dlls/kernel32/debugger.c

   1 /*
   2  * Win32 debugger functions
   3  *
   4  * Copyright (C) 1999 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 <stdio.h>
  23 #include <string.h>
  24
  25 #include "ntstatus.h"
  26 #define WIN32_NO_STATUS
  27 #include "winerror.h"
  28 #include "wine/server.h"
  29 #include "kernel_private.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(debugstr);
  33
  34
  35 /******************************************************************************
  36  *           WaitForDebugEvent   (KERNEL32.@)
  37  *
  38  *  Waits for a debugging event to occur in a process being debugged before
  39  *  filling out the debug event structure.
  40  *
  41  * PARAMS
  42  *  event   [O] Address of structure for event information.
  43  *  timeout [I] Number of milliseconds to wait for event.
  44  *
  45  * RETURNS
  46  *
  47  *  Returns true if a debug event occurred and false if the call timed out.
  48  */
  49 BOOL WINAPI WaitForDebugEvent(
  50     LPDEBUG_EVENT event,
  51     DWORD         timeout)
  52 {
  53     BOOL ret;
  54     DWORD i, res;
  55
  56     for (;;)
  57     {
  58         HANDLE wait = 0;
  59         debug_event_t data;
  60         SERVER_START_REQ( wait_debug_event )
  61         {
  62             req->get_handle = (timeout != 0);
  63             wine_server_set_reply( req, &data, sizeof(data) );
  64             if (!(ret = !wine_server_call_err( req ))) goto done;
  65
  66             if (!wine_server_reply_size(reply))  /* timeout */
  67             {
  68                 wait = wine_server_ptr_handle( reply->wait );
  69                 ret = FALSE;
  70                 goto done;
  71             }
  72             event->dwDebugEventCode = data.code;
  73             event->dwProcessId      = (DWORD)reply->pid;
  74             event->dwThreadId       = (DWORD)reply->tid;
  75             switch(data.code)
  76             {
  77             case EXCEPTION_DEBUG_EVENT:
  78                 event->u.Exception.dwFirstChance = data.exception.first;
  79                 event->u.Exception.ExceptionRecord.ExceptionCode    = data.exception.exc_code;
  80                 event->u.Exception.ExceptionRecord.ExceptionFlags   = data.exception.flags;
  81                 event->u.Exception.ExceptionRecord.ExceptionRecord  = wine_server_get_ptr( data.exception.record );
  82                 event->u.Exception.ExceptionRecord.ExceptionAddress = wine_server_get_ptr( data.exception.address );
  83                 event->u.Exception.ExceptionRecord.NumberParameters = data.exception.nb_params;
  84                 for (i = 0; i < data.exception.nb_params; i++)
  85                     event->u.Exception.ExceptionRecord.ExceptionInformation[i] = data.exception.params[i];
  86                 break;
  87             case CREATE_THREAD_DEBUG_EVENT:
  88                 event->u.CreateThread.hThread           = wine_server_ptr_handle( data.create_thread.handle );
  89                 event->u.CreateThread.lpThreadLocalBase = wine_server_get_ptr( data.create_thread.teb );
  90                 event->u.CreateThread.lpStartAddress    = wine_server_get_ptr( data.create_thread.start );
  91                 break;
  92             case CREATE_PROCESS_DEBUG_EVENT:
  93                 event->u.CreateProcessInfo.hFile                 = wine_server_ptr_handle( data.create_process.file );
  94                 event->u.CreateProcessInfo.hProcess              = wine_server_ptr_handle( data.create_process.process );
  95                 event->u.CreateProcessInfo.hThread               = wine_server_ptr_handle( data.create_process.thread );
  96                 event->u.CreateProcessInfo.lpBaseOfImage         = wine_server_get_ptr( data.create_process.base );
  97                 event->u.CreateProcessInfo.dwDebugInfoFileOffset = data.create_process.dbg_offset;
  98                 event->u.CreateProcessInfo.nDebugInfoSize        = data.create_process.dbg_size;
  99                 event->u.CreateProcessInfo.lpThreadLocalBase     = wine_server_get_ptr( data.create_process.teb );
 100                 event->u.CreateProcessInfo.lpStartAddress        = wine_server_get_ptr( data.create_process.start );
 101                 event->u.CreateProcessInfo.lpImageName           = wine_server_get_ptr( data.create_process.name );
 102                 event->u.CreateProcessInfo.fUnicode              = data.create_process.unicode;
 103                 break;
 104             case EXIT_THREAD_DEBUG_EVENT:
 105                 event->u.ExitThread.dwExitCode = data.exit.exit_code;
