int fd; enum server_fd_type type : 5; unsigned int access : 3; unsigned int options : 24; } s; }; C_ASSERT( sizeof(union fd_cache_entry) == sizeof(LONG64) ); #define FD_CACHE_BLOCK_SIZE (65536 / sizeof(union fd_cache_entry)) #define FD_CACHE_ENTRIES 128 static union fd_cache_entry *fd_cache[FD_CACHE_ENTRIES]; static union fd_cache_entry fd_cache_initial_block[FD_CACHE_BLOCK_SIZE]; static inline unsigned int handle_to_index( HANDLE handle, unsigned int *entry ) { unsigned int idx = (wine_server_obj_handle(handle) >> 2) - 1; *entry = idx / FD_CACHE_BLOCK_SIZE; return idx % FD_CACHE_BLOCK_SIZE; } /*********************************************************************** * add_fd_to_cache * * Caller must hold fd_cache_section. */ static BOOL add_fd_to_cache( HANDLE handle, int fd, enum server_fd_type type, unsigned int access, unsigned int options ) { unsigned int entry, idx = handle_to_index( handle, &entry ); union fd_cache_entry cache; if (entry >= FD_CACHE_ENTRIES) { FIXME( "too many allocated handles, not caching %p\n", handle ); return FALSE; } if (!fd_cache[entry]) /* do we need to allocate a new block of entries? */ { if (!entry) fd_cache[0] = fd_cache_initial_block; else { void *ptr = wine_anon_mmap( NULL, FD_CACHE_BLOCK_SIZE * sizeof(union fd_cache_entry), PROT_READ | PROT_WRITE, 0 ); if (ptr == MAP_FAILED) return FALSE; fd_cache[entry] = ptr; } } /* store fd+1 so that 0 can be used as the unset value */ cache.s.fd = fd + 1; cache.s.type = type; cache.s.access = access; cache.s.options = options; cache.data = interlocked_xchg64( &fd_cache[entry][idx].data, cache.data ); assert( !cache.s.fd ); return TRUE; } /*********************************************************************** * get_cached_fd */ static inline NTSTATUS get_cached_fd( HANDLE handle, int *fd, enum server_fd_type *type, unsigned int *access, unsigned int *options ) { unsigned int entry, idx = handle_to_index( handle, &entry ); union fd_cache_entry cache; if (entry >= FD_CACHE_ENTRIES || !fd_cache[entry]) return STATUS_INVALID_HANDLE; cache.data = InterlockedCompareExchange64( &fd_cache[entry][idx].data, 0, 0 ); if (!cache.data) return STATUS_INVALID_HANDLE; /* if fd type is invalid, fd stores an error value */ if (cache.s.type == FD_TYPE_INVALID) return cache.s.fd - 1; *fd = cache.s.fd - 1; if (type) *type = cache.s.type; if (access) *access = cache.s.access; if (options) *options = cache.s.options; return STATUS_SUCCESS; } /*********************************************************************** * remove_fd_from_cache */ static int remove_fd_from_cache( HANDLE handle ) { unsigned int entry, idx = handle_to_index( handle, &entry ); int fd = -1; if (entry < FD_CACHE_ENTRIES && fd_cache[entry]) { union fd_cache_entry cache; cache.data = interlocked_xchg64( &fd_cache[entry][idx].data, 0 ); if (cache.s.type != FD_TYPE_INVALID) fd = cache.s.fd - 1; } return fd; } /*********************************************************************** * server_get_unix_fd * * The returned unix_fd should be closed iff needs_close is non-zero. */ int CDECL server_get_unix_fd( HANDLE handle, unsigned int wanted_access, int *unix_fd, int *needs_close, enum server_fd_type *type, unsigned int *options ) { sigset_t sigset; obj_handle_t fd_handle; int ret, fd = -1; unsigned int access = 0; *unix_fd = -1; *needs_close = 0; wanted_access &= FILE_READ_DATA | FILE_WRITE_DATA | FILE_APPEND_DATA; ret = get_cached_fd( handle, &fd, type, &access, options ); if (ret != STATUS_INVALID_HANDLE) goto done; server_enter_uninterrupted_section( &fd_cache_section, &sigset ); ret = get_cached_fd( handle, &fd, type, &access, options ); if (ret == STATUS_INVALID_HANDLE) { SERVER_START_REQ( get_handle_fd ) { req->handle = wine_server_obj_handle( handle ); if (!