libjava/win32.cc

   1 // win32.cc - Helper functions for Microsoft-flavored OSs.
   2
   3 /* Copyright (C) 2002, 2003  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 #include <config.h>
  12 #include <platform.h>
  13 #include <sys/timeb.h>
  14 #include <stdlib.h>
  15 #include <fcntl.h>
  16
  17 #include <java/lang/ArithmeticException.h>
  18 #include <java/lang/UnsupportedOperationException.h>
  19 #include <java/io/IOException.h>
  20 #include <java/net/SocketException.h>
  21 #include <java/util/Properties.h>
  22
  23 static LONG CALLBACK
  24 win32_exception_handler (LPEXCEPTION_POINTERS e)
  25 {
  26   if (e->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
  27     _Jv_ThrowNullPointerException();
  28   else if (e->ExceptionRecord->ExceptionCode == EXCEPTION_INT_DIVIDE_BY_ZERO)
  29     throw new java::lang::ArithmeticException;
  30   else
  31     return EXCEPTION_CONTINUE_SEARCH;
  32 }
  33
  34 // Platform-specific executable name
  35 static char exec_name[MAX_PATH];
  36   // initialized in _Jv_platform_initialize()
  37
  38 const char *_Jv_ThisExecutable (void)
  39 {
  40   return exec_name;
  41 }
  42
  43 // Helper classes and methods implementation
  44
  45 // class WSAEventWrapper
  46 WSAEventWrapper::WSAEventWrapper (int fd, DWORD dwSelFlags):
  47   m_hEvent(0),
  48   m_fd(fd),
  49   m_dwSelFlags(dwSelFlags)
  50 {
  51   m_hEvent = WSACreateEvent ();
  52   if (dwSelFlags)
  53     WSAEventSelect(fd, m_hEvent, dwSelFlags);
  54 }
  55
  56 WSAEventWrapper::~WSAEventWrapper ()
  57 {
  58   if (m_dwSelFlags)
  59   {
  60     WSAEventSelect(m_fd, m_hEvent, 0);
  61     if (m_dwSelFlags & (FD_ACCEPT | FD_CONNECT))
  62     {
  63       // Set the socket back to non-blocking mode.
  64       // Ignore any error since we're in a destructor.
  65       unsigned long lSockOpt = 0L;
  66         // blocking mode
  67       ::ioctlsocket (m_fd, FIONBIO, &lSockOpt);
  68     }
  69   }
  70   WSACloseEvent (m_hEvent);
  71 }
  72
  73 // Error string text.
  74 jstring
  75 _Jv_WinStrError (LPCTSTR lpszPrologue, int nErrorCode)
  76 {
  77   LPTSTR lpMsgBuf = 0;
  78
  79   DWORD dwFlags = FORMAT_MESSAGE_ALLOCATE_BUFFER |
  80     FORMAT_MESSAGE_FROM_SYSTEM |
  81     FORMAT_MESSAGE_IGNORE_INSERTS;
  82
  83   FormatMessage (dwFlags,
  84     NULL,
  85     (DWORD) nErrorCode,
  86     MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
  87     (LPTSTR) &lpMsgBuf,
  88     0,
  89     NULL);
  90
  91   jstring ret;
  92   if (lpszPrologue)
  93     {
  94       LPTSTR lpszTemp =
  95         (LPTSTR) _Jv_Malloc (strlen (lpszPrologue) +
  96           strlen (lpMsgBuf) + 3);
  97       strcpy (lpszTemp, lpszPrologue);
  98       strcat (lpszTemp, ": ");
  99       strcat (lpszTemp, lpMsgBuf);
 100       ret = JvNewStringLatin1 (lpszTemp);
 101     }
 102   else
 103     {
 104       ret = JvNewStringLatin1 (lpMsgBuf);
 105     }
 106
 107   LocalFree(lpMsgBuf);
 108   return ret;
 109 }
 110
 111 jstring
 112 _Jv_WinStrError (int nErrorCode)
 113 {
 114   return _Jv_WinStrError (0, nErrorCode);
 115 }
 116
 117 void _Jv_ThrowIOException (DWORD dwErrorCode)
 118 {
 119   throw new java::io::IOException (_Jv_WinStrError (dwErrorCode));
 120 }
 121
 122 void _Jv_ThrowIOException()
 123 {
 124   DWORD dwErrorCode = WSAGetLastError ();
 125   _Jv_ThrowIOException (dwErrorCode);
 126 }
 127
 128 void _Jv_ThrowSocketException (DWORD dwErrorCode)
 129 {
 130   throw new java::net::SocketException (_Jv_WinStrError (dwErrorCode));
 131 }
 132
 133 void _Jv_ThrowSocketException()
 134 {
 135   DWORD dwErrorCode = WSAGetLastError ();
 136   _Jv_ThrowSocketException (dwErrorCode);
 137 }
 138
 139 // Platform-specific VM initialization.