 106                 break;
 107             case EXIT_PROCESS_DEBUG_EVENT:
 108                 event->u.ExitProcess.dwExitCode = data.exit.exit_code;
 109                 break;
 110             case LOAD_DLL_DEBUG_EVENT:
 111                 event->u.LoadDll.hFile                 = wine_server_ptr_handle( data.load_dll.handle );
 112                 event->u.LoadDll.lpBaseOfDll           = wine_server_get_ptr( data.load_dll.base );
 113                 event->u.LoadDll.dwDebugInfoFileOffset = data.load_dll.dbg_offset;
 114                 event->u.LoadDll.nDebugInfoSize        = data.load_dll.dbg_size;
 115                 event->u.LoadDll.lpImageName           = wine_server_get_ptr( data.load_dll.name );
 116                 event->u.LoadDll.fUnicode              = data.load_dll.unicode;
 117                 break;
 118             case UNLOAD_DLL_DEBUG_EVENT:
 119                 event->u.UnloadDll.lpBaseOfDll = wine_server_get_ptr( data.unload_dll.base );
 120                 break;
 121             case OUTPUT_DEBUG_STRING_EVENT:
 122                 event->u.DebugString.lpDebugStringData  = wine_server_get_ptr( data.output_string.string );
 123                 event->u.DebugString.fUnicode           = FALSE;
 124                 event->u.DebugString.nDebugStringLength = data.output_string.length;
 125                 break;
 126             case RIP_EVENT:
 127                 event->u.RipInfo.dwError = data.rip_info.error;
 128                 event->u.RipInfo.dwType  = data.rip_info.type;
 129                 break;
 130             }
 131         done:
 132             /* nothing */ ;
 133         }
 134         SERVER_END_REQ;
 135         if (ret) return TRUE;
 136         if (!wait) break;
 137         res = WaitForSingleObject( wait, timeout );
 138         CloseHandle( wait );
 139         if (res != STATUS_WAIT_0) break;
 140     }
 141     SetLastError( ERROR_SEM_TIMEOUT );
 142     return FALSE;
 143 }
 144
 145
 146 /**********************************************************************
 147  *           ContinueDebugEvent   (KERNEL32.@)
 148  *
 149  *  Enables a thread that previously produced a debug event to continue.
 150  *
 151  * PARAMS
 152  *  pid    [I] The id of the process to continue.
 153  *  tid    [I] The id of the thread to continue.
 154  *  status [I] The rule to apply to unhandled exeptions.
 155  *
 156  * RETURNS
 157  *
 158  *  True if the debugger is listed as the processes owner and the process
 159  *  and thread are valid.
 160  */
 161 BOOL WINAPI ContinueDebugEvent(
 162     DWORD pid,
 163     DWORD tid,
 164     DWORD status)
 165 {
 166     BOOL ret;
 167     SERVER_START_REQ( continue_debug_event )
 168     {
 169         req->pid    = pid;
 170         req->tid    = tid;
 171         req->status = status;
 172         ret = !wine_server_call_err( req );
 173     }
 174     SERVER_END_REQ;
 175     return ret;
 176 }
 177
 178
 179 /**********************************************************************
 180  *           DebugActiveProcess   (KERNEL32.@)
 181  *
 182  *  Attempts to attach the debugger to a process.
 183  *
 184  * PARAMS
 185  *  pid [I] The process to be debugged.
 186  *
 187  * RETURNS
 188  *
 189  *  True if the debugger was attached to process.
 190  */
 191 BOOL WINAPI DebugActiveProcess( DWORD pid )
 192 {
 193     BOOL ret;
 194     SERVER_START_REQ( debug_process )
 195     {
 196         req->pid = pid;
 197         req->attach = 1;
 198         ret = !wine_server_call_err( req );
 199     }
 200     SERVER_END_REQ;
 201     return ret;
 202 }
 203
 204 /**********************************************************************
 205  *           DebugActiveProcessStop   (KERNEL32.@)
 206  *
 207  *  Attempts to detach the debugger from a process.
 208  *
 209  * PARAMS
 210  *  pid [I] The process to be detached.
 211  *
 212  * RETURNS
 213  *
 214  *  True if the debugger was detached from the process.
 215  */
 216 BOOL WINAPI DebugActiveProcessStop( DWORD pid )
 217 {
 218     BOOL ret;
 219     SERVER_START_REQ( debug_process )
 220     {
 221         req->pid = pid;
 222         req->attach = 0;
 223         ret = !wine_server_call_err( req );
 224     }
 225     SERVER_END_REQ;
 226     return ret;
 227 }
 228
 229
 230 /***********************************************************************
 231  *           OutputDebugStringA   (KERNEL32.@)
 232  *
 233  *  Output by an application of an ascii string to a debugger (if attached)
 234  *  and program log.