(ret = wine_server_call( req ))) { if (type) *type = reply->type; if (options) *options = reply->options; access = reply->access; if ((fd = receive_fd( &fd_handle )) != -1) { assert( wine_server_ptr_handle(fd_handle) == handle ); *needs_close = (!reply->cacheable || !add_fd_to_cache( handle, fd, reply->type, reply->access, reply->options )); } else ret = STATUS_TOO_MANY_OPENED_FILES; } else if (reply->cacheable) { add_fd_to_cache( handle, ret, FD_TYPE_INVALID, 0, 0 ); } } SERVER_END_REQ; } server_leave_uninterrupted_section( &fd_cache_section, &sigset ); done: if (!ret && ((access & wanted_access) != wanted_access)) { ret = STATUS_ACCESS_DENIED; if (*needs_close) close( fd ); } if (!ret) *unix_fd = fd; return ret; } /*********************************************************************** * server_fd_to_handle */ NTSTATUS CDECL server_fd_to_handle( int fd, unsigned int access, unsigned int attributes, HANDLE *handle ) { NTSTATUS ret; *handle = 0; wine_server_send_fd( fd ); SERVER_START_REQ( alloc_file_handle ) { req->access = access; req->attributes = attributes; req->fd = fd; if (!(ret = wine_server_call( req ))) *handle = wine_server_ptr_handle( reply->handle ); } SERVER_END_REQ; return ret; } /*********************************************************************** * server_handle_to_fd * * Retrieve the file descriptor corresponding to a file handle. */ NTSTATUS CDECL server_handle_to_fd( HANDLE handle, unsigned int access, int *unix_fd, unsigned int *options ) { int needs_close; NTSTATUS ret = server_get_unix_fd( handle, access, unix_fd, &needs_close, NULL, options ); if (!ret && !needs_close) { if ((*unix_fd = dup(*unix_fd)) == -1) ret = STATUS_TOO_MANY_OPENED_FILES; } return ret; } /*********************************************************************** * server_release_fd */ void CDECL server_release_fd( HANDLE handle, int unix_fd ) { close( unix_fd ); } /*********************************************************************** * server_pipe * * Create a pipe for communicating with the server. */ int CDECL server_pipe( int fd[2] ) { int ret; #ifdef HAVE_PIPE2 static BOOL have_pipe2 = TRUE; if (have_pipe2) { if (!(ret = pipe2( fd, O_CLOEXEC ))) return ret; if (errno == ENOSYS || errno == EINVAL) have_pipe2 = FALSE; /* don't try again */ } #endif if (!(ret = pipe( fd ))) { fcntl( fd[0], F_SETFD, FD_CLOEXEC ); fcntl( fd[1], F_SETFD, FD_CLOEXEC ); } return ret; } /*********************************************************************** * init_server_dir */ static const char *init_server_dir( dev_t dev, ino_t ino ) { char *p, *dir; size_t len = sizeof("/server-") + 2 * sizeof(dev) + 2 * sizeof(ino) + 2; #ifdef __ANDROID__ /* there's no /tmp dir on Android */ len += strlen( config_dir ) + sizeof("/.wineserver"); dir = malloc( len ); strcpy( dir, config_dir ); strcat( dir, "/.wineserver/server-" ); #else len += sizeof("/tmp/.wine-") + 12; dir = malloc( len ); sprintf( dir, "/tmp/.wine-%u/server-", getuid() ); #endif p = dir + strlen( dir ); if (dev != (unsigned long)dev) p += sprintf( p, "%lx%08lx-", (unsigned long)((unsigned long long)dev >> 32), (unsigned long)dev ); else p += sprintf( p, "%lx-", (unsigned long)dev ); if (ino != (unsigned long)ino) sprintf( p, "%lx%08lx", (unsigned long)((unsigned long long)ino >> 32), (unsigned long)ino ); else sprintf( p, "%lx", (unsigned long)ino ); return dir; } /*********************************************************************** * setup_config_dir * * Setup the wine configuration dir. */ static int setup_config_dir(void) { char *p; struct stat st; int fd_cwd = open( ".", O_RDONLY ); if (chdir( config_dir ) == -1) { if (errno != ENOENT) fatal_perror( "cannot use directory %s", config_dir ); if ((p = strrchr( config_dir, '/' )) && p != config_dir) { while (p > config_dir + 1 && p[-1] == '/') p--; *p = 0; if (!stat( config_dir, &st ) && st.st_uid != getuid()) fatal_error( "'%s' is not owned by you, refusing to create a configuration directory there\n", config_dir ); *p = '/'; } mkdir( config_dir, 0777 ); if (chdir( config_dir ) == -1) fatal_perror( "chdir to %s", config_dir ); MESSAGE( "wine: created the configuration directory '%s'\n", config_dir ); } if (stat( ".", &st ) == -1) fatal_perror( "stat %s", config_dir ); if (st.st_uid != getuid()) fatal_error( "'%s' is not owned by you\n", config_dir ); server_dir = init_server_dir( st.st_dev, st.st_ino ); if (!mkdir( "dosdevices", 0777 )) { mkdir( "drive_c", 0777 ); symlink( "../drive_c", "dosdevices/c:" ); symlink( "/", "dosdevices/z:" ); } else if (errno != EEXIST) fatal_perror( "cannot create %s/dosdevices", config_dir ); if (fd_cwd == -1) fd_cwd = open( "dosdevices/c:", O_RDONLY ); fcntl( fd_cwd, F_SETFD, FD_CLOEXEC ); return fd_cwd; } /*********************************************************************** * server_connect_error * * Try to display a meaningful explanation of why we couldn't connect * to the server. */ static void server_connect_error( const char *serverdir ) { int fd; struct flock fl; if ((fd = open( LOCKNAME, O_WRONLY )) == -1) fatal_error( "for some mysterious reason, the wine server never started.\n" ); fl.l_type = F_WRLCK; fl.l_whence = SEEK_SET; fl.l_start = 0; fl.l_len = 1; if (fcntl( fd, F_GETLK, &fl ) != -1) { if (fl.l_type == F_WRLCK) /* the file is locked */ fatal_error( "a wine server seems to be running, but I cannot connect to it.\n" " You probably need to kill that process (it might be pid %d).\n", (int)fl.l_pid ); fatal_error( "for some mysterious reason, the wine server failed to run.\n" ); } fatal_error( "the file system of '%s' doesn't support locks,\n" " and there is a 'socket' file in that directory that prevents wine from starting.\n" " You should make sure no wine server is running, remove that file and try again.