vm/os-windows.cpp

   1 #include "master.hpp"
   2
   3 namespace factor
   4 {
   5
   6 HMODULE hFactorDll;
   7
   8 void factor_vm::init_ffi()
   9 {
  10         hFactorDll = GetModuleHandle(FACTOR_DLL);
  11         if(!hFactorDll)
  12                 fatal_error("GetModuleHandle() failed", 0);
  13 }
  14
  15 void factor_vm::ffi_dlopen(dll *dll)
  16 {
  17         dll->handle = LoadLibraryEx((WCHAR *)alien_offset(dll->path), NULL, 0);
  18 }
  19
  20 void *factor_vm::ffi_dlsym(dll *dll, symbol_char *symbol)
  21 {
  22         return (void *)GetProcAddress(dll ? (HMODULE)dll->handle : hFactorDll, symbol);
  23 }
  24
  25 void *factor_vm::ffi_dlsym_raw(dll *dll, symbol_char *symbol)
  26 {
  27         return ffi_dlsym(dll, symbol);
  28 }
  29
  30 void factor_vm::ffi_dlclose(dll *dll)
  31 {
  32         FreeLibrary((HMODULE)dll->handle);
  33         dll->handle = NULL;
  34 }
  35
  36 BOOL factor_vm::windows_stat(vm_char *path)
  37 {
  38         BY_HANDLE_FILE_INFORMATION bhfi;
  39         HANDLE h = CreateFileW(path,
  40                         GENERIC_READ,
  41                         FILE_SHARE_READ,
  42                         NULL,
  43                         OPEN_EXISTING,
  44                         FILE_FLAG_BACKUP_SEMANTICS,
  45                         NULL);
  46
  47         if(h == INVALID_HANDLE_VALUE)
  48         {
  49                 // FindFirstFile is the only call that can stat c:\pagefile.sys
  50                 WIN32_FIND_DATA st;
  51                 HANDLE h;
  52
  53                 if(INVALID_HANDLE_VALUE == (h = FindFirstFile(path, &st)))
  54                         return false;
  55                 FindClose(h);
  56                 return true;
  57         }
  58         BOOL ret = GetFileInformationByHandle(h, &bhfi);
  59         CloseHandle(h);
  60         return ret;
  61 }
  62
  63 void factor_vm::windows_image_path(vm_char *full_path, vm_char *temp_path, unsigned int length)
  64 {
  65         wcsncpy(temp_path, full_path, length - 1);
  66         size_t full_path_len = wcslen(full_path);
  67         if (full_path_len < length - 1)
  68                 wcsncat(temp_path, L".image", length - full_path_len - 1);
  69         temp_path[length - 1] = 0;
  70 }
  71
  72 /* You must free() this yourself. */
  73 const vm_char *factor_vm::default_image_path()
  74 {
  75         vm_char full_path[MAX_UNICODE_PATH];
  76         vm_char *ptr;
  77         vm_char temp_path[MAX_UNICODE_PATH];
  78
  79         if(!GetModuleFileName(NULL, full_path, MAX_UNICODE_PATH))
  80                 fatal_error("GetModuleFileName() failed", 0);
  81
  82         if((ptr = wcsrchr(full_path, '.')))
  83                 *ptr = 0;
  84
  85         wcsncpy(temp_path, full_path, MAX_UNICODE_PATH - 1);
  86         size_t full_path_len = wcslen(full_path);
  87         if (full_path_len < MAX_UNICODE_PATH - 1)
  88                 wcsncat(temp_path, L".image", MAX_UNICODE_PATH - full_path_len - 1);
  89         temp_path[MAX_UNICODE_PATH - 1] = 0;
  90
  91         return safe_strdup(temp_path);
  92 }
  93
  94 /* You must free() this yourself. */
  95 const vm_char *factor_vm::vm_executable_path()
  96 {
  97         vm_char full_path[MAX_UNICODE_PATH];
  98         if(!GetModuleFileName(NULL, full_path, MAX_UNICODE_PATH))
  99                 fatal_error("GetModuleFileName() failed", 0);
 100         return safe_strdup(full_path);
 101 }
 102
 103 void factor_vm::primitive_existsp()
 104 {
 105         vm_char *path = untag_check<byte_array>(ctx->pop())->data<vm_char>();
 106         ctx->push(tag_boolean(windows_stat(path)));
 107 }
 108
 109 segment::segment(cell size_, bool executable_p)
 110 {
 111         size = size_;
 112
 113         char *mem;
 114         DWORD ignore;
 115
 116         if((mem = (char *)VirtualAlloc(NULL, getpagesize() * 2 + size,
 117                 MEM_COMMIT, executable_p ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE)) == 0)
 118                 out_of_memory();
 119
 120         if (!VirtualProtect(mem, getpagesize(), PAGE_NOACCESS, &ignore))
 121                 fatal_error("Cannot allocate low guard page", (cell)mem);
 122
 123         if (!VirtualProtect(mem + size + getpagesize(),
 124                 getpagesize(), PAGE_NOACCESS, &ignore))