 140 void
 141 _Jv_platform_initialize (void)
 142 {
 143   // Initialise winsock for networking
 144   WSADATA data;
 145   if (WSAStartup (MAKEWORD (1, 1), &data))
 146     MessageBox (NULL, "Error initialising winsock library.", "Error",
 147     MB_OK | MB_ICONEXCLAMATION);
 148
 149   // Install exception handler
 150   SetUnhandledExceptionFilter (win32_exception_handler);
 151
 152   // Initialize our executable name
 153   GetModuleFileName(NULL, exec_name, sizeof(exec_name));
 154 }
 155
 156 // gettimeofday implementation.
 157 jlong
 158 _Jv_platform_gettimeofday ()
 159 {
 160   struct timeb t;
 161   ftime (&t);
 162   return t.time * 1000LL + t.millitm;
 163 }
 164
 165 // The following definitions "fake out" mingw to think that -mthreads
 166 // was enabled and that mingwthr.dll was linked. GCJ-compiled
 167 // applications don't need this helper library because we can safely
 168 // detect thread death (return from Thread.run()).
 169
 170 int _CRT_MT = 1;
 171
 172 extern "C" int
 173 __mingwthr_key_dtor (DWORD, void (*) (void *))
 174 {
 175   // FIXME: for now we do nothing; this causes a memory leak of
 176   //        approximately 24 bytes per thread created.
 177   return 0;
 178 }
 179
 180 static bool dirExists (const char* dir)
 181 {
 182   DWORD dwAttrs = ::GetFileAttributes (dir);
 183   return dwAttrs != 0xFFFFFFFF &&
 184     (dwAttrs & FILE_ATTRIBUTE_DIRECTORY) != 0;
 185 }
 186
 187 static void getUserHome(char* userHome, const char* userId)
 188 {
 189   char* uh = ::getenv ("USERPROFILE");
 190   if (uh)
 191     {
 192       strcpy(userHome, uh);
 193     }
 194   else
 195     {
 196       // Make a half-hearted attempt to support this
 197       // legacy version of Windows. Try %WINDIR%\Profiles\%USERNAME%
 198       // and failing this, use %WINDIR%.
 199       //
 200       // See:http://java.sun.com/docs/books/tutorial/security1.2/summary/files.html#UserPolicy
 201       //
 202       // To do this correctly, we'd have to factor in the
 203       // Windows version, but if we did that, then this attempt
 204       // wouldn't be half-hearted.
 205       char userHomePath[MAX_PATH], winHome[MAX_PATH];
 206       ::GetWindowsDirectory(winHome, MAX_PATH);
 207         // assume this call always succeeds
 208
 209       sprintf(userHomePath, "%s\\Profiles\\%s", winHome, userId);
 210       if (dirExists (userHomePath))
 211         strcpy(userHome, userHomePath);
 212       else
 213         strcpy(userHome, winHome);
 214     }
 215 }
 216
 217 // Set platform-specific System properties.
 218 void
 219 _Jv_platform_initProperties (java::util::Properties* newprops)
 220 {
 221   // A convenience define.
 222 #define SET(Prop,Val) \
 223   newprops->put(JvNewStringLatin1 (Prop), JvNewStringLatin1 (Val))
 224
 225   SET ("file.separator", "\\");
 226   SET ("path.separator", ";");
 227   SET ("line.separator", "\r\n");
 228
 229   // Use GetCurrentDirectory to set 'user.dir'.
 230   DWORD buflen = MAX_PATH;
 231   char *buffer = (char *) _Jv_MallocUnchecked (buflen);
 232   if (buffer != NULL)
 233     {
 234       if (GetCurrentDirectory (buflen, buffer))
 235   SET ("user.dir", buffer);
 236
 237       if (GetTempPath (buflen, buffer))
 238   SET ("java.io.tmpdir", buffer);
 239
 240       _Jv_Free (buffer);
 241     }
 242
 243   // Use GetUserName to set 'user.name'.
