vm/os-windows-nt.cpp

   1 #include "master.hpp"
   2
   3 namespace factor
   4 {
   5
   6 THREADHANDLE start_thread(void *(*start_routine)(void *), void *args)
   7 {
   8         return (void *)CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)start_routine, args, 0, 0);
   9 }
  10
  11 DWORD dwTlsIndex;
  12
  13 void init_platform_globals()
  14 {
  15         if ((dwTlsIndex = TlsAlloc()) == TLS_OUT_OF_INDEXES)
  16                 fatal_error("TlsAlloc failed - out of indexes",0);
  17 }
  18
  19 void register_vm_with_thread(factor_vm *vm)
  20 {
  21         if (! TlsSetValue(dwTlsIndex, vm))
  22                 fatal_error("TlsSetValue failed",0);
  23 }
  24
  25 factor_vm *tls_vm()
  26 {
  27         factor_vm *vm = (factor_vm*)TlsGetValue(dwTlsIndex);
  28         assert(vm != NULL);
  29         return vm;
  30 }
  31
  32 u64 system_micros()
  33 {
  34         FILETIME t;
  35         GetSystemTimeAsFileTime(&t);
  36         return (((u64)t.dwLowDateTime | (u64)t.dwHighDateTime<<32)
  37                 - EPOCH_OFFSET) / 10;
  38 }
  39
  40 /* On VirtualBox, QueryPerformanceCounter does not increment
  41 the high part every time the low part overflows.  Workaround. */
  42 u64 nano_count()
  43 {
  44         LARGE_INTEGER count;
  45         LARGE_INTEGER frequency;
  46         static u32 hi = 0;
  47         static u32 lo = 0;
  48         BOOL ret;
  49         ret = QueryPerformanceCounter(&count);
  50         if(ret == 0)
  51                 fatal_error("QueryPerformanceCounter", 0);
  52         ret = QueryPerformanceFrequency(&frequency);
  53         if(ret == 0)
  54                 fatal_error("QueryPerformanceFrequency", 0);
  55
  56         if(count.LowPart < lo)
  57                 hi += 1;
  58         lo = count.LowPart;
  59
  60         return (u64)((((u64)hi << 32) | (u64)lo)*(1000000000.0/frequency.QuadPart));
  61 }
  62
  63 void sleep_nanos(u64 nsec)
  64 {
  65         Sleep((DWORD)(nsec/1000000));
  66 }
  67
  68 LONG factor_vm::exception_handler(PEXCEPTION_POINTERS pe)
  69 {
  70         PEXCEPTION_RECORD e = (PEXCEPTION_RECORD)pe->ExceptionRecord;
  71         CONTEXT *c = (CONTEXT*)pe->ContextRecord;
  72
  73         if(in_code_heap_p(c->EIP))
  74                 signal_callstack_top = (stack_frame *)c->ESP;
  75         else
  76                 signal_callstack_top = NULL;
  77
  78         switch (e->ExceptionCode)
  79         {
  80         case EXCEPTION_ACCESS_VIOLATION:
  81                 signal_fault_addr = e->ExceptionInformation[1];
  82                 c->EIP = (cell)factor::memory_signal_handler_impl;
  83                 break;
  84
  85         case STATUS_FLOAT_DENORMAL_OPERAND:
  86         case STATUS_FLOAT_DIVIDE_BY_ZERO:
  87         case STATUS_FLOAT_INEXACT_RESULT:
  88         case STATUS_FLOAT_INVALID_OPERATION:
  89         case STATUS_FLOAT_OVERFLOW:
  90         case STATUS_FLOAT_STACK_CHECK:
  91         case STATUS_FLOAT_UNDERFLOW:
  92         case STATUS_FLOAT_MULTIPLE_FAULTS:
  93         case STATUS_FLOAT_MULTIPLE_TRAPS:
  94                 signal_fpu_status = fpu_status(X87SW(c) | MXCSR(c));
  95                 X87SW(c) = 0;
  96                 MXCSR(c) &= 0xffffffc0;
  97                 c->EIP = (cell)factor::fp_signal_handler_impl;
  98                 break;
  99         case 0x40010006:
 100                 /* If the Widcomm bluetooth stack is installed, the BTTray.exe
 101                 process injects code into running programs. For some reason this
 102                 results in random SEH exceptions with this (undocumented)
 103                 exception code being raised. The workaround seems to be ignoring
 104                 this altogether, since that is what happens if SEH is not
 105                 enabled. Don't really have any idea what this exception means. */
 106                 break;
 107         default:
 108                 signal_number = e->ExceptionCode;
 109                 c->EIP = (cell)factor::misc_signal_handler_impl;
 110                 break;
 111         }
 112         return EXCEPTION_CONTINUE_EXECUTION;
 113 }
 114
 115 FACTOR_STDCALL(LONG) exception_handler(PEXCEPTION_POINTERS pe)
 116 {
 117         return tls_vm()->exception_handler(pe);
 118 }
 119
 120 void factor_vm::c_to_factor_toplevel(cell quot)
 121 {
 122         if(!AddVectoredExceptionHandler(0, (PVECTORED_EXCEPTION_HANDLER)factor::exception_handler))
 123                 fatal_error("AddVectoredExceptionHandler failed", 0);
 124
 125         c_to_factor(quot);
 126
 127         RemoveVectoredExceptionHandler((void *)factor::exception_handler);
 128 }
 129
 130 void factor_vm::open_console()
 131 {
 132 }
 133
 134 }