vm/objects.hpp

   1 namespace factor
   2 {
   3
   4 // Special object count and identifiers must be kept in sync with:
   5 //   core/kernel/kernel.factor
   6 //   core/bootstrap/image/image.factor
   7
   8 static const cell special_object_count = 80;
   9
  10 enum special_object {
  11         OBJ_WALKER_HOOK = 3,       /* non-local exit hook, used by library only */
  12         OBJ_CALLCC_1,              /* used to pass the value in callcc1 */
  13
  14         ERROR_HANDLER_QUOT = 5,    /* quotation called when VM throws an error */
  15         OBJ_ERROR,                 /* a marker consed onto kernel errors */
  16
  17         OBJ_CELL_SIZE = 7,         /* sizeof(cell) */
  18         OBJ_CPU,                   /* CPU architecture */
  19         OBJ_OS,                    /* operating system name */
  20
  21         OBJ_ARGS = 10,             /* command line arguments */
  22         OBJ_STDIN,                 /* stdin FILE* handle */
  23         OBJ_STDOUT,                /* stdout FILE* handle */
  24
  25         OBJ_IMAGE = 13,            /* image path name */
  26         OBJ_EXECUTABLE,            /* runtime executable path name */
  27
  28         OBJ_EMBEDDED = 15,         /* are we embedded in another app? */
  29         OBJ_EVAL_CALLBACK,         /* used when Factor is embedded in a C app */
  30         OBJ_YIELD_CALLBACK,        /* used when Factor is embedded in a C app */
  31         OBJ_SLEEP_CALLBACK,        /* used when Factor is embedded in a C app */
  32
  33         OBJ_STARTUP_QUOT = 20,     /* startup quotation */
  34         OBJ_GLOBAL,                /* global namespace */
  35         OBJ_SHUTDOWN_QUOT,         /* shutdown quotation */
  36
  37         /* Quotation compilation in quotations.c */
  38         JIT_PROLOG = 23,
  39         JIT_PRIMITIVE_WORD,
  40         JIT_PRIMITIVE,
  41         JIT_WORD_JUMP,
  42         JIT_WORD_CALL,
  43         JIT_IF_WORD,
  44         JIT_IF,
  45         JIT_SAFEPOINT,
  46         JIT_EPILOG,
  47         JIT_RETURN,
  48         JIT_PROFILING,
  49         JIT_PUSH_IMMEDIATE,
  50         JIT_DIP_WORD,
  51         JIT_DIP,
  52         JIT_2DIP_WORD,
  53         JIT_2DIP,
  54         JIT_3DIP_WORD,
  55         JIT_3DIP,
  56         JIT_EXECUTE,
  57         JIT_DECLARE_WORD,
  58
  59         /* External entry points */
  60         C_TO_FACTOR_WORD = 43,
  61         LAZY_JIT_COMPILE_WORD,
  62         UNWIND_NATIVE_FRAMES_WORD,
  63         GET_FPU_STATE_WORD,
  64         SET_FPU_STATE_WORD,
  65         SIGNAL_HANDLER_WORD,
  66         LEAF_SIGNAL_HANDLER_WORD,
  67         FFI_SIGNAL_HANDLER_WORD,
  68         FFI_LEAF_SIGNAL_HANDLER_WORD,
  69
  70         /* Incremented on every modify-code-heap call; invalidates call( inline
  71         caching */
  72         REDEFINITION_COUNTER = 52,
  73
  74         /* Callback stub generation in callbacks.c */
  75         CALLBACK_STUB = 53,
  76
  77         /* Polymorphic inline cache generation in inline_cache.c */
  78         PIC_LOAD = 54,
  79         PIC_TAG,
  80         PIC_TUPLE,
  81         PIC_CHECK_TAG,
  82         PIC_CHECK_TUPLE,
  83         PIC_HIT,
  84         PIC_MISS_WORD,
  85         PIC_MISS_TAIL_WORD,
  86
  87         /* Megamorphic cache generation in dispatch.c */
  88         MEGA_LOOKUP = 62,
  89         MEGA_LOOKUP_WORD,
  90         MEGA_MISS_WORD,
  91
  92         OBJ_UNDEFINED = 65,       /* default quotation for undefined words */
  93
  94         OBJ_STDERR = 66,          /* stderr FILE* handle */
  95
  96         OBJ_STAGE2 = 67,          /* have we bootstrapped? */
  97
  98         OBJ_CURRENT_THREAD = 68,
  99
 100         OBJ_THREADS = 69,
 101         OBJ_RUN_QUEUE = 70,
 102         OBJ_SLEEP_QUEUE = 71,
 103
 104         OBJ_VM_COMPILER = 72,     /* version string of the compiler we were built with */
 105
 106         OBJ_WAITING_CALLBACKS = 73,
 107 };
 108
 109 /* save-image-and-exit discards special objects that are filled in on startup
 110 anyway, to reduce image size */
 111 #define OBJ_FIRST_SAVE OBJ_STARTUP_QUOT
 112 #define OBJ_LAST_SAVE OBJ_STAGE2
 113
 114 inline static bool save_special_p(cell i)
 115 {
 116         return (i >= OBJ_FIRST_SAVE && i <= OBJ_LAST_SAVE);
 117 }
 118
 119 template<typename Iterator> void object::each_slot(Iterator &iter)
 120 {
 121         cell scan = (cell)this;
 122         cell payload_start = binary_payload_start();
 123         cell end = scan + payload_start;
 124
 125         scan += sizeof(cell);
 126
 127         while(scan < end)
 128         {
 129                 iter((cell *)scan);
 130                 scan += sizeof(cell);
 131         }
 132 }
 133
 134 }