 235  *
 236  * PARAMS
 237  *  str [I] The message to be logged and given to the debugger.
 238  *
 239  * RETURNS
 240  *
 241  *  Nothing.
 242  */
 243 void WINAPI OutputDebugStringA( LPCSTR str )
 244 {
 245     static HANDLE DBWinMutex = NULL;
 246     static BOOL mutex_inited = FALSE;
 247
 248     /* send string to attached debugger */
 249     SERVER_START_REQ( output_debug_string )
 250     {
 251         req->string  = wine_server_client_ptr( str );
 252         req->length  = strlen(str) + 1;
 253         wine_server_call( req );
 254     }
 255     SERVER_END_REQ;
 256
 257     WARN("%s\n", debugstr_a(str));
 258
 259     /* send string to a system-wide monitor */
 260     /* FIXME should only send to monitor if no debuggers are attached */
 261
 262     if (!mutex_inited)
 263     {
 264         /* first call to OutputDebugString, initialize mutex handle */
 265         static const WCHAR mutexname[] = {'D','B','W','i','n','M','u','t','e','x',0};
 266         HANDLE mutex = CreateMutexExW( NULL, mutexname, 0, SYNCHRONIZE );
 267         if (mutex)
 268         {
 269             if (InterlockedCompareExchangePointer( &DBWinMutex, mutex, 0 ) != 0)
 270             {
 271                 /* someone beat us here... */
 272                 CloseHandle( mutex );
 273             }
 274         }
 275         mutex_inited = TRUE;
 276     }
 277
 278     if (DBWinMutex)
 279     {
 280         static const WCHAR shmname[] = {'D','B','W','I','N','_','B','U','F','F','E','R',0};
 281         static const WCHAR eventbuffername[] = {'D','B','W','I','N','_','B','U','F','F','E','R','_','R','E','A','D','Y',0};
 282         static const WCHAR eventdataname[] = {'D','B','W','I','N','_','D','A','T','A','_','R','E','A','D','Y',0};
 283         HANDLE mapping;
 284
 285         mapping = OpenFileMappingW( FILE_MAP_WRITE, FALSE, shmname );
 286         if (mapping)
 287         {
 288             LPVOID buffer;
 289             HANDLE eventbuffer, eventdata;
 290
 291             buffer = MapViewOfFile( mapping, FILE_MAP_WRITE, 0, 0, 0 );
 292             eventbuffer = OpenEventW( SYNCHRONIZE, FALSE, eventbuffername );
 293             eventdata = OpenEventW( EVENT_MODIFY_STATE, FALSE, eventdataname );
 294
 295             if (buffer && eventbuffer && eventdata)
 296             {
 297                 /* monitor is present, synchronize with other OutputDebugString invocations */
 298                 WaitForSingleObject( DBWinMutex, INFINITE );
 299
 300                 /* acquire control over the buffer */
 301                 if (WaitForSingleObject( eventbuffer, 10000 ) == WAIT_OBJECT_0)
 302                 {
 303                     int str_len;
 304                     struct _mon_buffer_t {
 305                         DWORD pid;
 306                         char buffer[1];
 307                     } *mon_buffer = (struct _mon_buffer_t*) buffer;
 308
 309                     str_len = strlen( str );
 310                     if (str_len > (4096 - sizeof(DWORD) - 1))
 311                         str_len = 4096 - sizeof(DWORD) - 1;
 312
 313                     mon_buffer->pid = GetCurrentProcessId();
 314                     memcpy( mon_buffer->buffer, str, str_len );
 315                     mon_buffer->buffer[str_len] = 0;
 316
 317                     /* signal data ready */
 318                     SetEvent( eventdata );
 319                 }
 320                 ReleaseMutex( DBWinMutex );
 321             }
 322
 323             if (buffer)
 324                 UnmapViewOfFile( buffer );
 325             if (eventbuffer)
 326                 CloseHandle( eventbuffer );
 327             if (eventdata)
 328                 CloseHandle( eventdata );
 329             CloseHandle( mapping );
 330         }
 331     }
 332 }
 333
 334
 335 /***********************************************************************
 336  *           OutputDebugStringW   (KERNEL32.@)
 337  *
 338  *  Output by an application of a unicode string to a debugger (if attached)
 339  *  and program log.