 244   buflen = 257;  // UNLEN + 1
 245   char userName[buflen];
 246   if (GetUserName (userName, &buflen))
 247     SET ("user.name", userName);
 248
 249   // Set user.home
 250   char userHome[MAX_PATH];
 251   getUserHome(userHome, userName);
 252   SET ("user.home", userHome);
 253
 254   // Get and set some OS info.
 255   OSVERSIONINFO osvi;
 256   ZeroMemory (&osvi, sizeof(OSVERSIONINFO));
 257   osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
 258   if (GetVersionEx (&osvi))
 259     {
 260       char *buffer = (char *) _Jv_MallocUnchecked (30);
 261       if (buffer != NULL)
 262         {
 263           sprintf (buffer, "%d.%d", (int) osvi.dwMajorVersion,
 264            (int) osvi.dwMinorVersion);
 265           SET ("os.version", buffer);
 266           _Jv_Free (buffer);
 267         }
 268
 269       switch (osvi.dwPlatformId)
 270         {
 271           case VER_PLATFORM_WIN32_WINDOWS:
 272             if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 0)
 273               SET ("os.name", "Windows 95");
 274             else if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 10)
 275               SET ("os.name", "Windows 98");
 276             else if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 90)
 277               SET ("os.name", "Windows Me");
 278             else
 279               SET ("os.name", "Windows ??");
 280             break;
 281
 282           case VER_PLATFORM_WIN32_NT:
 283             if (osvi.dwMajorVersion <= 4 )
 284               SET ("os.name", "Windows NT");
 285             else if (osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 0)
 286               SET ("os.name", "Windows 2000");
 287             else if (osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1)
 288               SET ("os.name", "Windows XP");
 289             else
 290               SET ("os.name", "Windows NT ??");
 291             break;
 292
 293           default:
 294             SET ("os.name", "Windows UNKNOWN");
 295             break;
 296        }
 297   }
 298
 299   // Set the OS architecture.
 300   SYSTEM_INFO si;
 301   GetSystemInfo (&si);
 302   switch (si.wProcessorArchitecture)
 303     {
 304       case PROCESSOR_ARCHITECTURE_INTEL:
 305         SET ("os.arch", "x86");
 306         break;
 307       case PROCESSOR_ARCHITECTURE_MIPS:
 308         SET ("os.arch", "mips");
 309         break;
 310       case PROCESSOR_ARCHITECTURE_ALPHA:
 311         SET ("os.arch", "alpha");
 312         break;
 313       case PROCESSOR_ARCHITECTURE_PPC:
 314         SET ("os.arch", "ppc");
 315         break;
 316       case PROCESSOR_ARCHITECTURE_IA64:
 317         SET ("os.arch", "ia64");
 318         break;
 319       case PROCESSOR_ARCHITECTURE_UNKNOWN:
 320       default:
 321         SET ("os.arch", "unknown");
 322         break;
 323     }
 324 }
 325
 326 /* Store up to SIZE return address of the current program state in
 327    ARRAY and return the exact number of values stored.  */
 328 int
 329 backtrace (void **__array, int __size)
 330 {
 331   register void *_ebp __asm__ ("ebp");
 332   register void *_esp __asm__ ("esp");
 333   unsigned int *rfp;
 334
 335   int i=0;
 336   for (rfp = *(unsigned int**)_ebp;
 337        rfp && i < __size;
 338        rfp = *(unsigned int **)rfp)
 339     {
 340       int diff = *rfp - (unsigned int)rfp;
 341       if ((void*)rfp < _esp || diff > 4 * 1024 || diff < 0) break;
 342
 343     __array[i++] = (void*)(rfp[1]-4);
 344   }
 345   return i;
 346 }
 347
 348 int
 349 _Jv_select (int n, fd_set *readfds, fd_set  *writefds,
 350       fd_set *exceptfds, struct timeval *timeout)
 351 {
 352   int r = ::select (n, readfds, writefds, exceptfds, timeout);
 353   if (r == SOCKET_ERROR)
 354     {
 355       DWORD dwErrorCode = WSAGetLastError ();
 356       throw new java::io::IOException (_Jv_WinStrError (dwErrorCode));
 357     }
 358   return r;
 359 }
 360
 361 int
 362 _Jv_pipe (int filedes[2])
 363 {
 364   return _pipe (filedes, 4096, _O_BINARY);
 365 }