\n", serverdir ); } /*********************************************************************** * server_connect * * Attempt to connect to an existing server socket. * We need to be in the server directory already. */ static int server_connect(void) { struct sockaddr_un addr; struct stat st; int s, slen, retry, fd_cwd; fd_cwd = setup_config_dir(); /* chdir to the server directory */ if (chdir( server_dir ) == -1) { if (errno != ENOENT) fatal_perror( "chdir to %s", server_dir ); start_server( TRACE_ON(server) ); if (chdir( server_dir ) == -1) fatal_perror( "chdir to %s", server_dir ); } /* make sure we are at the right place */ if (stat( ".", &st ) == -1) fatal_perror( "stat %s", server_dir ); if (st.st_uid != getuid()) fatal_error( "'%s' is not owned by you\n", server_dir ); if (st.st_mode & 077) fatal_error( "'%s' must not be accessible by other users\n", server_dir ); for (retry = 0; retry < 6; retry++) { /* if not the first try, wait a bit to leave the previous server time to exit */ if (retry) { usleep( 100000 * retry * retry ); start_server( TRACE_ON(server) ); if (lstat( SOCKETNAME, &st ) == -1) continue; /* still no socket, wait a bit more */ } else if (lstat( SOCKETNAME, &st ) == -1) /* check for an already existing socket */ { if (errno != ENOENT) fatal_perror( "lstat %s/%s", server_dir, SOCKETNAME ); start_server( TRACE_ON(server) ); if (lstat( SOCKETNAME, &st ) == -1) continue; /* still no socket, wait a bit more */ } /* make sure the socket is sane (ISFIFO needed for Solaris) */ if (!S_ISSOCK(st.st_mode) && !S_ISFIFO(st.st_mode)) fatal_error( "'%s/%s' is not a socket\n", server_dir, SOCKETNAME ); if (st.st_uid != getuid()) fatal_error( "'%s/%s' is not owned by you\n", server_dir, SOCKETNAME ); /* try to connect to it */ addr.sun_family = AF_UNIX; strcpy( addr.sun_path, SOCKETNAME ); slen = sizeof(addr) - sizeof(addr.sun_path) + strlen(addr.sun_path) + 1; #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN addr.sun_len = slen; #endif if ((s = socket( AF_UNIX, SOCK_STREAM, 0 )) == -1) fatal_perror( "socket" ); #ifdef SO_PASSCRED else { int enable = 1; setsockopt( s, SOL_SOCKET, SO_PASSCRED, &enable, sizeof(enable) ); } #endif if (connect( s, (struct sockaddr *)&addr, slen ) != -1) { /* switch back to the starting directory */ if (fd_cwd != -1) { fchdir( fd_cwd ); close( fd_cwd ); } fcntl( s, F_SETFD, FD_CLOEXEC ); return s; } close( s ); } server_connect_error( server_dir ); } #ifdef __APPLE__ #include #include #include /* send our task port to the server */ static void send_server_task_port(void) { mach_port_t bootstrap_port, wineserver_port; kern_return_t kret; struct { mach_msg_header_t header; mach_msg_body_t body; mach_msg_port_descriptor_t task_port; } msg; if (task_get_bootstrap_port(mach_task_self(), &bootstrap_port) != KERN_SUCCESS) return; if (!server_dir) { struct stat st; stat( config_dir, &st ); server_dir = init_server_dir( st.st_dev, st.st_ino ); } kret = bootstrap_look_up(bootstrap_port, server_dir, &wineserver_port); if (kret != KERN_SUCCESS) fatal_error( "cannot find the server port: 0x%08x\n", kret ); mach_port_deallocate(mach_task_self(), bootstrap_port); msg.header.msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0) | MACH_MSGH_BITS_COMPLEX; msg.header.msgh_size = sizeof(msg); msg.header.msgh_remote_port = wineserver_port; msg.header.msgh_local_port = MACH_PORT_NULL; msg.body.msgh_descriptor_count = 1; msg.task_port.name = mach_task_self(); msg.task_port.disposition = MACH_MSG_TYPE_COPY_SEND; msg.task_port.type = MACH_MSG_PORT_DESCRIPTOR; kret = mach_msg_send(&msg.header); if (kret != KERN_SUCCESS) server_protocol_error( "mach_msg_send failed: 0x%08x\n", kret ); mach_port_deallocate(mach_task_self(), wineserver_port); } #endif /* __APPLE__ */ /*********************************************************************** * get_unix_tid * * Retrieve the Unix tid to use on the server side for the current thread. */ static int get_unix_tid(void) { int ret = -1; #ifdef HAVE_PTHREAD_GETTHREADID_NP ret = pthread_getthreadid_np(); #elif defined(linux) ret = syscall( __NR_gettid ); #elif defined(__sun) ret = pthread_self(); #elif defined(__APPLE__) ret = mach_thread_self(); mach_port_deallocate(mach_task_self(), ret); #elif defined(__NetBSD__) ret = _lwp_self(); #elif defined(__FreeBSD__) long lwpid; thr_self( &lwpid ); ret = lwpid; #elif defined(__DragonFly__) ret = lwp_gettid(); #endif return ret; } /*********************************************************************** * server_init_process * * Start the server and create the initial socket pair. */ void CDECL server_init_process(void) { obj_handle_t version; const char *env_socket = getenv( "WINESERVERSOCKET" ); server_pid = -1; if (env_socket) { fd_socket = atoi( env_socket ); if (fcntl( fd_socket, F_SETFD, FD_CLOEXEC ) == -1) fatal_perror( "Bad server socket %d", fd_socket ); unsetenv( "WINESERVERSOCKET" ); } else { const char *arch = getenv( "WINEARCH" ); if (arch && strcmp( arch, "win32" ) && strcmp( arch, "win64" )) fatal_error( "WINEARCH set to invalid value '%s', it must be either win32 or win64.\n", arch ); fd_socket = server_connect(); } /* setup the signal mask */ sigemptyset( &server_block_set ); sigaddset( &server_block_set, SIGALRM ); sigaddset( &server_block_set, SIGIO ); sigaddset( &server_block_set, SIGINT ); sigaddset( &server_block_set, SIGHUP ); sigaddset( &server_block_set, SIGUSR1 ); sigaddset( &server_block_set, SIGUSR2 ); sigaddset( &server_block_set, SIGCHLD ); pthread_sigmask( SIG_BLOCK, &server_block_set, NULL ); /* receive the first thread request fd on the main socket */ ntdll_get_thread_data()->request_fd = receive_fd( &version ); #ifdef SO_PASSCRED /* now that we hopefully received the server_pid, disable SO_PASSCRED */ { int enable = 0; setsockopt( fd_socket, SOL_SOCKET, SO_PASSCRED, &enable, sizeof(enable) ); } #endif if (version != SERVER_PROTOCOL_VERSION) server_protocol_error( "version mismatch %d/%d.\n" "Your %s binary was not upgraded correctly,\n" "or you have an older one somewhere in your PATH.\n" "Or maybe the wrong wineserver is still running?\n", version, SERVER_PROTOCOL_VERSION, (version > SERVER_PROTOCOL_VERSION) ? "wine" : "wineserver" ); #if defined(__linux__) && defined(HAVE_PRCTL) /* work around Ubuntu's ptrace breakage */ if (server_pid != -1) prctl( 0x59616d61 /* PR_SET_PTRACER */, server_pid ); #endif } /*********************************************************************** * server_init_process_done */ void CDECL server_init_process_done(void) { #ifdef __APPLE__ send_server_task_port(); #endif } /*********************************************************************** * server_init_thread * * Send an init thread request. */ size_t CDECL server_init_thread( void *entry_point, BOOL *suspend, unsigned int *cpus, BOOL *wow64, timeout_t *start_time ) { static const char *cpu_names[] = { "x86", "x86_64", "PowerPC", "ARM", "ARM64" }; const char *arch = getenv( "WINEARCH" ); int ret; int reply_pipe[2]; struct sigaction sig_act; size_t info_size; sig_act.sa_handler = SIG_IGN; sig_act.sa_flags = 0; sigemptyset( &sig_act.sa_mask ); /* ignore SIGPIPE so that we get an EPIPE error instead */ sigaction( SIGPIPE, &sig_act, NULL ); /* create the server->client communication pipes */ if (server_pipe( reply_pipe ) == -1) server_protocol_perror( "pipe" ); if (server_pipe( ntdll_get_thread_data()->wait_fd ) == -1) server_protocol_perror( "pipe" ); wine_server_send_fd( reply_pipe[1] ); wine_server_send_fd( ntdll_get_thread_data()->wait_fd[1] ); ntdll_get_thread_data()->reply_fd = reply_pipe[0]; close( reply_pipe[1] ); SERVER_START_REQ( init_thread ) { req->unix_pid = getpid(); req->unix_tid = get_unix_tid(); req->teb = wine_server_client_ptr( NtCurrentTeb() ); req->entry = wine_server_client_ptr( entry_point ); req->reply_fd = reply_pipe[1]; req->wait_fd = ntdll_get_thread_data()->wait_fd[1]; req->debug_level = (TRACE_ON(server) != 0); req->cpu = client_cpu; ret = wine_server_call( req ); NtCurrentTeb()->ClientId.UniqueProcess = ULongToHandle(reply->pid); NtCurrentTeb()->ClientId.UniqueThread = ULongToHandle(reply->tid); info_size = reply->info_size; server_start_time = reply->server_start; server_cpus = reply->all_cpus; *suspend = reply->suspend; } SERVER_END_REQ; is_wow64 = !is_win64 && (server_cpus & ((1 << CPU_x86_64) | (1 << CPU_ARM64))) != 0; ntdll_get_thread_data()->wow64_redir = is_wow64; switch (ret) { case STATUS_SUCCESS: if (arch) { if (!strcmp( arch, "win32" ) && (is_win64 || is_wow64)) fatal_error( "WINEARCH set to win32 but '%s' is a 64-bit installation.\n", config_dir ); if (!strcmp( arch, "win64" ) && !is_win64 && !is_wow64) fatal_error( "WINEARCH set to win64 but '%s' is a 32-bit installation.\n", config_dir ); } if (cpus) *cpus = server_cpus; if (wow64) *wow64 = is_wow64; if (start_time) *start_time = server_start_time; return info_size; case STATUS_INVALID_IMAGE_WIN_64: fatal_error( "'%s' is a 32-bit installation, it cannot support 64-bit applications.\n", config_dir ); case STATUS_NOT_SUPPORTED: fatal_error( "'%s' is a 64-bit installation, it cannot be used with a 32-bit wineserver.\n", config_dir ); case STATUS_INVALID_IMAGE_FORMAT: fatal_error( "wineserver doesn't support the %s architecture\n", cpu_names[client_cpu] ); default: server_protocol_error( "init_thread failed with status %x\n", ret ); } } /****************************************************************************** * NtDuplicateObject */ NTSTATUS WINAPI NtDuplicateObject( HANDLE source_process, HANDLE source, HANDLE dest_process, HANDLE *dest, ACCESS_MASK access, ULONG attributes, ULONG options ) { NTSTATUS ret; SERVER_START_REQ( dup_handle ) { req->src_process = wine_server_obj_handle( source_process ); req->src_handle = wine_server_obj_handle( source ); req->dst_process = wine_server_obj_handle( dest_process ); req->access = access; req->attributes = attributes; req->options = options; if (!(ret = wine_server_call( req ))) { if (dest) *dest = wine_server_ptr_handle( reply->handle ); if (reply->closed && reply->self) { int fd = remove_fd_from_cache( source ); if (fd != -1) close( fd ); } } } SERVER_END_REQ; return ret; } /************************************************************************** * NtClose */ NTSTATUS WINAPI NtClose( HANDLE handle ) { NTSTATUS ret; int fd = remove_fd_from_cache( handle ); SERVER_START_REQ( close_handle ) { req->handle = wine_server_obj_handle( handle ); ret = wine_server_call( req ); } SERVER_END_REQ; if (fd != -1) close( fd ); return ret; }