 340  *
 341  * PARAMS
 342  *  str [I] The message to be logged and given to the debugger.
 343  *
 344  * RETURNS
 345  *
 346  *  Nothing.
 347  */
 348 void WINAPI OutputDebugStringW( LPCWSTR str )
 349 {
 350     UNICODE_STRING strW;
 351     STRING strA;
 352
 353     RtlInitUnicodeString( &strW, str );
 354     if (!RtlUnicodeStringToAnsiString( &strA, &strW, TRUE ))
 355     {
 356         OutputDebugStringA( strA.Buffer );
 357         RtlFreeAnsiString( &strA );
 358     }
 359 }
 360
 361
 362 /***********************************************************************
 363  *           DebugBreak   (KERNEL32.@)
 364  *
 365  *  Raises an exception so that a debugger (if attached)
 366  *  can take some action.
 367  */
 368 #if defined(__i386__) || defined(__x86_64__)
 369 __ASM_STDCALL_FUNC( DebugBreak, 0, "jmp " __ASM_NAME("DbgBreakPoint") )
 370 #else
 371 void WINAPI DebugBreak(void)
 372 {
 373     DbgBreakPoint();
 374 }
 375 #endif
 376
 377 /***********************************************************************
 378  *           DebugBreakProcess   (KERNEL32.@)
 379  *
 380  *  Raises an exception so that a debugger (if attached)
 381  *  can take some action. Same as DebugBreak, but applies to any process.
 382  *
 383  * PARAMS
 384  *  hProc [I] Process to break into.
 385  *
 386  * RETURNS
 387  *
 388  *  True if successful.
 389  */
 390 BOOL WINAPI DebugBreakProcess(HANDLE hProc)
 391 {
 392     BOOL ret, self;
 393
 394     TRACE("(%p)\n", hProc);
 395
 396     SERVER_START_REQ( debug_break )
 397     {
 398         req->handle = wine_server_obj_handle( hProc );
 399         ret = !wine_server_call_err( req );
 400         self = ret && reply->self;
 401     }
 402     SERVER_END_REQ;
 403     if (self) DbgBreakPoint();
 404     return ret;
 405 }
 406
 407
 408 /***********************************************************************
 409  *           IsDebuggerPresent   (KERNEL32.@)
 410  *
 411  *  Allows a process to determine if there is a debugger attached.
 412  *
 413  * PARAMS
 414  *
 415  * RETURNS
 416  *
 417  *  True if there is a debugger attached.
 418  */
 419 BOOL WINAPI IsDebuggerPresent(void)
 420 {
 421     return NtCurrentTeb()->Peb->BeingDebugged;
 422 }
 423
 424 /***********************************************************************
 425  *           CheckRemoteDebuggerPresent   (KERNEL32.@)
 426  *
 427  *  Allows a process to determine if there is a remote debugger
 428  *  attached.
 429  *
 430  * PARAMS
 431  *
 432  * RETURNS
 433  *
 434  *  TRUE because it is a stub.
 435  */
 436 BOOL WINAPI CheckRemoteDebuggerPresent(HANDLE process, PBOOL DebuggerPresent)
 437 {
 438     NTSTATUS status;
 439     DWORD_PTR port;
 440
 441     if(!process || !DebuggerPresent)
 442     {
 443         SetLastError(ERROR_INVALID_PARAMETER);
 444         return FALSE;
 445     }
 446
 447     status = NtQueryInformationProcess(process, ProcessDebugPort, &port, sizeof(port), NULL);
 448     if (status != STATUS_SUCCESS)
 449     {
 450         SetLastError(RtlNtStatusToDosError(status));
 451         return FALSE;
 452     }
 453
 454     *DebuggerPresent = !!port;
 455     return TRUE;
 456 }
 457
 458 /***********************************************************************
 459  *           DebugSetProcessKillOnExit                    (KERNEL32.@)
 460  *
 461  * Let a debugger decide whether a debuggee will be killed upon debugger
 462  * termination.
 463  *
 464  * PARAMS
 465  *  kill [I] If set to true then kill the process on exit.
 466  *
 467  * RETURNS
 468  *  True if successful, false otherwise.
 469  */
 470 BOOL WINAPI DebugSetProcessKillOnExit(BOOL kill)
 471 {
 472     BOOL ret = FALSE;
 473
 474     SERVER_START_REQ( set_debugger_kill_on_exit )
 475     {
 476         req->kill_on_exit = kill;
 477         ret = !wine_server_call_err( req );
 478     }
 479     SERVER_END_REQ;
 480     return ret;
 481 }