 125                 fatal_error("Cannot allocate high guard page", (cell)mem);
 126
 127         start = (cell)mem + getpagesize();
 128         end = start + size;
 129 }
 130
 131 segment::~segment()
 132 {
 133         SYSTEM_INFO si;
 134         GetSystemInfo(&si);
 135         if(!VirtualFree((void*)(start - si.dwPageSize), 0, MEM_RELEASE))
 136                 fatal_error("Segment deallocation failed",0);
 137 }
 138
 139 long getpagesize()
 140 {
 141         static long g_pagesize = 0;
 142         if(!g_pagesize)
 143         {
 144                 SYSTEM_INFO system_info;
 145                 GetSystemInfo (&system_info);
 146                 g_pagesize = system_info.dwPageSize;
 147         }
 148         return g_pagesize;
 149 }
 150
 151 void factor_vm::move_file(const vm_char *path1, const vm_char *path2)
 152 {
 153         if(MoveFileEx((path1),(path2),MOVEFILE_REPLACE_EXISTING) == false)
 154                 general_error(ERROR_IO,tag_fixnum(GetLastError()),false_object);
 155 }
 156
 157 void factor_vm::init_signals() {}
 158
 159 THREADHANDLE start_thread(void *(*start_routine)(void *), void *args)
 160 {
 161         return (void *)CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)start_routine, args, 0, 0);
 162 }
 163
 164 u64 nano_count()
 165 {
 166         static double scale_factor;
 167
 168         static u32 hi = 0;
 169         static u32 lo = 0;
 170
 171         LARGE_INTEGER count;
 172         BOOL ret = QueryPerformanceCounter(&count);
 173         if(ret == 0)
 174                 fatal_error("QueryPerformanceCounter", 0);
 175
 176         if(scale_factor == 0.0)
 177         {
 178                 LARGE_INTEGER frequency;
 179                 BOOL ret = QueryPerformanceFrequency(&frequency);
 180                 if(ret == 0)
 181                         fatal_error("QueryPerformanceFrequency", 0);
 182                 scale_factor = (1000000000.0 / frequency.QuadPart);
 183         }
 184
 185 #ifdef FACTOR_64
 186         hi = count.HighPart;
 187 #else
 188         /* On VirtualBox, QueryPerformanceCounter does not increment
 189         the high part every time the low part overflows.  Workaround. */
 190         if(lo > count.LowPart)
 191                 hi++;
 192 #endif
 193         lo = count.LowPart;
 194
 195         return (u64)((((u64)hi << 32) | (u64)lo) * scale_factor);
 196 }
 197
 198 void sleep_nanos(u64 nsec)
 199 {
 200         Sleep((DWORD)(nsec/1000000));
 201 }
 202
 203 LONG factor_vm::exception_handler(PEXCEPTION_RECORD e, void *frame, PCONTEXT c, void *dispatch)
 204 {
 205         c->ESP = (cell)fix_callstack_top((stack_frame *)c->ESP);
 206         ctx->callstack_top = (stack_frame *)c->ESP;
 207
 208         switch (e->ExceptionCode)
 209         {
 210         case EXCEPTION_ACCESS_VIOLATION:
 211                 signal_fault_addr = e->ExceptionInformation[1];
 212                 c->EIP = (cell)factor::memory_signal_handler_impl;
 213                 break;
 214
 215         case STATUS_FLOAT_DENORMAL_OPERAND:
 216         case STATUS_FLOAT_DIVIDE_BY_ZERO:
 217         case STATUS_FLOAT_INEXACT_RESULT:
 218         case STATUS_FLOAT_INVALID_OPERATION:
 219         case STATUS_FLOAT_OVERFLOW:
 220         case STATUS_FLOAT_STACK_CHECK:
 221         case STATUS_FLOAT_UNDERFLOW:
 222         case STATUS_FLOAT_MULTIPLE_FAULTS:
 223         case STATUS_FLOAT_MULTIPLE_TRAPS:
 224 #ifdef FACTOR_64
 225                 signal_fpu_status = fpu_status(MXCSR(c));
 226 #else
 227                 signal_fpu_status = fpu_status(X87SW(c) | MXCSR(c));
 228
 229                 /* This seems to have no effect */
 230                 X87SW(c) = 0;
 231 #endif
 232                 MXCSR(c) &= 0xffffffc0;
 233                 c->EIP = (cell)factor::fp_signal_handler_impl;
 234                 break;
 235         default:
 236                 signal_number = e->ExceptionCode;
 237                 c->EIP = (cell)factor::misc_signal_handler_impl;
 238                 break;
 239         }
 240
 241         return 0;
 242 }
 243
 244 VM_C_API LONG exception_handler(PEXCEPTION_RECORD e, void *frame, PCONTEXT c, void *dispatch)
 245 {
 246         return current_vm()->exception_handler(e,frame,c,dispatch);
 247 }
 248
 249 void factor_vm::open_console() {}
 250
 251 }